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Proceedings of the Iowa Academy of Science

Volume 87 Number Article 8

1980

A Checklist of the Vascular Flora of Allamakee County, Iowa

James H. Peck University of - La Crosse

Dean M. Roosa Conservation Commission

Lawrence J. Eilers University of Northern Iowa

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Copyright ©1980 Iowa Academy of Science, Inc. Follow this and additional works at: https://scholarworks.uni.edu/pias

Recommended Citation Peck, James H.; Roosa, Dean M.; and Eilers, Lawrence J. (1980) "A Checklist of the Vascular Flora of Allamakee County, Iowa," Proceedings of the Iowa Academy of Science, 87(2), 62-75. Available at: https://scholarworks.uni.edu/pias/vol87/iss2/8

This Research is brought to you for free and open access by the Iowa Academy of Science at UNI ScholarWorks. It has been accepted for inclusion in Proceedings of the Iowa Academy of Science by an authorized editor of UNI ScholarWorks. For more information, please contact [email protected]. Peck et al.: A Checklist of the Vascular Flora of Allamakee County, Iowa

Proc. Iowa Acad. Sci. 87(2):62-75. 1980

A Checklist of the Vascular Flora of Allamakee County, Iowa

JAMES H. PECK1 , DEAN M. ROOSA2 , and LAWRENCE J. EILERS3

1 Department of Biology, University of Wisconsin-La Crosse, La Crosse, WI 54601 2state Preserves Advisory Board, Conservation Commission, Des Moines, IA 50319 3 Department of Biology, University of Northern Iowa, Cedar Falls, IA 50613

Based upon field and herbarium study, the vascular flora of Allamakee County is composed of 1040 taxa ( plus hybrids), including 46 endangered and 23 threatened Iowa species. This number represents approximately 50% of the species in the state flora and is the greatest number of taxa documented for a single Iowa county. The large and diverse flora reflects the diversity of topography and habitat types within the county. The study resulted in the addition of four taxa to the state flora ( americana, Dryopteris X triploidea, Equisetum X litorale, and douglasii) and in the location of populations of two species previously considered extirpated within the state (Dryopteris intermedia and /lex venicillata). INDEX DESCRIPTORS: Allamakee County Aora, Driftless Area Aora, Endangered Species, Iowa Vascular Aora, Threatened Plant Species.

Allamakee County is located in extreme northeastern Iowa, bounded steep bluffs and difficulties of access into wetlands along the Missis­ on the east by the and on the north by the Minnesota sippi River and tributary rivers within the county hampers field search. state boundary. The landscape consists of a relatively flat upland Thus, it is very likely that continued field efforts within Allamakee (Paleozoic Plateau) which is covered by thin loess and occasionally County will add new county and state records and will result in the some patches of Nebraskan glacial drift (Scholtes and Swenson, 1958). discovery of new localities of botanical interest. The bed rock controls terrain features, which consist of v-shaped Herbarium search was conducted to I) corroborate the occurrence of valleys, abruptly dissected escarpments, and a mature drainage system species reported by Hartley ( 1962) which were not observed in the (Prior, 1976). Exposures of Niagara limestones and St. Peter sand­ field, 2) completely search herbaria only partially examined by stones occur throughout the county. This physiographic diversity, Hartley, and 3) search additional herbaria having specimens of Al­ exceptional within Iowa, is typical of Allamakee and adjacent counties lamakee County . Search was conducted at Effigy Mounds Na­ which form the western edge of the Driftless Area. Counties within this tional Monument (EMNM), Iowa State University (ISC), University of portion of the Driftless Area exhibit a great diversity of habitats which Iowa (IA), University of Northern Iowa (ISTC), and University of are occupied by a great diversity of plant communities of northern Wisconsin-La Crosse (UWL). Our vouchers are deposited at Univer­ forest, eastern forest, and tall grass prairie biomes (Hartley, 1960). sity of Northern Iowa (ISTC). The county has been a subject of botanical study for approximately The checklist is alphabetized to facilitate manual and computer 100 years. Observations on the special nature of its communities and on processing. Family and higher categories are in general agreement with the presence of rare plants were reported by Pammel ( 1891), Fitzpatrick treatments by Cronquist (1968) for seed plants and Crabbe, Jermy, and (1899), Parnmel and King (1901), Pammel (1905), Shimek (1924), Mickel (1975) for ferns and fern allies. Binomials and common names Hayden (1940; 1945), and Thorne (1953; 1956). A floristic study are selected to follow: l) recent Iowa taxonomic treatments for undertaken by Hagge (1929) was stimulated by Pammel's earlier ob­ (Crawford, 1970), Orchidaceae (Niemann, 1974), Poaceae servation (Pammel, 1905) that the bluff floras of Iowa and Wisconsin (Pohl, 1966), and ferns and fern allies (Peck, 1976); 2) regional were similar. These studies were expanded in scope and thoroughness manuals (Fernald, 1950; Gleason and Cronquist, 1963), and 3) state by Hartley (1966) in his flora of the entire Driftless Area of , floras adjacentto the county (Mohlenbrock, 1975). The list is annotated Iowa, Minnesota, and Wisconsin. Tolstead (1938) published a list of with an asterisk(*) before the binomial of naturalized species, a double species in a format that did not distinguish plant occurrence within exclamation mark(!!) before an Iowa endangered plant, and a single Allamakee County from occurrence in adjacent counties. Hartley exclamation mark (!) before an Iowa threatened plant (Roosa and (1962) included dot maps of the Driftless Area in his unpublished Ph.D. Eilers, 1978). Plants known only in cultivation are not listed. The thesis, from which a county list of 858 taxa was extracted. This flora county checklist is consistent with the Iowa checklist only included Hartley's personal collections, specimens at the Univer­ being prepared by Eilers. sity oflowa herbarium, and limited inspection of specimens elsewhere. Many obvious omissions from the Allamakee County flora in that list VASCULAR PLANT CHECKLIST indicated that field and herbarium study was needed in order to prepare a relatively complete county flora. A total of 1040 taxa (species plus hybrids) is reported. This is the During 1978 the Preserves Advisory Board of the Iowa Conservation greatest number of taxa documented for a single Iowa county; 966 were Commission sponsored a natural history foray in Allamakee County to reported from Johnson County by Thorne (1955). This number repre­ inventory natural areas and their associated species. The foray initiated sents over 50% of the estimated Iowa flora (Eilers, 1975). Although the preparation of this update and revision of the vascular flora of most of the taxa in Allamakee County are also represented in other Iowa Allmakee County, Iowa. counties (Eilers, 1965), many species rare in Iowa occur in Allamakee County, including 46 Iowa endangered and 23 Iowa threatened plants. METHODS The study led to the addition offourtaxa to the state flora(, Dryopteris X triploidea, Equisetum X litorale, and Field collections were made in 1978 and 1979. All of Hartley's ) and to the discovery of populations of two collecting stations were visited (Hartley, 1962); additional stations of species previously considered extirpated within Iowa (Dryopteris in­ botanical interest were also examined. Special emphasis was placed termedia and /lex verticillata). With many rare plant populations lo­ upon habitats within Yellow River State Forest. The ruggedness of the cated within Allamakee County, continued efforts to preserve critical

Published by UNI ScholarWorks, 1980 1 Proceedings of the Iowa Academy of Science, Vol. 87 [1980], No. 2, Art. 8

FLORA OF ALLAMAKEE COUNTY, IOWA 63

habitats are necessary. Studies of the species biology of these popula­ Dryopteris spinulosa (0.F. Muell.) Watt (Spinulose Wood Fem) tions are needed to suggest approaches for population recovery and to Dryopteris X triploidea Wherry (D. intermedia X D. spinulosa) aid in interpreting the phytogeography of the county flora. The checklist will also facilitate county-level natural area inventories. !Gymnocarpium dryopteris (L.) Gray ( Fem) !!Gymnocarpium robertianum (Hoff.) Newm. (Limestone Oak Fem) Matteuccia struthiopteris (L.) Tod. (Ostrich Fem) EQUISETOPHYTA Onoclea sensibilis L. (Sensitive Fem) EQUISETACEAE (Horsetail Family) Polystichum acrostichoides (Michx.) Schott (Christmas Fem) Equisetum arvense L. (Field Horsetail) ! !Woodsia ilvensis (L.) R. Br. (Rusty Cliff Fem) !Equisetum jluviatile L. (Water Horsetail) Woodsia obtusa (Spreng.) Torr. (Blunt-lobed Cliff Fem) Equisetum hyemale L. (Common Scouring-rush) !!Woodsia oregana D.C. Eat. (Western Cliff Fem) Equisetum laevigatum A. Br. (Smooth Scouring-rush) AZOLLACEAE (Mosquito Fern Family) !Equisetum pratense Ehrh. (Meadow Horsetail) Azolla mexicana Pres!. (Mosquito Fem) ! !Equisetum scirpoides Michx. (Dwarf Scouring-rush) Equisetum X ferrissii Clute (E. hyemale XE. laevigatum) DENNSTAEDTIACEAE (Bracken Family) Pteridium aquilinum (L.) Kuhn (Bracken Fern) Equisetum X litorale Kuhl. (E. arvense XE. jluviatile) OPHIOGLOSSACEAE (Adder's-Tongue Fem Family) Botrychium dissectum Spreng. f. dissectum (Dissected Grape Fem) LYCOPODIOPHYTA Botrychium dissectum Spreng. f. obliquum (Muhl.) Fem. (Oblique Grape Fem) L YCOPODIACEAE (Clubmoss Family) ! !Botrychium multifidum (Gmel.) Rupr. (Leather Grape Fem) ! !Lycopodium dendroideum Michx. (Round-branched Clubmoss) Botrychium virginianum (L.) Sw. (Rattlesnake Fem) !!Lycopodiumjlabelliforme (Fem.) Blanch. (Crowfoot Clubmoss) !Lycopodium lucidulum Michx. (Shining Clubmoss) OSMUNDACEAE (Royal Fern Family) !!Lycopodium porophilum Lloyd & Underw. (Rock Clubmoss) Osmunda claytoniana L. (Interrupted Fern) ! !Osmunda regalis L. (Royal Fem) Lycopodium lucidulum Michx. XL. porophilum Lloyd & Underw. (Shining-Rock Hybrid Clubmoss) POLYPODIACEAE (Polypody Fem Family) SELAGINELLACEAE (Spikemoss Family) Polypodium virginianum L. (Rock-cap Fem) !Selaginella rupestris (L.) Spring (Rock Spikemoss) THEL YPTERIDACEAE (Marsh Fern Family) Phegopteris hexagonoptera (Michx.) Fee (Southern Fem) Thelypteris palustris (L.) Schott (Marsh Fern) POLYPODIOPHYTA

