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2018 Vascular Plants of Bear Valley (Colusa County, California) James P. Smith Jr Humboldt State University, [email protected]
Follow this and additional works at: https://digitalcommons.humboldt.edu/botany_jps Part of the Botany Commons
Recommended Citation Smith, James P. Jr, "Vascular Plants of Bear Valley (Colusa County, California)" (2018). Botanical Studies. 40. https://digitalcommons.humboldt.edu/botany_jps/40
This Flora of Northwest California: Checklists of Local Sites of Botanical Interest is brought to you for free and open access by the Open Educational Resources and Data at Digital Commons @ Humboldt State University. It has been accepted for inclusion in Botanical Studies by an authorized administrator of Digital Commons @ Humboldt State University. For more information, please contact [email protected]. A CHECKLIST OF THE VASCULAR PLANTS OF THE WALKER RIDGE - BEAR VALLEY AREA (LAKE AND COLUSA COUNTIES, CALIFORNIA)
Compiled by James P. Smith, Jr. & John O. Sawyer, Jr. Department of Biological Sciences Humboldt State University
Tenth Edition: 01 July 2018
Chlorogalum pomeridianum var. pomeridianum • soaproot F E R N S Dichelostemma multiflorum • wild-hyacinth Dichelostemma volubile • snake-lily, twining brodiaea Dipterostemon capitatum ssp. capitatum • blue dicks Aspidotis densa • Indian's dream Hastingsia alba • white-flowered schoenolirion Equisetum arvense • field horsetail Triteleia hyacinthina • white brodiaea Equisetum laevigatum • smooth scouring-rush Triteleia laxa • Ithuriel's spear Pellaea andromedifolia var. pubescens • coffee fern Triteleia peduncularis • long-rayed triteleia Pellaea mucronata var. mucronata • bird's-foot fern Pentagramma triangularis ssp. triangularis • goldback fern Berberidaceae Woodwardia fimbriata • western chain fern Mahonia dictyota • California barberry
Boraginaceae G Y M N O S P E R M S Amsinckia intermedia • fiddleneck Cryptantha intermedia • Clearwater cryptantha Cupressus macnabiana • Macnab cypress Cynoglossum grande • hound's tongue Cupressus sargentii • Sargent cypress Heliotropium curassavicum var. oculatum • alkali heliotrope Juniperus californica • California juniper Plagiobothrys stipitatus var. micanthus Pinus attenuata • knobcone pine • vernal pool popcorn flower Pinus sabiniana • foothill pine, ghost pine, gray pine Plagiobothrys stipitatus var. stipitatus Torreya californica • California nutmeg • stipitate popcorn flower Calycanthaceae F L O W E R I N G P L A N T S Calycanthus occidentalis • California spice bush
Amaranthaceae Campanulaceae Chenopodium californicum • California goosefoot Downingia insignis • cupped downingia Downingia pulchella ssp. campestris • large-flowered bluecups Amaryllidaceae Githopsis specularioides ssp. specularioides Allium amplectans • narrow-leaved onion • common blue cups Allium bolanderi • Bolander’s onion Nemacladus capillaris • common nemacladus Allium cratericola • dwarf onion Nemacladus montanus • serpentine nemacladus Allium falcifolium • serpentine onion Allium fimbriatum var. fimbriatum • fringed onion Caprifoliaceae Allium fimbriatum var. purdyi • Purdy's fringed onion Lonicera interrupta • chaparral honeysuckle Allium peninsulare • Mexicale onion Allium serra • serrated onion Caryophyllaceae Minuartia californica • California sandwort Anacardiaceae Minuartia douglasii • Douglas' sandwort Rhus aromatica var. trilobata • skunk bush sumac Petrorhagia dubia • grass pink Toxicodendron diversilobum • poison-oak Silene californica • California Indian pink Silene campanulata ssp. glandulosa • catchfly, sticky campion Apocynaceae Silene gallica • windmill pink Asclepias cordifolia • purple milkweed Silene multinerva • many-veined catchfly Asclepias fascicularis • whorled milkweed Velezia rigida • velezia Asclepias solanoana • prostrate milkweed Asclepias speciosa • showy milkweed Cistaceae Crocanthremum scoparium var. vulgare • peak rush-rose Asparagaceae Brodiaea elegans ssp. elegans • harvest brodiaea Compositae (Asteraceae) Brodiaea rosea • Indian Valley brodiaea Achillea millefolium • yarrow
-1- Achyrachaena mollis • blow-wives • western morning glory Agoseris grandiflora • large-flowered agoseris Convolvulus arvensis • field bindweed Agoseris heterophylla • annual agoseris Cuscuta sp. • dodder Ancistrocarphus filagineus • woolly fishhooks Anthemis cotula • mayweed Cornaceae Arnica discoidea • rayless arnica Cornus glabrata • smooth dogwood Artemisia douglasiana • Douglas' mugwort Baccharis pilularis var. consanguinea • coyote brush Crassulaceae Baccharis salicifolia • mule fat Crassula connata • pygmy stonecrop Balsamorhiza macrolepis ssp. macrolepis Dudleya cymosa ssp. cymosa • common dudleya • California balsamroot Sedum spathulifolium • yellow sedum Calycadenia fremontii • Fremont's calycadenia Calycadenia pauciflora • small-flowered rosin weed Cruciferae (Brassicaceae) Centaurea melitensis • tocalote, Napa thistle Arabis breweri • Brewer's rock cress Centaurea solstiatilis • yellow star thistle Athysanus pusillus • common sand weed Chaenactis glabriuscula var. heterocarpha • yellow pin-cushion Brassica rapa • black mustard Cichorium intybus • chicory Capsella bursa-pastoris • shepherd's purse Cirsium cymosum • peregrine thistle Caulanthus lasiophyllus • California mustard Cirsium douglasii var. breweri • swamp thistle Descurainia sophia • flix weed, tansy mustard Cirsium occidentale var. occidentale • cobweb thistle Erysimum capitatum ssp. capitatum • western wallflower Ericameria linearifolia • narrowleaf goldenbush Hirschfeldia incana • hedge mustard Erigeron foliosus var. confinis • leafy daisy Lepidium latifolium • perennial peppergrass Eriophyllum lanatum var. achillaeoides • woolly-sunflower Lepidium nitidum • common peppergrass Filago californica • California filago Sisymbrium altissimum • tumble mustard Filago gallica • narrow-leaved filago Streptanthus breweri • Brewer's jewel flower Gnaphalium palustre • lowland cudweed Streptanthus glandulosus • sticky jewel flower Grindelia camporum var. camporum • Great Valley gumplant Streptanthus hesperidis • serpentine jewel flower Harmonia hallii • Hall's tarweed Streptanthus morrisonii • Three Peaks jewel flower Helenium bigelovii • Bigelow's sneezeweed Thelypodium brachycarpum • short-podded thelypodium Helianthella californica var. californica • California helianthella Thysanocarpus curvipes • sand fringe pod Helianthus bolanderi • serpentine sunflower Thysanocarpus laciniatus var. laciniatus • southern lacepod Hemizonella minima • opposite-leaved tarweed Hemizonia pungens • common spineweed Cucurbitaceae Hesperevax sparsiflora • slender evax Marah fabaceus var. agrestis • wild cucumber, manroot Hypochoeris glabra • smooth cat’s-ear Marah watsonii • Watson's manroot, taw manroot Hypochoeris radicata • hairy cat's-ear Lactuca serriola var. integrata • prickly lettuce Cyperaceae Lagophylla minor • lesser hareleaf Carex luzulina • woodrush sedge Lagophylla ramosissima • common hareleaf Carex