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Botanical Studies Open Educational Resources and Data

2017

Vascular of the Horse Mountain Serpentines Humboldt County,

James P. Smith Jr Humboldt State University, [email protected]

John O. Sawyer Jr. Humboldt State University

Follow this and additional works at: https://digitalcommons.humboldt.edu/botany_jps

Part of the Botany Commons

Recommended Citation Smith, James P. Jr and Sawyer, John O. Jr., "Vascular Plants of the Horse Mountain Serpentines Humboldt County, California" (2017). Botanical Studies. 51. https://digitalcommons.humboldt.edu/botany_jps/51

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VASCULAR PLANTS OF THE HORSE MOUNTAIN SERPENTINES HUMBOLDT COUNTY, CALIFORNIA

Compiled by James P. Smith, Jr. & John O. Sawyer, Jr. Department of Biological Sciences Humboldt State University

Second Edition • 26 May 2009

Horse Mountain (elevation 4952 ft.) is located at N BERBERIDACEAE • BARBERRY 40.874, W -123.73. The closest town is Willow Creek, Achlys triphylla Vanilla about 15 miles to the northeast. Access is via County Mahonia aquifolium -grape Road 1 (Titlow Hill Road) off State Route 299. About Mahonia nervosa Oregon-grape Vancouveria planipetala Inside-out 1100 acres have been set aside as the Horse Mountain Botanical Area, administered by the Six Rivers National BETULACEAE • BIRCH . Corylus cornuta var. californica California hazel

LYCOPHYTES & FERNS BORAGINACEAE • BORAGE Cryptantha torreyana Torrey’s cryptantha Adianum pedatum var. aleuticum Maidenhair fern Aspidotis densa Indian’s dream CAMPANULACEAE • BELLFLOWER Athryium filix-femina Lady fern Asyneuma prenanthoides California harebell Cheilanthes gracillima Lace fern Campanula scouleri Scouler’s harebell Cryptogramma achrostichoides Parsley fern Polystichum munitum Sword fern CAPRIFOLIACEAE • HONEYSUCKLE Pteridium aquilinum var. pubescens Bracken fern Symphoricarpos mollis Creeping snowberry Selaginella wallacei Wallace’s spike-moss CARYOPHYLLACEAE • PINK Arenaria macrophylla Big-leaved sandwort Abies concolor White fir Minuartia nuttallii ssp. gregaria Nuttall’s sandwort Calocedrus decurrens Incense-cedar Moehringia macrophylla Large-leaved sandwort Chamaecyparis lawsoniana Port Orford-cedar Pseudostellaria jamesiana Sticky sandwort Pinus attenuata Knobcone pine Silene californica California Indian pink Pinus jeffreyi Jeffrey pine Silene campanulata ssp. glandulosa Mountain catchfly Pinus lambertiana Sugar pine Silene laciniata ssp. californica California Indian pink Pinus monticola Stellaria nitens Shining chickweed Ponderosa pine Pseudotsuga menziesii Douglas-fir COMPOSITAE () • SUNFLOWER Achillea millefolium Yarrow FLOWERING PLANTS Agoseris heterophylla var. heterophylla Annual agoseris luzuloides Woodrush pussy-toes ACERACEAE • MAPLE Antennaria suffrutescens Evergreen pusseytoes Acer glabrum var. torreyi Torrey’s maple Arnica cernua Nodding arnica Acer macrophyllum Big-leaf maple Arnica discoidea Rayless arnica greenei Greene’s tassel flower APOCYNACEAE • DOGBANE Chaenactis douglasii var. douglasii Dusty maidens Apocynum androsaemifolium Mountain-hemp Cirsium arvense Canada thistle Cirsium douglasii var. breweri Brewer’s thistle • Cirsium douglasii var. douglasii Swamp thistle Aralia californica California spikenard Cirsium occidentale var. venustum Venus thistle Crepis acuminata Long-leaved hawk’s-beard • DUTCHMAN’S PIPE Crepis pleurocarpa Naked-stemmed hawk’s-beard caudatum Long-tailed wild Ericameria nauseosa var. Rubber rabbit brush Asarum hartwegii Hartweg’s wild ginger Eriophyllum lanatum var. lanceolatum Woolly-sunflower