ADIANTACEAE (Maidenhair Fem Family) Adiantum pedatum L. (Northern Maidenhair Fem) PINOPHYTA Cheilanthes feei Moore (Slender Lip Fem) CUPRESSACEAE (Cypress Family) Cryptogramma stelleri (Gmel.) Prantl (Slender Cliff-brake) Juniperus communis L. (Common Juniper) !!Pellaea atropurpurea (L.) Link (Purple Cliff-brake) Juniperus virginiana L. (Red Cedar) Pellaea glabella Mett. ex. Kuhn (Smooth Cliff-brake) *Thuja occidentalis L. (White Cedar)

ASPLENIACEAE (Common Fem Family) PINACEAE (PINE FAMILY) Asplenium platyneuron Oakes ex. D.C. Eat. (Ebony Spleenwort) Abies balsamea (L.) Mill. (Balsam Fir) Athyrium angustum (Willd.) Pres! (Northerneastem Lady Fem) Pinus strobus L. (White Pine) Athyrium pycnocarpon (Spreng.) Tidestr. (Glade Fem) TAXACEAE (Yew Family) Athyrium thelypterioides (Michx.) Desv. (Silvery Glade Fem) Taxus canadensis Marsh. (American Yew) Camptosorus rhizaphyllus (L.) Link (Walking Fem) Cystopteris bulbifera (L.) Bemh. (Bulblet Fern) Cystopterisfragilis (L.) Bernh. var. mackayi Laws. (Mackay's Fragile MAGNOLIOPHYTA: MAGNOLIATAE Fem) Cystopteris protrusa (Weath.) Blasdell (Creeping Fragile Fem) ACANTHACEAE (Acanthus Family) Dryopteris cristata (L.) Gray (Crested Wood Fem) Ruellia humilis Nutt. (Wild Petunia) Dryopteris goldiana (Hook.) Gray (Goldie's Wood Fem) ACERACEAE (Maple Family) !!Dryopteris intermedia (Muhl.) Gray (Glandular Wood Fem) Acer negundo L. (Boxelder) !!Dryopteris marginalis (L.) Gray (Marginal Shield Fem) Acer nigrum Michx. f. (Black Maple)

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64 PROC. IOWA ACAD. SCI. 87 (1980)

Acer saccharinum L. (Silver Maple) Panax quinquefolius L. (Ginseng) Acer saccharum Marsh. (Sugar Maple) ARISTOLOCHIACEAE (Birthwort Family) Acer spicatum Lam. (Mountain Maple) Asarum canadense L. (Wild Ginger)

ADOXACEAE (Moschatel Family) ASCLEPIADACEAE (Milkweed Family) !Adoxa moschatellina L. (Moschatel) Asclepias amplexicaulis Sm. (Sand Milkweed) AIZOACEAE (Carpetweed) Asclepias exaltata L. (Poke Milkweed) Asclepias hirtella (Pennell) Woodson (Hairy Milkweed) *Mollugo verticillata L. (Carpetweed) Asclepias incarnata L. (Swamp Milkweed) AMARANTHACEAE (Amaranth Family) ! !Asclepias lanuginosa Nutt. (Woolly Milkweed) Amaranthus albus L. (Pigweed) Asclepias ovalifolia Dene. (Oval-leaved Milkweed) *Amaranthus graecizans L. (Prostrate Pigweed) Asclepias syriaca L. (Common Milkweed) *Amaranthus retroflexus L. (Pigweed) Asclepias tuberosa L. (Butterfly-weed) Amaranthus tamariscinus (Nutt.) Wood (Pigweed) Asclepias verticillata L. (Whorled Milkweed) Amaranthus tuberculatus (Moq.) J .D. Sauer (Water-hemp) Asclepias viridiflora Raf. (Green Milkweed) Froelichia floridana (Nutt.) Moq. (Cotton weed) (Aster Family) ANACARDIACEAE (Cashew Family) Rhus glabra L. (Smooth Sumac) *Achillea millefolium L. (Common Yarrow) Rhus typhina L. (Staghorn Sumac) artemisiifolia L. (Common Ragweed) Toxicodendron radicans Ktze. subsp. negundo (Greene) Gillis (Poison Ambrosia psilostachya DC. var. coronopifolia (Torr. & Gray) Farw. Ivy) (Western Ragweed) Toxicodendron rydbergii (Small ex Rydb.) Greene (Poison Ivy) Ambrosia trifida L. (Great Ragweed) Antennaria neglecta Greene (Field Pussytoes) APIACEAE (Parsley Family) Antennaria plantaginifolia (L.) Richards. (Pussytoes) Chaerophyllum procumbens (L.) Crantz (Prostrate Chervil) *Anthemis cotula L. (Stinking Chamomile) Cicuta bulbifera L. (Water-hemlock) *Arctium minus Schk. (Common Burdock) Cicuta maculata L. (Spotted Cowbane) Cryptotaenia canadensis (L.)DC. (Honewort) *Artemisia biennis Willd. (Wormwood) *Daucus carota L. (Queen Anne's Lace) Artemisia campestris L. ssp. caudata (Michx.) Hall & Clem. (Wormwood) Eryngium yuccifolium Michx. (Rattlesnake-master) Artemisia ludoviciana Nutt. (Prairie-sage) Heracleum lanatum Michx. (Cow-parsnip) Aster azureus Lindi. (Sky Blue Aster) Osmorhiza claytoni (Michx.) Clarke (Sweet Cicely) Aster cordifolius L. (Blue Wood Aster) Osmorhiza longistylis (Torr.) DC. (Anise-root) Aster drummondii Lindi. (Drummond's Aster) *Pastinaca sativa L. (Parsnip) Aster ericoides L. (Heath Aster) canadensis L. (Canadian Black Snakeroot) Aster laevis L. (Smooth Aster) Sanicula gregaria Bickn. (Common Snakeroot) Aster lateriflorus (L.) Britt. (Side-flowered Aster) Sanicula marilandica L. (Black Snakeroot) Aster novae-angliae L. (New England Aster) Sanicula trifoliata Bickn. (Large-fruited Black Snakeroot) Aster oblongifolius Nutt. (Aromatic Aster) Sium suave Walt. (Water-parsnip) Aster ontarionis Wieg. ( Aster) Taenidia integerrima (L.) Drude (Yellow Pimpernel) Aster prenanthoides Muhl. (Aster) Thaspium barbinode (Michx.) Nutt. (Meadow-parsnip) Aster ptarmicoides (Nees) Torr. & Gray (Aster) Zizia aurea (L.) W.D.J. Koch (Golden Alexanders) Aster pubentior Cronq. (Pubescent Aster) APOCYNACEAE (Dogbane Family) Aster puniceus L. (Swamp Aster) Apocynum androsaemifolium L. (Spreading Dogbane) Aster sagittifolius Wedemeyer ex. Willd. (Arrow-leaved Aster) Apocynum cannabinum L. (Indian Hemp) Aster sericeus Vent. (Silky Aster) Apocynum sibiricum Jacq. (Indian Hemp) Aster short ii Lindi. (Short's Aster) AQUIFOLIACEAE (Holly Family) Aster simplex Willd. (Panicled Aster) !!flex verticillata (L.) Gray (Winterberry) Aster umbellatus Mill. (Flat-topped Aster) ARALIACEAE (Ginseng Family) Bidens cernua L. (Stick-tight) Aralia nudicaulis L. (Wild Sarsaparilla) Bidens frondosa L. (Beggar-ticks) Aralia racemosa L. (Spikenard) *Bidens tripartita L. (European Beggar-ticks)

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FLORA OF ALLAMAKEE COUNTY, IOWA 65