nudata • torrent sedge Lasthenia californica • goldfields Carex obnupta • slough sedge Lasthenia glabrata • yellow-rayed goldfields Carex praegracilis • clustered field sedge Layia gallardioides • woodland layia Carex serratodens • two-toothed sedge Layia platyglossa • tidy tips Lessingia nemaclada • slender-stemmed lessingia Datiscaceae Madia gracilis • common tarweed Datisca glomerata • Durango root Malacothrix floccifera • woolly malacothrix Matricaria discoidea • pineapple weed Dipsacaceae Micropus californicus var. californicus • slender cottonweed Dipsacus fullonum • Fuller's teasel Microseris douglasii • Douglas' microseris Microseris laciniata ssp. laciniata • cut-leaved scorzonella Ericaceae Packera clevelandii • Cleveland’s ragwort, serpentine groundsel Arctostaphylos canescens ssp. canescens • hoary manzanita Packera eurycephalus var. eurycephalus Arctostaphylos canescens ssp. sonomensis • cut-leaved butterweed • Sonoma manzanita Packera greenei • flame butterweed Arctostaphylos glandulosa • hoary manzanita Pentachaeta exilis • meager pygmy daisy Arctostaphylos manzanita ssp. manzanita • common manzanita Psilocarphus brevissimus ssp. brevissimus Arctostaphylos viscida ssp. pulchella • white-leaved manzanita • round woolly-heads Arctostaphylos viscida ssp. vsicida • sticky manzanita Psilocarphus tenellus • slender woolly-head Rhododendron occidentale • western azalea Rigiopappus leptocladus • false wire weed Senecio vulgaris • common groundsel Euphorbiaceae Silybum marianum • milk thistle Croton setigerus • turkey mullein, dove weed Solidago velutina ssp. californica • California goldenrod Euphorbia crenulata • Chinese caps Stephanomeria virgata • twiggy wreath plant Euphorbia spathulata • reticulate-seeded spurge Uropappus lindleyi • silver puffs Wyethia angustifolia • foothill mule's-ear Fagaceae Wyethia glabra • smooth mule's-ear Notholithocarpus densiflorus • tanoak Xanthium strumarium • rough cocklebur Quercus berberidifolia • scrub oak Quercus chrysolepis • canyon live oak Convolvulaceae Quercus douglasii • blue oak Calystegia collina ssp. oxyphylla • serpentine morning glory Quercus durata var. durata • leather oak Calystegia occidentalis ssp. occidentalis Quercus lobata • valley oak
-2- Quercus x morehus • oracle oak Phacelia egena • Kaweah River scorpion weed Quercus palmeri • Palmer's oak Phacelia heterophylla ssp. virgata • virgate phacelia Quercus wislizenii var. frutescens • scrub live oak Phacelia imbricata ssp. imbricata • imbricate phacelia Phacelia tanacetifolia • fiddleneck Garryaceae Garrya congdonii • Congdon's or interior silk-tassel Iridaceae Garrya elliptica var. elliptica • wavy-leaved silk-tassel Iris macrosiphon • slender-tubed iris, ground iris Garrya fremontii • Fremont's silk-tassel Sisyrinchium bellum • California blue-eyed-grass
Gentianaceae Juglandaceae Zelterna muehlenbergii • Monterey centaury, canchalagua Juglans hindsii • northern California walnut Zelterna trichantha • alkali centaury Juncaceae Geraniaceae Juncus balticus var. ater • Baltic rush Erodium botrys • broad-leaved filaree Juncus bufonius var. bufonius • toad rush Erodium cicutarium • red-stemmed filaree Juncus bufonius var. congestus • toad rush Juncus oxymeris • pointed rush Gramineae (Poaceae) Juncus patens • spreading rush Agropyron sp. • wheat grass Juncus phaeocephalus var. paniculatus • brown-headed rush Aira caryophyllea • silver hair grass Juncus xiphioides • iris-leaved rush Avena barbata • slender wild oat Avena fatua • wild oat Labiatae (Lamiaceae) Briza minor • little quaking grass Marrubium vulgare • horehound Bromus carinatus • California brome Monardella villosa ssp. franciscana • coyote mint Bromus diandrus • ripgut brome Monardella viridis • green monardella, green mint Bromus hordeaceus ssp. hordeaceus • soft chess Pogogyne douglasii ssp. parviflora • Douglas' pogogyne Bromus madritensis ssp. rubens • foxtail brome, red brome Salvia columbariae • chia Bromus stamineus • South American brome Scutellaria siphocampyloides • Austin's skullcap Bromus tectorum • cheat grass, downy brome Scutellaria tuberosa • Dannie's skullcap Danthonia californica • California oat grass Stachys albens • white hedge-nettle Deschampsia caespitosa ssp. caespitosa • tufted hair grass Trichostema laxum • turpentine weed, vinegar weed Deschampsia danthonioides • annual hair grass Distichlis spicata • salt grass Lauraceae Elymus caput-medusae • medusa head Umbellularia californica var. californica • California bay Elymus elongatus • tall wheat grass Elymus elymoides • squirreltail grass Leguminosae (Fabaceae) Elymus glaucus • blue wild rye Astragalus breweri • Brewer’s milkvetch Elymus triticoides • creeping wild-rye Astragalus clevelandii • Cleveland's milkvetch Elymus trachycaulus • slender wheat grass Astragalus gambelianus • Gambel's milkvetch Festuca bromoides • six-week's fescue Astragalus rattanii var. jepsonianus • Jepson's milkvetch Festuca microstachys • few-flowered annual fescue Cercis occidentalis • western redbud Festuca myuros • rat-tail fescue Glycyrrhiza lepidota • wild licorice Festuca perenne • perennial rye grass Lathyrus jepsonii var. californicus • Jepson's pea Gastridium ventricosum • nit grass Lathyrus vestitus var. vestitus • Pacific pea Hordeum brachyantherum • wild barley Lotus corniculatus • bird's-foot trefoil Hordeum murinum ssp. glaucum • glaucous barley Lotus grandiflorus var. grandiflorus • chaparral lotus Hordeum murinum ssp. leporinum • Mediterranean barley Lotus humistratus • short-podded lotus, colchita Melica californica var. californica • California melic Lotus scoparius • deer weed Melica torreyana • Torrey's onion grass Lotus unifoliatus var. unifoliatus • Spanish clover Phalaris canariensis • canary grass Lupinus albifrons • silver bush-lupine Poa secunda ssp. secunda • pine blue grass Lupinus bicolor • Lindley's annual lupine Polypogon monspeliensis • rabbitfoot grass Lupinus luteolus • butter lupine Scribneria bolanderi • Scribner's grass Lupinus milo-bakeri • Milo Baker’s lupine Stipa cernua • nodding needle grass Lupinus pachylobus • big-podded lupine Stipa pulchra • purple needle grass Lupinus succulentus • fleshy lupine Stipa speciosa Medicago polymorpha • bur-clover Melilotus officinalis • white sweet clover Grossulariaceae Melilotus indica • yellow sweet clover Ribes malvaceum var. malvaceum • chaparral currant Pediomelum californicum • California psoralea Ribes quercetorum • oak gooseberry Pickeringia montana ssp. montana • chaparral pea Ribes sanguineum var. glutinosum • sticky red-flowered c. Robinia pseudoacacia • black locust Trifolium albopurpureum • rancheria clover Hippocastanaceae Trifolium bifidum • pinole clover Aesculus californica • California buckeye Trifolium ciliolatum • foothill clover Trifolium depauperatum var. truncatum • swollen clover Hydrophyllaceae Trifolium dichotomum • branched Indian clover Emmenanthe penduliflora var. penduliflora • whispering bells Trifolium fucatum • sour clover, bull clover Nemophila heterophylla • canyon nemophila Trifolium hirtum • rose clover Nemophila menziesii var. menziesii • baby blue-eyes Trifolium microcephalum • small-headed clover Nemophila parviflora var. parviflora • woodland nemophila Trifolium obtusiflorum • creek clover Phacelia corymbosa • serpentine phacelia Trifolium variegatum • whitetipped clover