-1- Hemizonella minima Miniature tarweed Garrya elliptica Coast silk-tassel Hieracium albiflorum White-flowered hawkweed Hieracium bolanderi Bolander’s hawkweed GENTIANACEAE • GENTIAN Madia elegans Common madia Gentiana calycosa Explorer’s gentian Madia gracilis Slender tarweed Microseris laciniata ssp. leptosepala Slender silverpuffs GRAMINEAE () • GRASS Microseris nutans Nodding silverpuffs Agrostis oregonensis Oregon redtop Symphyotrichum spathulatum Western mountain-aster Bromus carinatus California brome Wyethia angustifolia Narrow-leaved mule’s-ear Bromus tectorum Downy brome Wyethia longicaulis Humboldt County mule’s-ears Calamagrostis koelerioides Tufted pine grass Calamagrostis ophitidis Serpentine reed grass CONVOLVULACEAE • MORNING GLORY Dactylis glomerata Orchard grass Calystegia occidentalis ssp. occidentalis Morning glory Danthonia unispicata One-spiked oat grass Elymus glaucus Blue wild-rye CORNACEAE • DOGWOOD Elymus multisetus Big squirrel-tail Cornus nuttallii Nuttall’s dogwood Elymus x hansenii Hansen’s squirrel-tail Festuca californica ssp. californica California fescue CRASSULACEAE • STONECROP Festuca idahoensis fescue Sedum laxum ssp. flavidum Pale-yellow stonecrop Festuca rubra Red fescue Sedum laxum ssp. heckneri Heckner’s stonecrop Melica geyeri Geyer’s onion grass Sedum obtusatum ssp. retusum Sierra stonecrop Melica harfordii Harford’s melic Sedum spathulifolium Broad-leaved stonecrop Phleum alpinum Alpine timothy Phleum pratense Timothy CRUCIFERAE (BRASSICACEAE) • MUSTARD Poa pringlei Pringle’s blue grass Cardamine nuttallii Nuttall’s toothwort Polypogon sp. Beard grass Erysimum capitatum Western wallflower Stipa lemmonii Lemmon’s needle grass Streptanthus tortuosus Mountain jewel flower GROSSULARIACEAE • GOOSEBERRY CYPERACEAE • SEDGE lobbii Gummy gooseberry Carex athrostachya Slender-beaked sedge Ribes sanguineum Red-flowered currant Carex concinnoides Northwestern sedge Ribes velutinum Plateau gooseberry Carex echinata Star sedge Carex geyeri Elk sedge HYDRANGEACEAE • HYDRANGEA Carex mendocinensis Mendocino sedge Philadelphus lewisii Lewis’ mock-orange Carex multicostata Many-ribbed sedge Whipplea modesta Yerba de selva Carex serratodens Saw-toothed sedge Carex subfusca Rusty sedge HYDROPHYLLACEAE • WATER-LEAF Hydrophyllum occidentale Western waterleaf ERICACEAE • HEATH Nemophila menziesii White-flowered baby blue-eyes Allotropa virgata Sugar stick Phacelia corymbosa Serpentine phacelia Arbutus menziesii Madrone Phacelia mutabilis Changeable phacelia Arctostaphylos canescens sonomensis Hoary manzanita Arctostaphylos glandulosa ssp. g. Eastwood’s manzanita HYPERICACEAE • ST. JOHN’S WORT Arctostaphylos nevadensis Pinemat manzanita scouleri Scouler’s Klamath weed Arctostaphylos patula Green leaf manzanita Chimaphila umbellata var. occidentalis Western prince’s-pine • Gaultheria ovatifolia Oregon spicu wintergreen Slender-tubed iris Gaultheria shallon Salal Purdy’s iris Pityopus californica California pinefoot Long-tubed iris Pterospora andromedea Pine drops bellum California blue-eyed-grass Pyrola picta White-veined wintergreen Rhododendron occidentale Western azalea JUNCACEAE • RUSH Vaccinium parvifolium Red huckleberry Juncus ensifolius Dagger-leaved rush Luzula comosa Wood rush • OAK OR BEECH Chinquapin LABIATAE () • MINT Notholithocarpus densiflorus Tanoak odoratissima ssp. glauca Pale monardella Quercus chrysolepis var. chrysolepis live oak Scutellaria antirrhninoides Snapdragon skullcap Quercus chrysolepis var. nana Dwarf canyon live oak Stachys rigida Rough hedge-nettle Quercus vacciniifolia Huckleberry oak LEGUMINOSAE (FABACEAE) • LEGUME GARRYACEAE • SILK-TASSEL Lathyrus sp. Sweet pea Garrya buxifolia Dwarf silk-tassel Lotus crassifolius Broad-leaved trefoil