Bidens vulgata Greene (Common Beggar-ticks) jloridana (L.) Gaertn. (Blue ) Boltonia asteroides (L.) L'Her (Boltonia) (Nutt.) Riddell (Louisiana Lettuce) Cacalia muhlenbergii (Schultz-Hip.) Fern. (Great Indian-plantain) * L. (Prickly Lettuce) Cacalia tuberosa Nutt. (Tuberous Indian-plantain) Liatris aspera Michx. (Rough Blazing Star) *Chrysanthemum leucanthemum L. (Ox-eye Daisy) Liatris cylindracea Michx. (Cylindric Blazing Star) *Cichorium intybus L. (Chicory) Liatris pycnostachya Michx. (Prairie Blazing Star) Cirsium altissimum (L.) Spreng. (Tall Thistle) *Matricaria matricarioides (Less.) Porter (Pineapple-weed) *Cirsium arvense (L.) Scop. (Canada Thistle) Polymnia canadensis L. (Leafcup) Cirsium discolor (Muhl.) Spreng. (Field Thistle) Prenanthes alba L. (Rattlesnake-root) Cirsium hillii (Canby) Fern. (Hill's Thistle) Ratibia pinnata (Vent.) Barnh. (Prairie-coneflower) *Cirsium vulgare (Savi) Tenore (Bull Thistle) Rudbeckia hirta L. (Black-eyed Susan) Conyza canadensis (L.) Cronq. (Horseweed) Rudbeckia laciniata L. (Green-headed Coneflower) Coreopsis palmata Nutt. (Stiff Tickseed) Rudbeckia triloba L. (Thin-leaved Coneflower) Echinacea pallida Nutt. (Purple Coneflower) Senecio aureus L. (Golden Ragwort) Erechtites hieracifolia (L.) Raf. (Pilewort) Senecio pauperculus Michx. (Balsam Ragwort) *Erigeron annuus (L.) Pers. (Daisy Fleabane) Senecio plattensis Nutt. (Prairie Ragwort) Erigeron philadelphicus L. (Common Fleabane) Silphium integrifolium Michx. (Entire-leaved Rosinweed) Erigeron pulchellus Michx. (Robin-plantain) Silphium laciniatum L. (Compass Plant) *Erigeron strigosus Muhl. (Daisy Fleabane) Silphium perfoliatum L. (Cup-plant) altissimum L. (Thoroughwort) Solidago bicolor L. (Silverrod) Eupatorium maculatum L. (Spotted Joe-pye-weed) Solidago caesia L. (Blue-stemmed Goldenrod) Eupatorium perfoliatum L. (Thoroughwort Boneset) Solidago canadensis L. (Tall Goldenrod) Eupatorium purpureum L. (Sweet Joe-pye-weed) Solidago flexicaulis L. (Zigzag Goldenrod) Eupatorium rugosum Houtt. (White Snakeroot) Solidago gigantea Ait. (Late Goldenrod) !Eupatorium sessilifolium L. (Upland Boneset) Solidago glaberrima Martens (Bunched Goldenrod) *Galinsoga ciliata (Raf.) Blake (Hairy Galinsoga) Solidago graminifolia (L.) Salish. (Grass-leaved Goldenrod) *Galinsoga parvijlora Cav. (Small-flowered Galinsoga) Solidago hispida Muhl. (Hairy Goldenrod Gnaphalium obtusifolium L. (Sweet Everlasting) Solidago juncea Ait. (Stiff Goldenrod) Gnaphalium purpureum L. (Pearly Everlasting) Solidago missouriensis Nutt. (Missouri Goldenrod) Grindelia squarrosa (Pursh) Dunal (Gumweed) Solidago nemoralis Ait. (Gray Goldenrod) Helenium autumnale L. (Sneezeweed) Solidago rigida L. (Stiff Goldenrod) Helianthus annuus L. (Common Sunflower) Solidago sciaphila Steele (Goldenrod) Helianthus decapetalus L. (Thin-leaved Sunflower) Solidago speciosa Nutt. (Showy Goldenrod) Helianthus divaricatus L. (Spreading Sunflower) Solidago ulmifolia Muhl. (Elm-leaved Goldenrod) Helianthus giganteus L. (Gigantic Sunflower) *Sonchus arvensis L. (Field Sow-thistle) Helianthus grosseserratus Martens (Serrate Sunflower) *Sonchus oleraceus L. (Common Sow-thistle) Helianthus occidentalis Riddell (Western Sunflower) *Sonchus uliginosus Bieb. (Marsh Sow-thistle) Helianthus rigidus (Cass.) Fern. (Prairie Sunflower) *Tanacetum vulgare L. (Tansy) Helianthus strumosus L. (Pale-leaved Wood Sunflower) *Taraxacum laevigatum (Willd.) DC. (Red-seeded Dandelion) *Helianthus tuberosus L. (Jerusalem-artichoke) *Taraxacum officinale Weber (Common Dandelion) Heliopsis helianthoides (L.) Sweet (Ox Eye) *Tragopogon dubius Scop. (Goat's-beard) Hieracium canadense Michx. (Canadian Hawkweed) *Tragopogon pratensis L. (Yellow Goat's-beard) Hieracium longipilum Torr. (Long-haired Hawkweed) Vernonia altissima Nutt. (Tall lronweed) Hieracium scabrum Michx. (Rough Hawkweed) Vernonia fasciculata Michx. (Bunched Iron weed) Hieracium umbellatum L. (Hawkweed) *Xanthium strumarium L. (Cocklebur) Iva xanthifolia Nutt. (Marsh-elder) Krigia bijlora (Walt.) Blake BALSAMINACEAE (Touch-me-not Family) Kuhnia eupatorioides L. (False Boneset) Impatiens bi.flora Walt. (Spotted Touch-me-not) Lactuca canadensis L. (Wild Lettuce) Impatiens pallida Nutt. (Pale Touch-me-not) https://scholarworks.uni.edu/pias/vol87/iss2/8 4 Peck et al.: A Checklist of the Vascular Flora of Allamakee County, Iowa

66 PROC. IOWA ACAD. SCI. 87 (1980)

BERBERIDACEAE (Barberry Family) *Cardaria fenestrata (Boiss.) Rollins (Hoary Cress) Berberis vulgaris L. (European Barberry) Dentaria laciniata Muhl. (Toothwort) Caulophyllum thalictroides (L.) Michx. (Blue Cohosh) Descurainia pinnata (Walt.) Britt. (Tansy-mustard) !'Jeffersonia diphylla (L.) Pers. (Twinleaf) Draba reptans (Lam.) Fem. (Whitlow Grass) Podophyllum peltatum L. (May-apple) *Erysimum cheiranthoides L. (Wormseed Mustard) BETULACEAE (Birch Family) *Lepidium campestre (L.) Br. (Cow-cress) A/nus rugosa (DuRoi) Spreng. (Speckled Alder) *Lepidium densiflorum Schrad. (Peppergrass) Betula lutea Michx. f. (Yellow Birch) *Nasturtium officinale R. Br. (Watercress) Betula nigra L. (River Birch) *Raphanus raphanistrum L. (Jointed Charlock) Betula papyrifera Marsh. (Paper Birch) Rorippa islandica (Oeder) Borbas (Yellow Cress) ! IJJetula pumila L. var. glandulifera Regel (Glandular Dwarf Birch) Rorippa sessilijlora (Nutt.) Hitchc. (Sessile-flowered Yellow Cress) Carpinus caroliniana Walt. (Blue-beech) *Rorippa sylvestris (L.) Besser (Creeping Yellow Cress) Cory/us americana Walt. (American Hazel) *Sisymbrium altissimum L. (Tumble-mustard) Cory/us cornuta Marsh. (Beaked Hazel) *Sisymbrium officinale (L.) Scop. (Hedge-mustard) Ostrya virginiana (Mill.) K. Koch (Hop Hornbeam) *Thlaspi arvense L. (Penny-cress)

BIGNONIACEAE (Trumpetcreeper Family) CACTACEAE (Cactus Family) *Catalpa speciosa Warder (Cigar Tree) Opuntia compressa (Salish.) Macbr. (Prickly Pear) BORAGINACEAE (Borage Family) CALLITRICHACEAE (Water Starwort Family) *Cynoglossum officinale L. (Common Hound's-tongue) !Callitriche palustris L. (Water Starwort) Hackelia deflexa (Wahl.) Opiz (Stickseed) CAMPANULACEAE (Bluebell Family) Hackelia virginiana (L.) Johnst. (Stickseed) Campanula americana L. (Tall Bellflower) *Lappula echinata Gilib. (Stickseed) Campanula aparinoides Pursh (Marsh Bellflower) Lithospermum canescens (Michx.) Lehm. (Hoary Puccoon) Campanula rotundifolia L. (Harebell) Lithospermum caroliniense (Walt.) MacM. (Puccoon) Lobelia cardinalis L. (Cardinal Flower) Lithospermum croceum Fem. (Hairy Puccoon) Lobelia inflata L. (Indian-tobacco) Lithospermum incisum Lehm. (Narrow-leaved Puccoon) Lobelia siphilitica L. (Great Lobelia) Lithospermum latifolium Michx. (Broad-leaved Puccoon) Lobelia spicata Lam. (Pale Spike Lobelia) Mertensia virginica (L.) Pers. (Bluebell) Lobelia spicata Lam. (Pale Spike Lobelia) *Myosotis scorpioides L. (True Forget-me-not) Triodanis perfoliata (L.) Nieuwl. (Venus' Looking-glass) Onosmodium hispidissimum Mackenz. (Hairy Marble-seed) CANNABINACEAE (Hemp Family) Onosmodium occidentale Mackenz. (Western Marble-seed) * sativa L. (Hemp) BRASSICACEAE (Mustard Family) *Humulus japonicus Sieb. & Zucc. (Japanese Hops) Arabis canadensis L. (Sickle-pod) Humulus lupulus L. (Common Hops) Arabis drummondi Gray (Rock Cress) CAPPARIDACEAE (Caper Family) Arabis glabra (L.) Bemh. (Tower Mustard) Polansia dodecandra (L.) DC. (Clammyweed) Arabis hirsuta (L.) Scop. (Hairy Rock Cress) Arabis laevigata (Muhl.) Poir. (Smooth Rock Cress) CAPRIFOLIACEAE (Honeysuckle Family) Diervilla lonicera Mill. (Bush-honeysuckle) Arabis lyrata L. (-leaved Rock Cress) Arabis missouriensis Greene (Green Rock Cress) Lonicera dioica L. (Wild Honeysuckle) Arabis shortii (Fem.) GI. (Short's Rock Cress) *Lonicera morrowi Gray (Morrow's Honeysuckle) Armoracia rusticana Gaertn., Mey. Scherb. (Horseradish) Lonicera prolifera (Kirchn.) Rehd. (Wild Grape-honeysuckle) *Barbarea vulgaris R. Br. (Yellow Rocket) Sambucus canadensis L. (Common Elder) Sambucus pubens Michx. (Red-berried Elder) *Berteroa incana (L.) DC. (Hoary Alyssum) Symphoricarpos albus (L.) Blake (Snowberry) *Brassica juncea (L.) Coss. (Chinese Mustard) *Brassica kaber (DC.) L. Wheeler (Charlock) Triosteum aurantiacum (Bickn.) Wieg. (Wild Coffee) Triosteum perfoliatum L. (Tinker's-weed) *Brassica nigra (L.) Koch (Black Mustard) *Capsella bursa-pastoris (L.) Medic. (Shepherd's-purse) Viburnum lentago L. (Nannyberry) Cardamine bulbosa (Schreb.) BSP (Spring Cress) Viburnum opulus L. var. americanum Ait. (High-bush Cranberry) Cardamine pensylvanica Muhl. (Bitter Cress) Viburnum rafinesquianum Schult. (Downy Arrow-wood)

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FLORA OF ALLAMAKEE COUNTY, IOWA 67

CARYOPHYLLACEAE (Pink Family) CUCURBITACEAE (Gourd Family) *Agrostemma githago L. (Com Cockle) Echinocystis lobata (Michx.) T. & G. (Wild Curcumber) Arenaria laterijlora L. (Grove Sandwort) Sicyos angulatus L. (Bar Cucumber) Arenaria stricta Michx. (Rock Sandwort) CUSCUT ACEAE (Dodder Family) ! !Cerastium arvense L. (Field Chickweed) Cuscuta coryli Engelm. (Dodder) Cerastium nutans Raf. (Nodding Mouse-ear Chickweed) Cuscuta cuspidata Engelm. (Dodder) *Cerastium vulgatum L. (Common Mouse-ear Chickweed) Cuscuta gronovii Willd. (Dodder) *Lynchnis alba Mill. (Evening Lychnis) Cuscuta polygonatum Engelm. (Dodder) *Myosoton aquaticum (L.) Moench (Giant Chickweed) ERICACEAE (Heath Family) Paronychia canadensis (L.) Wood (Forked Chickweed) !!Vaccinium angustifolium Ait. (Low Sweet Blueberry) *Saponaria officinalis L. (Bouncing Bet) Silene antirrhina L. (Sleepy Catch-fly) EUPHORBIACEAE (Spurge Family) Acalypha rhomboidea Raf. (Three-seeded Mercury) *Silene cserei Baumg. (Bladder-campion) Croton glandulosus L. (Glandular Croton) Silene nivea (Nutt.) Otth. (Snowy Campion) Euphorbia corollata L. (Flowering Spurge) *Silene noctijlora L. (Night-flowering Catch-fly) Euphorbia cyathophora Murr. (Painted-) Silene stellata (L.) Ait. f. (Starry Campion) *Euphorbia cyparissias L. (Cypress Spurge) Stellaria longifolia Muhl. (Starwort) *Euphorbia geyeri Engelm. (Geyer's Spurge) *Stellaria media (L.) Cyrill. (Common Chickweed) Euphorbia glyptosperma Engelm. (Spurge) CELASTRACEAE (Staff-tree Family) Euphorbia maculata L. (Eyebane) Celastrus scandens L. (Bittersweet) Euphorbia supina Raf. (Milk-purslane) Euonymus atropurpureus Jacq. (Wahoo) FABACEAE (Bean Family) CERATOPHYLLACEAE (Homwort Family) Amorpha canescens Pursh (Leadplant) Ceratophyllum demersum L. (Coontail) Amorpha fruticosa L. (Bastard Indigo) CHENOPODIACEAE (Goosefoot Family) Amphicarpa bracteata (L.) Fem. (Hog-peanut) Atriplex patula L. var. hasta (L.) Gray (Spear Scale) Apios americana Medic. (Groundnut) *Chenopodium album L. (Lamb's-quarters) Astragalus canadensis L. (Milk-vetch) *Chenopodium botrys L. (Jerusalum-oak) Baptisia leucantha T. & G. (White False Indigo) *Chenopodium capitatum (L.) Aschers. (Goosefoot) Baptisia leucophaea Nutt. (Cream Wild Indigo) *Chenopodium desiccatum A. Nels. (Goosefoot) Chamaecrista fasciculata (Michx.) Greene (Partridge-pea) Chenopodium hybridum L. (Maple-leaved Goosefoot) Desmodium canadense (L.) DC. (Showy Tick Trefoil) Chenopodium standleyanum Aellen (Standley's Goosefoot) Desmodium cuspidatum (Muhl.) Loud. (Large-bracted Tick Trefoil) Cycloloma atriplicifolium (Spreng.) Coult. (Winged Pigweed) Desmodium glutinosum (Muhl.) Wood (Pointed Tick Trefoil) *Salsola iberica Sennen & Pau. (Russian-thistle) Desmodium illinoense Gray (Illinois Tick Trefoil) CISTACEAE (Rockrose Family) Desmodium nudijlorum (L.) DC. (Bare-stemmed Tick Trefoil) Helianthemum bicknellii Fern. (Bicknell 's Frostweed) Gleditsia triacanthos L. (Honey Locust) Helianthemum canadense (L.) Michx. (Frostweed) *Glycine max (L.) Merr. (Soy-bean) ! !Lechea intermedia Leggett (Pin weed) Gymnocladus dioica (L.) K. Koch (Kentucy Coffee-tree) Lechea stricta Leggett (Upright Pinweed) Lathyrus ochroleucus Hook. (Pale Vetchling) Lathyrus palustris L. (Marsh Vetchling) CONVOLVULACEAE (Morning-glory Family) *Convolvulus arvensis L. (Field-bindweed) Lathyrus venosus Muhl. var. intonsus Butters & St. John (Vetchling) Convolvulus sepium L. (Wild Morning-glory) Lespedeza capitata Michx. (Bush-clover) Convolvulus spithamaeus L. (Low Bindweed) *Lotus corniculatus L. (Bird's-foot Trefoil) *Medicago lupulina L. (Black Medick) CORNACEAE (Dogwood Family) Cornus alternifolia L.f. (Pagoda Dogwood) *Medicago sativa L. (Alfalfa) Cornus drummondii C.A. Meyer (Hairy Dogwood) *Melilotus alba Desr. (White Sweet Clover) Cornus obliqua Raf. (Silky Dogwood) *Melilotus officinalis (L.) Lam. (Yellow Sweet Clover) Cornus racemosa Lam. (Gray Dogwood) Petalostemum candidum (Willd.) Michx. (White Prairie-clover) Cornus rugosa Lam. (Round-leaved Dogwood) Petalostemum purpureum (Vent.) Rydb. (Purple Prairie-clover) Cornus stolonifera Michx. (Red Dogwood) Psoralea argophylla Pursh (Silver-leaved Scurf-pea)

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68 PROC. IOWA ACAD. SCI. 87 (1980)

Robinia pseudoacacia L. (Black Locust) pyramidatum Ait. (Great St. John's-wort) Strophostyles helvola (L.) Ell. (Wild Bean) Hypericum spathulatum (Spach) Steud. (Robust St. John's-wort) Tephrosia virginiana (L.) Pers. (Goat's-rue) JUGLANDACEAE (Walnut Family) *Trifolium campestre Schreb. (Low Hop-clover) Carya cordiformis (Wang.) K. Koch (Bitternut Hickory) *Trifolium hybridum L. (Alsike Clover) Carya ovata (Mill.) K. Koch (Shagbark Hickory) *Trifolium pratense L. (Red Clover) Jug/ans cinerea L. (Butternut) *Trifolium repens L. (White Clover) Jug/ans nigra L. (Black Walnut) Vicia americana Muhl. (Vetch) LAMIACEAE (Mint Family) *Vicia angustifolia Reich. (Common Vetch) Agastache nepetoides (L.) Kuntze. (Giant Hyssop) *Vicia villosa Roth (Hairy Vetch) Agastache scrophulariaefolia (Willd.) Ktze. (Purple Giant Hyssop) FAGACEAE (Beech Family) Blephilia hirsuta (Pursh) Benth. (Wood Mint) Quercus alba L. (White Oak) *Galeopsis tetrahit L. (Hemp-nettle) Quercus bicolor Willd. (Swamp White Oak) *Glecoma hederacea L. var. parviflora Druce (Ground-ivy) Quercus borealis Michx. f. (Northern Red Oak) Hedeoma hispida Pursh (Mock Pennyroyal) Quercus ellipsoidalis E.J. Hill (Jack-oak) *Leonurus cardiaca L. (Common Motherwort) Quercus macrocarpa Michx. (Bur Oak) Lycopus americanus Muhl. (Common Water Horehound) Quercus prinoides Willd. var. acuminata (Michx.) GI. (Yellow Oak) Lycopus uniflorus Michx. (Northern Bugle Weed) Quercus velutina Lam. (Black Oak) Mentha arvensis L. (Field Mint) FUMARIACEAE (Fumitory Family) *Mentha spicata L. (Spearmint) Corydalis micrantha (Engelm.) Gray ssp. micrantha Ownbey (Slender Monarda dydima L. (Oswego-tea) Fumewort) Monardafistulosa L. (Wild Bergamo!) Corydalis sempervirens (L.) Pers. (Pale Corydalis) Monarda punctata L. (Dotted Monarda) Dicentra canadensis (Goldie) Walp. (Squirrel-com) *Nepeta cataria L. (Catnip) Dicentra cucullaria (L.) Bemh. (Dutchman's Breeches) Physostegia virginiana (L.) Benth. (False Dragonhead) GENTIANACEAE (Gentian Family) Prune/la vulgaris L. (Heal-all) Gentiana andrewsii Griseb. (Closed Gentian) Pycnanthemum pilosum Nutt. (Mountain Mint) !Gentiana crinita Froel. (Fringed Gentian) Pycnanthemum tenuifolium Schrad. (Slender Mountain Mint) Gentiana flavida Gray (Yellowish Gentian) Pycnanthemum virginianum (L.) Durand & Jackson (Mountain Mint) Gentiana puberula Michx. (Prairie Gentian) *Satureja vulgaris (L.) Fritsch (Basil) Gentiana quinquefolia L. (Stiff Gentian) Scutellaria galericulata L. (Common Skullcap) GERANIACEAE (Geranium Family) Scutellaria lateriflora L. (Mad-dog Skullcap) Geranium maculatum L. (Wild Cranesbill) Scutellaria ovata Hill (Skullcap) Scutellaria parvula Michx. (Small Skullcap) HALORAGACEAE (Water-Milfoil Family) Myriophyllum pinnatum (Walt.) BSP. (Water-milfoil) Stachys palustris L. (Woundwort) Stachys tenuifolia Willd. (Hedge-nettle) HAMAMELIDACEAE (Witch-Hazel Family) Teucrium canadense L. (American Germander) Hamamelis virginiana L. (Witch-hazel) Trichostema dichotomum L. (Blue Curls)

HIPPOCASTANACEAE (Horse Chestnut Family) LINACEAE (Flax Family) Aesculus glabra Willd. ( Buckeye) Linum sulcatum Riddell (Wild Flax) *Aesculus hippocastanum L. (Horse Chestnut) L YTHRACEAE (Loosestrife Family) HYDROPHYLLACEAE (Waterleaf Family) ! !Decodon verticillatus (L.) Ell. (Water-) Ellisia nyctelea L. (Waterpod) Lythrum dacotanum Nieuwl. (Winged Loosestrife) Hydrophyllum appendiculatum Michx. (Waterleaf) MAL V ACEAE (Mallow Family) Hydrophyllum virginianum L. (John's-cabbage) *Abutilon theophrasti Medic. (Velvet-leaf) (St. John's-wort Family) !Callirhoe triangulata (Leavenw .) Gray (Poppy-mallow) Hypericum majus (Gray) Britt. (St. John's-wort) Hibiscus militaris Cav. (Rose-mallow) L. (Dwarf St. John's-wort) *Hibiscus trionum L. (Flower-of-an-hour) * L. (Common St. John's-wort) *Malva neglecta Wallr. (Cheeses) Lam. (Spotted St. John's-wort) ! Wapaea dioica L. (Glade-mallow)