-2- Lotus denticulatus Toothed trefoil Navarretia linearifolia ssp. l. Alva Day’s pincushion Lotus humistratus Foothill trefoil diffusa Spreading phlox Lotus oblongifolius Narrow-leaved trefoil Phlox douglasii Tufted phlox Lupinus albicaulis Pine lupine Lupinus adsurgens Silky lupine PORTULACACEAE • PURSLANE Trifolium longipes ssp. hansenii Hansen’s Claytonia lanceolata Western spring beauty Claytonia perfoliata Miner’s-lettuce LILIACEAE • LILY Claytonia saxosa Brandegee’s spring beauty Allium falcifolium Scythe-leaved onion Allium siskiyouense Siskiyou onion PRIMULACEAE • PRIMROSE Broaiaea elegans ssp. elegans Harvest onion Dodecatheon hendersonii Henderson’s shooting star Calochortus tolmiei Tolmie’s pussy-ears Trientalis latifolia Broad-leaved star flower Dichelostemma capitatum ssp. capitatum Blue dicks Erythronium californicum California fawn lily RANUNCULACEAE • BUTTERCUP Erythronium grandiflorum var. grandiflorum Glacier lily Anemone quinquefolia var. minor Five-leaved anemone Fritillaria affinis Mission bells Anemone oregana var. oregana Oregon wind flower Fritillaria purdyi Purdy’s fritillaria Aquilegia Crimson columbine Hastingsia alba White rush-lily Delphinium decorum ssp. tracyi Tracy’s larkspur Lilium pardalinum ssp. pardalinum Leopard lily Delphinium trolliifolium Poison larkspur Lilium washingtonianum ssp. purpurascens Shasta lily Ranunculus californicus var. c. California buttercup Maianthemum racemosum False lily-of-the-valley Ranunculus occidentalis Western buttercup Prosartes hookeri Fairy bells Triantha occidentalis ssp. occidentalis Sticky false asphodel • BUCKTHORN Trillium ovatum Pacific trillium cuneatus Buck brush Triteleia laxa Ithuriel’s spear Ceanothus integerrimus Deer brush Xerophyllum tenax Bear-grass Ceanothus pumilus Siskiyou ceanothus Zigadenus paniculatus Death-camas Ceanothus velutinus Tobacco brush, snow bush Frangula californica ssp. californica California coffee bush LIMNANTHACEAE • MEADOW-FOAM Frangula californica ssp. occidentalis California coffee bush Limnanthes douglasii Douglas’ meadow-foam ROSACEAE • ROSE MALVACEAE • MALLOW Amelanchier alnifolia var. alnifolia Western service Sidalcea malachroides Maple-leaved sidalcea Amelanchier alnifolia var. semiintegrifolia Sidalcea malvaeflora Dwarf checkerbloom Western service berry Amelanchier utahensis var. utahensis service berry ONAGRACEAE • EVENING-PRIMROSE Fragaria vesca Wood strawberry Epilobium ciliatum ssp. ciliatum Fringed willow herb Holodiscus discolor Ocean spray, cream bush Epilobium ciliatum ssp. glandulosum Fringed willow herb Prunus emarginata var. emarginata Bitter cherry Epilobium minutum Willow herb Rosa gymnocarpa var. serpentina Gasquet rose Gayophytum diffusum ssp. parviflorum Rosa pisocarpa ssp. pisocarpa Cluster rose Spreading ground smoke Rosa spithamea Coastal ground rose Gayophytum humile Dwarf ground smoke Rubus parviflorus var. velutinus Western thimble berry Spiraea splendens var. splendens Rosy spirea ORCHIDACEAE • ORCHID Platanthera sparsiflora Rein orchid RUBIACEAE • MADDER Galium bolanderi Bolander’s bedstraw POLYGALACEAE • MILKWORT Galium muricatum Humboldt bedstraw Polygala cornuta Sierra milkwort SAXIFRAGACEAE • SAXIFRAGE POLYGONACEAE • KNOTWEED Heuchera micrantha var. densifolia Crevice alum root Eriogonum nudum Naked buckwheat Lithophragma parviflorum Prairie woodland star Eriogonum umbellatum var. goodmanii Sulphur-flowered buckwheat SCROPHULARIACEAE • SNAPDRAGON var. nelsoniorum Nelsons’ buckwheat Antirrhinum vexillocalyculatum var. breweri Polygonum spergulariiforme Spurry knotweed Brewer’s snapdragon Boschniakia strobilacea California ground cone • PHLOX Castilleja pruinosa Frosted Indian paintbrush Collomia grandiflora large-flowered collomia Collinsia grandiflora Large-flowered blue-eyed Mary Collomia tracyi Tracy’s collomia Collinsia parviflora Small-flowered blue-eyed Mary parviflorus Variable- Collinsia rattanii Rattan’s blue-eyed Mary Linanthus pungens Granite prickly-phlox Collinsia sparsiflora var. brucae Spinster’s blue-eyed Mary Microsteris gracilis Slender false phlox Mimulus cardinalis Scarlet monkey flower Navarretia divaricata Mountain pincushion plant Mimulus pulsiferae Candelabrum monkey flower

-3- Penstemon laetus ssp. sagittatusMountain blue penstemon

UMBELLIFERAE () • OR CARROT genuflexa Kneeling angelica Angelica tomentosa California angelica Lomatium tracyi Tracy’s lomatium Lomatium utriculatum Bladder lomatium Osmorhiza occidentalis Western sweet-cicely Sanicula bipinnatifida Purple sanicle Sanicula graveolens Sierra sanicle Sanicula tuberosa Tuberous sanicle Yabea microcarpa False hedge-parsley

VIOLACEAE • VIOLET adunca Western dog violet Viola cuneata Wedge-leaved violet Viola glabella Smooth yellow violet Viola hallii Hall’s violet Viola praemorsa ssp. praemorsa Astoria violet

S O U R C E S

Compiled initially from collections made by D. E. Anderson, B. Klipfel, T. Nelson, V. Rumble, J. O. Sawyer, J. P. Smith, and the field observations made by the California Native Plant Society North Coast Chapter vegetation sampling project.

Nomenclatural updates: 2 June 2017

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