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FLORA OF ALLAMAKEE COUNTY, IOWA 69

MENISPERMACEAE (Moonseed Family) PAPA VERACEAE (Poppy Family) Menispermum canadense L. (Moonseed) *Chelidonium majus L. (Celandine) Sanguinaria canadensis L. (Bloodroot) MENY ANTHACEAE (Bogbean Family) !!Menyanthes trifoliata L. (Bogbean) PHRYMACEAE (Lopseed Family) Phryma leptostachya L. (Lopseed) MONOTROPACEAE (Indian-pipe Family) Monotropa hypopithys L. (False Beech-drops) PHYTOLACCACEAE (Pokeweed Family) Monotropa uniflora L. (Indian-pipe) Phytolacca americana L. (Pokeweed)

MORACEAE (Mulberry Family) PLANTAGINACEAE (Plantain Family) *Maclura pomifera (Osage-orange) Plantago aristata Michx. (Bracted Plantain) *Morus alba L. (White Mulberry) *Plantago lanceolata L. (English Plaintain) Morus rubra L. (Red Mulberry) *Plantago major L. (Common Plantain) Plantago patagonica Jacq. (Salt-and-Pepper Plant) NELUMBONACEAE (Lotus Family) Plantago rugelli Dene. (Rugel's Plantain) Nelumbo lutea (Willd.) Pers. (Lotus) PLAT ANACEAE (Plane-tree Family) NYCTAGINACEAE (Four-O'clock Family) Platanus occidentalis L. (Sycamore) Mirabilis nyctaginea (Michx.) MacM. (Wild Four-O'Clock) POLEMONIACEAE (Polemonium Family) NYMPHAEACEAE (Water-lily Family) Phlox divaricata L. (Blue Phlox) Brasenia schreberi Gmel. (Purple Water Shield) Phlox paniculata L. (Perennial Phlox) Nuphar luteum (L.) Sibth. & Sm. ssp. variegatum (Engelm.) Beal Phlox pilosa L. (Prairie Phlox) (Yellow Water-lily) Polemonium reptans L. (Jacob's ladder) Nymphaea tuberosa Paine (White Water-lily) POL YGALACEAE (Milkwort Family) OLEACEAE (Olive Family) ! !Polygala incarnata L. (Pink Milkwort) Fraxinus americana L. (White Ash) ! !Polygala polygama Walt. (Purple Milkwort) Fraxinus nigra Marsh. (Black Ash) Polygala sanquinea L. (Field Milkwort) Fraxinus pennsylvanica Marsh. var. subintegerrima (Yahl) Fem. (Green Ash) Polygala senega L. (Seneca-snakeroot) Polygala verticillata L. (Whorled Milkwort) *Syringa vulgaris L. (Common Lilac) POL YGONACEAE (Buckwheat Family) ONAGRACEAE (Evening-Primrose Family) Polygonella articulata (L.) Meissn. (Jointweed) Circaea alpina L. (Small Enchanter's Nightshade) Polygonum achoreum Blake (Erect Knotweed) Circaea lutetiana L. ssp. canadensis (L.) Asch. & Magnus (Enchant- Polygonum amphibium L. (Water Smartweed) er's Nightshade) *Polygonum arenastrum Jord. (Knotweed) Epilobium adenocaulon Haussk. (Northern Willow Herb) Polygonum coccineum Muhl. (Water Smartweed) Epilobium angustifolium L. (Fireweed) *Polygonum convolvulus L. (Black Bindweed) Epilobium coloratum Biehler (Cinnamon Willow Herb) *Polygonum cuspidatum Sieb. & Zucc. (Japanese Bamboo) Gaura biennis L. (Biennial Gaura) !!Polygonum douglasii Greene (Douglas' Knotweed) Ludwigia polycarpa Short & Peter (False Loosestrife) Polygonum hydropiper L. (Common Smartweed) Oenothera biennis L. (Evening Primrose) Polygonum hydropiperoides Michx. (Mild Water Pepper) Oenothera parviflora L. (Small-flowered Evening Primrose) Polygonum lapathifolium L. (Pale Smartweed) Oenothera rhombipetala Nutt. (Sand Primrose) Polygonum pensylvanicum L. (Pinkweed) Oenothera serrulata Nutt. (Toothed Evening Primrose) *Polygonum persicaria L. (Lady's-thumb) Oenothera strigosa (Rydb.) Mackenz. & Bush (Hairy Evening Prim­ rose) Polygonum punctatum Ell. (Knotweed) Polygonum ramosissimum Michx. (Bushy Knotweed) (Broom-rape Family) Polygonum sagittatum L. (Arrow-leaved Tearthumb) ! !Conopholus americana (L.) Wallr. (Squawroot) Polygonum scandens L. (Climbing False Buckwheat) ! ! fasciculata Nutt. (Broom-rape) Polygonum tenue Michx. (Slender Knotweed) Orobanche uniflora L. (Cancer-root) Polygonum virginianum L. (Jumpseed) OXALIDACEAE (Wood-sorrel Family) *Rumex acetosella L. (Sheep-sorrel) Oxalis stricta L. (Yellow Wood-sorrel) Rumex altissimus Wood (Pale Dock) Oxalis violaceae L. (Violet Wood-sorrel) *Rumex crispus L. (Curly Dock) https://scholarworks.uni.edu/pias/vol87/iss2/8 8 Peck et al.: A Checklist of the Vascular Flora of Allamakee County, Iowa

70 PROC. IOWA ACAD. SCI. 87 (1980)

Rumex mexicanus Meissn. (Dock) Ranunculus rhomboideus Goldie (Prairie Buttercup) *Rumex obtusifolius L. (Bitter Dock) Ranunculus sceleratus L. (Cursed Crowfoot) Rumex orbiculatus Gray (Great Water Dock) Ranunculus septentrionalis Poir. (Swamp Buttercup) *Rumex patientia L. (Patience Dock) Thalictrum dasycarpum Fisch. & Ave-Lall. (Purple Meadow-rue) Rumex verticillatus L. (Swamp Dock) Thalictrum dioicum L. (Early Meadow-rue)

PORTULACACEAE (Purslane Family) RHAMNACEAE (Buckthom Family) Claytonia virginica L. (Spring Beauty) Ceanothus americanus L. ( Tea) *Portulaca oleracea L. (Common Purslane) Ceanothus herbaceus Raf. (Redroot) ! !Talinum rugospermum Holz. (Fame Flower) Rhamnus alnifolia L'Her. (Buckthom) *Rhamnus cathartica L. (Common Buckthom) PRIMULACEAE (Primrose Family) Androsaceae occidentalis Pursh. (Western Rock Jasmine) ROSACEAE (Rose Family) Dodecatheon meadia L. (Prairie Shooting-star) Agrimonia gryposepala Wallr. (Agrimony) Dodecatheon radicatum Greene (Jeweled Shooting-star) Agrimonia pubescens Wallr. (Downy Agrimony) Lysimachia ciliata L. (Fringed Loosestrife) Agrimonia striata Michx. (Agrimony) Lysimachia hybrida Michx. (Loosestrife) Ame/anchier arborea (Michx. f.) Fem (Shadbush) *Lysimachia nummularia L. (Moneywort) Amelanchier humilus Wieg. (Low Shadbush) Lysimachia quadrifolia L. (Whorled Loosestrife) Amelanchier laevis Wieg. (Smooth Shadbush) Lysimachia terrestris (L.) BSP (Swamp Candle) Amelanchier sanguinea (Pursh) DC. (Red Shadbush) Lysimachia thyrsiflora L. (Tufted Loosestrife) Amelanchier spicata (Lam.) K. Koch (Low Shadbush) PYROLACEAE (Wintergreen Family) Crataegus calpodendron (Ehrh.) Medic. (Um-tree Hawthorn) ! !Chimaphila umbellata (L.) Bart. (Pipsissewa) Crataegus coccinea L. (Hawthorn) Pyrola elliptica Nutt. (Shinleaf) Crataegus crus-galli L. (Cockspur Hawthorn) ! !Pyrola secunda L. (One-sided Shinleaf Crataegus margaretta Ashe (Margaret's Hawthorn) Crataegus mollis (T. & G.) Scheele (Red Hawthorn) RANUNCULACEAE (Crowfoot Family) ! ! noveboracense Gray (Monkshood) Crataegus punctata Jacq. (Dotted Hawthorn) pachypoda Ell. (White Baneberry) Crataegus succulenta Link. (Succulent Hawthorn) Actaea rubra (Ait.) Willd. (Red Baneberry) Fragaria vesca L. var. americana Porter (Woodland Strawberry) Anemone canadensis L. (Meadow Anemone) Fragaria virginiana Dene. (Wild Strawberry) Anemone cylindrica Gray (Thimbleweed) Geum aleppicum Jacq. (Yellow Avens) Anemone patens L. (Pasque Flower) Geum canadense Jacq. (White Avens) Anemone quinquefolia L. (Wood Anemone) Geum laciniatum Murr. (Rough Avens) Anemone virginiana L. (Thimbleweed) Geum triflorum Pursh (Prairie-smoke) Anemone/la thalictroides (L.) Spach (Rue-anemone) Physocarpus opulifolius (L.) Maxim. (Ninebark) Aquilegia canadensis L. (Wild Columbine) *Potentilla argentea L. (Silvery Cinquefoil) Caltha palustris L. (Marsh Marigold) Potentilla arguta Pursh (Tall Cinquefoil) Clematis verticillaris DC. (Purple Clematis) Potentilla fruticosa L. (Shrubby Cinquefoil) Clematis virginiana L. (Virgin's-bower) Potentilla norvegica L. (Rough Cinquefoil) Hepatica acutiloba DC. (Liverleaf) *Potentilla recta L. (Sulfur Cinquefoil) !Hydrastis canadensis L. (Golden-seal) Potentilla simplex Michx. (Old-field Cinquefoil) lsopyrum biternatum (Raf.) T. & G. (False Rue-anemone) !Potentilla tridentata Ait. (Three-toothed Cinquefoil) Ranunculus abortivus L. (Kidneyleaf Buttercup) Prunus americana Marsh. (Wild Plum) *Ranunculus acris L. (Tall Buttercup) !Prunus nigra Ait. (Canada Plum) Ranunculus aquatilis L. var. capillaceus (Thuill.) DC. (White Water- Prunus pensylvanica L. f. (Pin-cherry) crowfoot) Prumus pumila L. (Sand Cherry) Ranunculus circinatus Sibth. (White Water-crowfoot) Prunus serotina Ehrh. (Black Cherry) Ranunculus flabellaris Raf. (Yellow Water-crowfoot) Prunus virginiana L. (Choke Cherry) Ranunculus longirostris Godr. (White Water-crowfoot) Pyrus ioensis (Wood) Bailey (Wild Crabapple) Ranunculus pensylvanicus L.f. (Bristly Crowfoot) *Pyrus /us L. (Cultivated Apple) Ranunculus recurvatus Poir. (Hooked Buttercup) !!Rosa acicularis Lindi. (Prickly Wild Rose)

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Rosa arkansana Porter (Pasteur Wild Rose) SAXIFRAGACEAE (Saxifrage Family) Rosa blanda Ait. (Smooth Wild Rose) ! ! Rydb. (Golden Saxifrage) Rosa carolina L. (Sunshine Wild Rose) Heuchera richardsonii R. Br. (Alumroot) Rosa X rudiuscula Greene (R. arkansana X R. carolina) Mitella diphylla L. (Bishop's-cap) Rubus allegheniensis Porter (Common Blackberry) Penthorum sedoides L. (Ditch-stonecrop) Rubus flagellaris L. (Northern Dewberry) Ribes americanum Mill. (Wild Black Currant) *Rubus idaeus L. (Cultivated Red Raspberry) Ribes cynosbati L. (Prickly Gooseberry) Rubus occidentalis L. (Black Raspberry) Ribes missouriense Nutt. (Missouri Gooseberry) Rubus pubescens Raf. (Dwarf Raspberry) Saxifraga pensylvanica L. (Swamp Saxifrage) Rubus strigosus Michx. (Red Raspberry) !Sullivantia renifolia Rosendahl (Sullivantia) *Sorbaria sorbifolia (L.) A. Br. (False Spiraea) SCROPHULARIACEAE (Figwort Family) *Sorbus aucuparia L. (European Mountain-ash) Aureolaria grandijlora (Benth.) Pennell (False Foxglove) Spira alba Du Roil (Meadow Sweet) Castilleja sessilifora Pursh (Downy Painted-cup) . Chelone glabra L. (Turtlehead) RUBIACEAE (Madder Family) Cephalanthus occidentalis L. (Buttonbush) Dasistoma macrophylla (Nutt.) Raf. (Mullein Foxglove) Galium aparine L. (Spring-cleavers) Gerardia aspera Dougl. (Harsh Gerardia) Galium asprellum Michx. (Rough Bedstraw) ! !Gerardia skinneriana Wood (False Foxglove) Galium boreale L. (Northern Bedstraw) Gerardia tenuifolia Yahl. (Slender False Foxglove) Galium circaezans Michx. (Wild Licorice) Gratiola neglecta Torr. (Hedge Hyssop) Galium concinnum T. & G. (Shining Bedstraw) Linaria canadensis (L.) Dumont (Old-field Toadflax) Galium obtusum Bigel. (Wild Madder) *Linaria vulgaris Hill (Butter-and-eggs) Galium tinctorium L. (Stiff Bedstraw) Lindernia dubia (L.) Pennell (False Pimpernel) Galium trifidum L. (Small Bedstraw) Mimulus ringens L. (Alleghany Monkey Flower) Galium trijlorum Michx. (Sweet-scented Bedstraw) Pedicularis canadensis L. (Common Lousewort) Pedicularis lanceolata Michx. (Swamp Wood Betony) RUTACEAE (Rue Family) Scrophularia lanceolata Pursh (Early Figwort) Ptelea trifoliata L. (Wafer-ash) Scrophularia marilandica L. (Late Figwort) Zanthoxylum americanum Mill. (Northern Prickly-ash) *Verbascum thapsus L. (Common Mullein) SALICACEAE (Willow Family) !!Veronica americana (Raf.) Schw. (American Brookline) *Populus alba L. (Silver-leaved Poplar) Veronica anagallis-aquatica L. (Water Speedwell) Populus balsamifera L. (Balsam Poplar) *Veronica arvensis L. (Corn Speedwell) Populus deltoides Marsh. (Cottonwood) Veronica peregrina L. (Purslane Speedwell) Populus grandidentata Michx. (Big-toothed Aspen) *Veronica serpyllifolia L. (Thyme-leaved Speedwell) Populus tremuloides Michx. (Quaking Aspen) Veronicastrum virginicum (L.) Farw. (Culver's-root) Salix alba L. (White Willow) Salix amygdaloides Anderss. (Peach-leaved Willow) SOLANACEAE (Nightshade Family) *Datura stramonium L. (Jimsonweed) *Salix babylonica L. (Weeping Willow) *Nicandra physalodes (L.) Gaertn. (Apple-of-Peru) Salix bebbiana Sarg. (Long-beaked Willow) Physalis heterophylla Nees (Ground-cherry) Salix cordata Michx. (Heart-leaved Willow) Physalis longifolia Nutt. (Ground-cherry) Salix discolor Muhl. (Large Pussy-willow) Physalis virginiana Mill. (Ground-cherry) *Salix fragilis L. (Crack Willow) *Solanum carolinense L. (Horse-nettle) Salix humilus Marsh. (Prairie Willow) *Solanum nigrum L. (Black Nightshade) Salix interior Rowlee (Sandbar Willow) Solanum rostratum Dunal. (Buffalo-bur) ! !Salix lucida Muhl. (Shining Willow) Salix nigra L. (Black Willow) ST APHYLEACEAE (Bladdernut Family) Salix petiolaris Sm. (Petioled Willow) Staphylea trifolia L. (Bladdernut) Salix rigida Muhl. (Heart-leaved Willow) THYMELAEACEAE (Mezereum Family) Salix sericea Marsh. (Silky Willow) Dirca palustris L. (Leatherwood) SANT ALACEAE (Sandalwood Family) TILIACEAE (Linden Family) Comandra umbellata (L.) Nutt. (Bastard Toadflax) Tilia americana L. (Basswood) https://scholarworks.uni.edu/pias/vol87/iss2/8 10 Peck et al.: A Checklist of the Vascular Flora of Allamakee County, Iowa

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ULMACEAE (Elm Family) Sagittaria engelmanniana J .G. Smith (Arrowhead) Ce/tis occidentalis L. (Hackberry) Sagittaria latifolia Willd. (Common Arrowhead) Ulmus americana L. (American Elm) AMARYLLIDACEAE (Amaryllis Family) *Ulmus pumila L. (Siberian Elm) Hypoxis hirsuta (L.) Cov. (Yellow Stargrass) Ulmus rubra Muhl. (Slippery Elm) Ulmus thomasi Sarg. (Cork Elm) ARACEAE (Arum Family) Acorus calamus L. (Sweet Flag) URTICACEAE (Nettle Family) Arisaema dracontium (L.) Schott (Green Dragon) Boehmeria cylindrica (L.) Sw. (Bog-hemp) Arisaema triphyllum (L.) Schott (Jack-in-the-Pulpit) Laportea canadensis (L.) Wedd. (Wood Nettle) (L.) Nutt. (Skunk-cabbage) Parietaria pensylvanica Muhl. (Pellitory) Pi/ea fontana (Lune!!) Rydb. (Firm Clearweed) COMMELINACEAE (Spiderwort Family) Tradescantia bracteata Small (Prairie Spiderwort) Pi/ea pumila (L.) Gray (Clearweed) Tradescantia ohioensis Raf. (Common Spiderwort) Urtica dioica L. (Stinging Nettle) (Sedge Family) V ALERIANACEAE (Valerian Family) abdita Bickn. (Hidden Sedge) !Valeriana ciliata T. & G. (Valerian) ! !Carex aggregata Mackenz. (Glomerate Sedge) VERBENACEAE (Vervain Family) Carex albursina Sheldon (Sedge) Lippia lanceolata Michx. (Fog-fruit) Carex alopecoidea Tuckerm. (Tawny Sedge) Verbena bracteata Lag. & Rodr. (Bracted Vervain) Carex amphibola Steud. var. turgida Fem. (Narrowleaf Sedge) Verbena hastata L. (Blue Vervain) Carex atherodes Spreng. (Slough Sedge) Verbena simplex Lehm. (Narrow-leaved Vervain) Carex backii Boott (Back's Sedge) Verbena stricta Vent. (Hoary Vervain) Carex bicknellii Britt (Bicknell 's Sedge) Verbena urticifolia L. (White Vervain) Carex blanda Dewey (Woodland Sedge) Verbena X deamii Moldenke (V. bracteata XV. stricta) Carex brevior (Dewey) Mackenz. (Fescue Sedge) VIOLACEAE (Violet Family) !Carex careyana Torr. (Carey's Sedge) !!Hybanthus concolor (T.F. Forst.) Spreng. (Green Violet) Carex cephaloidea (Dewey) Carey (Sedge) Viola incognita Brainerd (White Violet) Carex cephalophora Muhl. (Woodbank Sedge) Viola macloskeyi Lloyd subsp. pa/lens (Banks) Baker (Smooth White Carex communis Bailey (Colonial Sedge) Violet) Carex convoluta Mackenz. (Sedge) Viola missouriensis Greene (Missouri Violet) Carex cristatella Britt. (Dense-flowered Sedge) Viola nephrophylla Greene (Northern Blue Violet) Carex deweyana Schw. (Dewey's Sedge) Viola pedata L. (Bird's-foot Violet) Carex eburnea Boott (Ivory Sedge) Viola pedatifida G. Don (Prairie Violet) Carex gracillima Schw. (Graceful Sedge) Viola pratincola Greene (Common Blue Violet) Carex granularis Muhl. (Meadow Sedge) Viola pubescens Ait. (Smooth Yellow Violet) Carex gravida Bailey (Heavy Sedge) Viola renifolia Gray (Kidney-leaved Violet) Carex grayii Carey (Gray's Sedge) Viola rugulosa Greene (White Violet) Carex haydenii Dewey (Hayden's Sedge) Viola sororia Willd. (Downy Blue Violet) Carex hirtifolia Mackenz. (Hairy-leaved Sedge) Viola pedatifida X V. pratincola Carex hitchcockiana Dewey (Hitchcock's Sedge) VIT ACEAE (Grape Family) Carex hystericina Muhl. (Porcupine Sedge) Parthenocissus quinquefolia (L.) Planch. ( Creeper) Carex interior Bailey (Inland Sedge) Parthenocissus vitacea (Knerr) Hitchc. (Woodbine) Carex jamesii Schw. (James' Sedge) ! !Vitis aestivalis Michx. (Summer Grape) Carex laeviconica Dewey (Smoothcone Sedge) Vitis riparia Michx. (River-bank Grape) Carex lasiocarpa Ehrh. (Woolly Sedge) Carex laxiculmis Schw. (Slender Sedge) Carex lupulina Muhl. (Hop Sedge) MAGNOLIOPHYTA: LILIATAE Carex molesta Mackenz. (Sedge) ALISMAT ACEAE (Water-plaintain Family) Carex muhlenbergii Schk. (Muhlenberg's Sedge) Alisma subcordatum Raf. (Water-plantain) Carex muskingumensis Schw. (Sedge) Sagittaria cuneata Sheldon (Arrowhead) Carex normalis Mackenzie (Sedge)

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Carex oligocarpa Schk. (Few-fruited Sedge) Juncus tenuis Willd. (Path Rush) Carex peckii E.C. Howe (Peck's Sedge) Luzula acuminata Raf. (Wood Rush) Carex pedunculata Muhl. (Peduncled Sedge) Luzula campestris (L.) DC. (Wood Rush) Carex pensylvanica Lam. ( Sedge) LEMNACEAE (Duckweed Family) Carex projecta Mackenz. (Sedge) Lemna minor L. (Duckweed) Carex retrorsa Schw. (Reflexed Sedge) Lemna trisulca L. (Star Duckweed) Carex rosea Schk. (Sedge) Spirodela polyrhiza (L.) Schleid. (Water-flaxseed) Carex rostrata Stokes var. utriculata (Boot) Bailey (Beaked Sedge) Wolffia columbiana Karst. (Water-meal) Carex scoparia Schk. (Broom Sedge) LILIACEAE (Lily Family) Carex sparganioides Muhl. (Bur-like Sedge) Allium canadense L. (Wild Garlic) Carex sprengelii Dewey (Sprengel 's Sedge) ! '!Alli um cernuum Roth (Nodding Wild Onion) Carex stipata Muhl. (Saw-beak Sedge) Allium tricoccum Ait. (Wild Leek) Carex stricta Lam. (Tussock Sedge) *Asparagus officinalis L. (Garden Asparagus) Carex tenera Dewey (Slender Sedge) Erythronium albidum Nutt. (White Trout Lily) !!Carex tonsa (Fem.) Bickn. (Deep Green Sedge) !!Erythronium americanum Ker. (Yellow Trout City) Carex tribuloides Wahl. (Angled Sedge) *Hemerocallis fulva L. (Day Lily) Carex trichocarpa Muhl. (Hairy-fruited Sedge) Lilium canadense L. (Wild Yellow Lilly) Carex typhina Michx. (Cat-tail Sedge) Lilium michiganense Farw. (Turk's Cap Lily) Carex vulpinoidea Michx. (Foxtail Sedge) Lilium philadelphicum L. (Wood Lily) Carex woodii Dewey (Wood's Sedge) Maianthemum canadense Desf. (Wild Lily-of-the-valley) Cyperus aristatus Rottb. (Sedge) Polygonatum bijlorum (Walt.) Ell. (Solomon's Seal) Cyperus engelmanni Steud. (Engelmann 's Sedge) Polygonatum pubsecens (Willd.) Pursh (Small Solomon's Seal) Cyperus erythrorhiws Muhl. (Red-rooted Sedge) Smilacina racemosa (L.) Desf. (False Solomon's Seal) Cyperus esculentus L. (Yellow Nutsedge) Smilacina stellata (L.) Desf. (Small False Solomon's Seal) Cyperus filiculmis Yahl (Fem Flatsedge) !Streptopus roseus Michx. (Rosy Twisted Stalk) Cyperus rivularis Kunth (Brook Flatsedge) flexipes Raf. (White Trillium) Cyperus schweinitzii Torr. (Schweinitz's Flatsedge) Trillium nivale Riddell (Snow Trillium) Cyperus strigosus L. (False Nutgrass) Uvularia grandijlora Sm. (Large Bellwort) Eleocharis acicularis (L.) R. & S. (Needle Spikerush) Zigadenus Nutt. (White Camass) Eleocharis erythropoda Steud. (Red-footed Spikerush) Eleocharis obtusa (Willd.) Schultes (Blunt Spikerush) NAJADACEAE ( Family) Najas flexilis (Willd.) Rostk. & Schmidt. (Naiad) Scirpus atrovirens Willd. (Dark Green Bulrush) Zannichellia palustris L. (Homed Pondweed) Scirpus cyperinus (L.) Kunth. (Woolgrass) Scirpus fluviatilis (Torr.) Gray (River Bulrush) ORCHIDACEAE (Orchid Family) Scirpus validus Yahl (Soft-stemmed Bulrush) '!A.plectrum hyemale (Muhl.) Torr. (Adam-and-Eve Orchid) Corallorhiza maculata Raf. (Spotted Coral-root Orchid) DIOSCOREACEAE (Yam Family) Cypripedium calceolus L. var. pubescens (Willd.) Correll (Yellow Dioscorea villosa L. (Wild Yam) Lady-slipper Orchid) HYDROCHARITACEAE (Frog's-bit Family) !Cypripedium candidum Muhl. (White Lady-slipper Orchid) Elodea canadensis Michx. (Waterweed) ! !Cypripedium reginae Walt. (Showy Lady-slipper Orchid) Elodea nuttallii (Planch.) St. John (Nuttall 's Waterweed) Goodyera pubescens (Willd.) R. Br. (Downy Rattlesnake-plantain Orchid) ! !Vallisneria americana Michx. (Tape grass) !Habenaria hookeri Torr. (Hooker's Orchid) IRIDACEAE ( Family) !Habenaria psycodes (L.) Spreng. (Small Purple Fringed Orchid) Iris virginica L. (Southern Blue Flag) Habenaria viridis (L.) Br. var. bracteata (Muhl.) Gray (Bracted Or- Sisyrinchium campestre Bickn. (Blue-eyed-grass) chid) JUNCACEAE (Rush Family) Liparis lilifolia (L.) Rich. (Lilia-leaved Twayblade Orchid) Juncus canadensis J. Gay (Canada Rush) Liparis loeselii (L.) Rich. (Yellow Twayblade Orchid) Juncus dudleyi Wieg. (Dudley's Rush) Orchis spectablis L. (Showy Orchid) !Juncus effusus L. var. solutus Fem. & Wieg. (Bog Rush) Spiranthes cernua (L.) Rich. (Nodding Ladies'-tresses Orchid) Juncus nodosus L. (Knotted Rush) Triphora trianthophora (Sw.) Rydb. (Three Birds Orchid) https://scholarworks.uni.edu/pias/vol87/iss2/8 12 Peck et al.: A Checklist of the Vascular Flora of Allamakee County, Iowa

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POACEAE (Grass Family) Glyceria grandis S. Wats. (Reed Meadow Grass) *Agropyron desertorum (Fisch.) Schult. (Wheat Grass) Glyceria striata (Lam.) Hitchc. (Fowl Meadow Grass) *Agropyron repens (L.) Beauv. (Witch-grass) Hordeum jubatum L. (Squirreltail Grass) Agropyron trachycaulum (Link) Malte (Wheat Grass) Hystrix patula Moench (Bottle-brush Grass) *Agrostis gigantea Roth. (Red Top) Koeleria macrantha (Ledb.) Schultes (June Grass) Agrostis hyemalis (Walt.) BSP (Tickle Grass) Leersia lenticularis Michx. (Catchfly Grass) Agrostis perennans (Walt.) Tuckerm. (Upland Bent Grass) Leersia oryzoides (L.) Sw. (Rice-cutgrass) Leersia virginica *Agrostis stolonifera L. var. stolonifera (L.) Koch (Redtop) Willd. (White Grass) Alopecurus aequalis Sobol. (Foxtail) Leptoloma cognatum (Schult.) Chase (Fall Witch Grass) Andropogon gerardii Vitm. (Tall Blue-stem) Melica nitens Nutt. (Three Flowered Melic Grass) Andropogon scoparius Michx. (Small Blue-stem) Milium effusum L. (Millet-grass) Aristida basiramea Engelm. ex Vasey var. basiramea (Triple-awned *Miscanthus saccharijlorus (Maxim.) Hack. (Plume Grass) Grass) Muhlenbergia mexicana (L.) Trin. (Wirestem Muhly) Aristida oligantha Michx. (Three Awn) Muhlenbergia racemosa (Michx.) BSP (Marsh Muhly) Aristida tuberculosa Nutt. (Needle Grass) Muhlenbergia schreberi Gmel. (Nimble Will) *Avena sativa L. (Cultivated Oats) Muhlenbergia sobolifera (Muhl.) Trin. (Rock Muhly) Bouteloua curtipendula (Michx.) Torr. var. curtipendula (Tall Grama Oryzopsis asperifolia Michx. (Mountain-rice) Grass) ! !Oryzopsis racemosa (Sm.) Ricker (Rice Grass) Bouteloua hirsuta Lag. (Grama Grass) Panicum capillare L. (Old Witch Grass) Brachyelytrum erectum (Schreb.) Beauv. (Bearded Shorthusk) Panicum columbianum Scribn. (Panic Grass) Bromus ciliatus L. (Brome Grass) Panicum commonsianum Ashe var. euchlamydeum (Shinners) Pohl *Bromus inermis Leyss. (Hungarian Brome Grass) (Common 's Panicum) *Bromus japonicus Thunb. (Japanese Chess) Panicum implicatum (Scribn.) Fern. (Woolly Panic Grass) Bromus kalmii Gray (Kalm's Brome Grass) Panicum latifolium L. (Broad-leaved Panic Grass) Bromus latiglumis (Schribn.) Hitch. (Brome Grass) Panicum leibergii (Vasey) Scribn. (Leiberg's Panicum) Bromus pubescens Muhl. (Canada Brome Grass) Panicum meridionale Ashe (Panic Grass) Bromus purgans L. f. incanus Shear (Brome Grass) Panicum perlongum Nash (Elongate Panicum) *Bromus tectorum L. (Downy Chess) Panicum praecocius Hitcht:. & Chase (Early Panicum) Calamagrostis canadensis (Michx.) Beauv. (Blue-joint) Panicum scribnerianum Nash (Small Panic Grass) Cenchrus longispinus (Hack.) Fern. (Sandbur) Panicum virgatum L. (Switch Grass) Cinna arundinacea L. (Wood Reedgrass) Panicum wilcoxianum Vasey (Wilcox Panicum) *Dactylis glomerata L. (Orchard Grass) Paspalum ciliatifolium Michx. (Bead Grass) Danthonia spicata (L.) Beauv. (Poverty Grass) Phalaris arundinacea L. (Reed Canary Grass) *Digitaria ischaemum (Schreb.) Muhl. (Crab Grass) *Phleum pratense L. (Common Timothy) *Digitaria sanguinalis (L.) Scop. (Crabgrass) Phragmites australis (Cav.) Steud. (Reed Grass) *Echinochloa crusgalli (L.) Beauv. (Barnyard Grass) *Poa annua L. (Annual Bluegrass) Echinochloa muricata (Beauv.) Fern. (Barnyard Grass) *Poa compressa L. (Canada Bluegrass) Elymus canadensis L. (Canadian Wild Rye) !!Poa languida Hitchc. (Woodland Bluegrass) Elymus riparius Wieg. (River-bank Wild Rye) Fern. & Wieg. (Marsh Bluegrass) Elymus villosus Muhl. (Slender Wild Rye) Poa palustris L. (Fowl Meadow Grass) Elymus virginicus L. (Terrell Grass) *Poa pratensis L. ( Bluegrass) *Eragrostis cilianensis (All.) Link (Stink Grass) Poa sylvestris Gray (Woodland Bluegrass) Eragrostisfrankii C.A. Mey. var.frankii (Love Grass) *Poa trivia/is L. (Meadow Grass) Eragrostis hypnoides (Lam.) BSP (Pony Grass) Poa wolfii Scribn. (Meadow Bluegrass) Eragrostis pectinacea (Michx.) Nees (Love Grass) Schizachne purpurascens (Torr.) Swallen (False Melic Grass) Eragrostis spectabilis (Pursh) Steud. (Petticoat Climber) *Secale cereale L. (Rye) *Festuca pratensis Huds. (Meadow Fescue) *Setariafaberii Herrm. (Giant Foxtail) Festuca obtusa Biehler (Nodding Fescue) *Setaria glauca (L.) Beauv. (Yellow Foxtail) Festuca octoflora Walt. var. tenella (Willd.) Fern. (Six-weeks Grass) *Setaria viridis (L.) Beauv. (Green Foxtail) *Festuca rubra L. (Red Fescue) Sorghastrum nutans (L.) Nash (Indian Grass)

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Spartina pectinata Link (Slough Grass) REFERENCES Sphenopholus obtusata (Michx.) Scribn. var. major (Torr.) Erdm. (Wedge Grass) CRABBE, J.A., A.C. JERMY, and J.T. MICKEL. 1975. A new generic sequence for the pteridophyte herbarium. Fern Gaz. 11: 141-162. Sphenopholus obtusata (Michx.) Scribn. var. obtusata (Prairie Wedge CRAWFORD, D.J. 1970. The Umbelliferae of Iowa. Univ. Iowa Stud. Nat. Grass) Hist. 21(4): 1-36. Sporobolus asper (Michx.) Kunth (Dropseed) CRONQUIST, A. C. 1968. The evolution and classification of flowering plants. Houghton-Mifflin Co., Boston. Sporobolus cryptandrus (Torr.) Gray (Sand Dropseed) EILERS, L.J. 1965. The postglacial phytogeography of the Iowan lobe. Proc. Sporobolus heterolepis Gray (Northern Dropseed) Iowa Acad. Sci. 72:84-98. EILERS, L.J. 1975. History of studies on the Iowa vascular flora. Proc. Iowa Sporobolus neglectus Nash (Sheathed Dropseed) Acad. Sci. 83:59-64. Sporobolus vaginijlorus (Torr.) Woods (Poverty Grass) FERNALD, M.L. 1950. Gray's manual of botany. 8th Ed. American Book Co., . Stipa spartea Trin. (Porcupine Grass) FITZPATRICK, T.J. 1899. Notes on the flora of northeastern Iowa. Proc. Iowa Tridens flavus (L.) Hitchc. (Purpletop) Acad. Sci. 5:107-133. *Zea mays L. (Cultivated Corn) GLEASON, H .A. , and A. C. CRONQUIST. 1963. Manual of vascular plants of northeastern United States and adjacent Canada. Van Nostrand, New York. !Zizania aquatica L. var. aquatica (Wild Rice) HAGGE, H.P. 1929. Flora of northeastern Iowa and southeastern Wisconsin. M.S. thesis, Iowa State University, Ames, Iowa. PONTEDERIACEAE (Pickerel-weed Family) HARTLEY, T.G. 1960. Plant communities of the La Crosse area in western Heteranthera dubia (Jacq.) MacM. (Water Star-grass) Wisconsin. Proc. Iowa Acad. Sci. 67:174-188. HARTLEY, T.G. 1962. The flora of the "Driftless Area." Ph.D. thesis, POTAMOGETONACEAE (Pondweed Family) University of Iowa, Iowa City, Iowa. Potamogeton berchtoldii Fieber (Berchtold 's Pondweed) HARTLEY, T.G. 1966. The flora of the "Driftless Area." Univ. Iowa Stud. Nat. Hist. 21(1):1-174. *Potamogeton crispus L. (Crimped Pondweed) HAYDEN, A. 1940. A supplement to the catalogue of Iowa plants in the Iowa Potamogeton foliosus Raf. (Leafy Pondweed) State College herbarium. Iowa St. Coll. J. Sci. 14:199-214. HAYDEN, A. 1945. A second supplement to the catalogue of Iowa plants in the Potamogeton nodosus Poir. (Long-leaved Pondweed) Iowa State College herbarium. Iowa St. Coll. J. Sci. 19:111-132. Potamogeton pectinatus L. (Sago Pondweed) MOHLENBROCK, R.H. 1975. Guide to the vascular flora of Illinois. Southern Potamogeton richardsonii (Benn.) Rydb. (Red-head Pondweed) Illinois University Press, Carbondale, Illinois. NIEMANN, D.A. 1975. Distribution and habitats of the orchids of Iowa. Ph.D. Potamogeton zosteriformis Fern. (Flat-stem Pondweed) dissertation, Iowa State University, Ames, Iowa. PAMMEL, L.H. 1891. Forest vegetation of the Upper Mississippi. Proc. Iowa SMILICACEAE (Greenbrier Family) Acad. Sci. 1:80-86. Smilax ecirrhata (Engelm.) Wats. (Greenbrier) PAMMEL, L.H. 1905. A comparative study of the vegetation of swamp, clay, Smilax herbacea L. (Carrion-flower) and sandstone areas in western Wisconsin, southeastern Minnesota, and northeastern, central and southwestern Iowa. Proc. Davenport Acad. Nat. Smilax hispida Muhl. (Catbrier) Sci. 10:32-126. PAMMEL, L.H., and C.M. King. 1901. The vascular cryptogams oflowa and SPARGANIACEAE (Bur-reed Family) the adjoining parts of southeastern Minnesota and western Wisconsin. Proc. Sparganium eurycarpum Engelm. (Bur-reed) Iowa Acad. Sci. 9:134-151. PECK, J.H. 1976. The pteridophyte flora of Iowa. Proc. Iowa Acad. Sci. TYPHACEAE 84:143-160. Typha angustifolia L. (Narrow-leaved Cat-tail) POHL, R.W. 1966. The grasses of Iowa. Iowa St. J. Sci. 40:341-573. PRIOR, J.C. 1976. A regional guide to Iowa landforms. Iowa Geo!. Surv. Ed. Typha latifolia L. (Common Cat-tail) Ser. 3. Typha X glauca Godr. (T. angustifolia X T. latifolia) ROOSA, D.M., and L.J. EILERS. 1978. Endangered and threatened Iowa vascular plants. Spec. Rept. No. 5., State Preserves Advisory Board, SUMMARY OF CHECKLIST Conservation Commission, Des Moines, Iowa. SCHOLTES, W.H., and G.A. SWENSON, 1958. Soil Service of Allamakee 124 Families County, Iowa. U.S. Dept. Agr., Soil Cons. Serv., Soil Survey Ser. 1939, No. 29. 444 Genera SHIMEK, B. 1924. The prairie of the Mississippi River bluffs. Proc. Iowa 1040 Taxa (species plus hybrids) Acad. Sci. 31:205-212. THORNE, R.F. 1953. Notes on rare Iowa plants. Proc. Iowa Acad. Sci. ACKNOWLEDGEMENTS 60:260-274. THORNE, R.F. 1955. Flora of Johnson County, Iowa. Proc. Iowa Acad. Sci. We thank the Iowa State Preserves Advisory Board for logistic 62: 155-196. support during the foray in 1978. We are grateful to the curators of the THORNE, R.F. 1956. Notes on rare Iowa plants - II. Proc. Iowa Acad. Sci. herbaria cited in the report for their assistance in inspecting specimens. 63:214-227. TOLSTEAD, W.L. 1938. A flora of Winneshiek and Allamakee counties and Three people who aided in field or herbarium work warrant special Clayton County in the vicinity of McGregor. Iowa St. Coll. J. Sci. 12:321- mention: Donald Farrar, Darwin Koenig, and Carol Peck. We welcome 384. information on any additions to the flora.

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