-3- Trifolium wildenovii • tomcat clover Epilobium minutum • annual fireweed, minute willow herb Vicia benghalensis • Mediterranean vetch, purple vetch Vicia ludoviciana • Louisiana vetch Orchidaceae Epipactis gigantea • stream orchis Liliaceae Piperia leptopetala • narrow-petalled rein orchid Calochortus amabilis • yellow fairy lanterns Calochortus luteus • yellow mariposa Papaveraceae Calochortus splendens • pink mariposa Argemone munita ssp. rotundata • prickly poppy Calochortus superbus • white gold nuggets Dendromecon rigida • bush poppy Calochortus uniflorus • large-flowered star-tulip Ehrendorferia chrysantha • golden ear-drops Fritillaria affinis var. affinis • checker-lily, mission bells Eschscholzia californica ssp. californica • California poppy Fritillaria pluriflora • adobe-lily Eschscholtzia caespitosa • foothill poppy Fritillaria purdyi • Purdy's fritillary Platystemon californicus • cream cups Fritillaria recurva • scarlet fritillary Lilium pardalinum ssp. pardalinum • leopard lily Plantaginaceae Plantago erecta • California dwarf plantain Linaceae Hesperolinon californicum • California dwarf-flax Polemoniaceae Hesperolinon disjunctum • dwarf-flax Allophyllum gilioides • straggling gilia, dense false gily flower Hesperolinon drymarioides • dwarf-flax, foothill flax Collomia diversifolia • serpentine collomia Collomia heterophylla • varied-leaved collomia Loasaceae Gilia capitata ssp. capitata • globe gilia Mentzelia dispersa • bushy blazing star Gilia tricolor ssp. tricolor • bird's-eye gilia, tricolored gilia Mentzelia laevicaulis • blazing star Leptosiphon androsaceus • showy gilia Mentzelia micrantha • small-flowered stickleaf Leptosiphon bicolor • baby stars Leptosiphon ciliatus • whisker brush Lythraceae Leptosiphon parviflorus • common linanthus Lythrum hyssopifolia • loosestrife, grass poly Linanthus dichotomus ssp. meridianus • evening snow Microsteris gracilis • slender phlox Malvaceae Navarretia heterandra • Tehama navarretia Sidalcea diploscypha • fringed sidalcea Navarretia jepsonii • Jepson's navarretia Sidalcea hartwegii • Hartweg's sidalcea Navarretia leptalea • bride's gilia Sidalcea malvaeflora • Checker mallow Navarretia paradoxinota • Poter’s or paradox navarretia
Melanthiaceae Polygonaceae Zigadenus fremontii • Fremont's death-camas Chorizanthe membranacea • pink spineflower Zigadenus micranthus var. m. • small-flowered death-camas Eriogonum compositum var. c. • large-leaved buckwheat Zigadenus venenosus var. venenosus • meadow death-camas Eriogonum dasyanthemum • hairy buckwheat Eriogonum nervulosum • Snow Mtn. buckwheat Montiaceae Eriogonum nudum var. nudum • naked-stemmed buckwheat Calandrinia ciliata • red maids Eriogonum tripodum • tripod buckwheat Calyptridium monanthukm • little pussy paws Eriogonum vimineum • wicker buckwheat Calyptridium quadripetalum • pussy paws Eriogonum wrightii ssp. trachygonum • Wright's buckwheat Claytonia exigua • common miner's lettuce Rumex crispus • curly dock Claytonia gypsophiloides • serpentine miner's lettuce Rumex salicifolius • willow dock Claytonia parviflora ssp. parviflora • small miner's lettuce Claytonia perfoliata • miner's lettuce, Indian lettuce Primulaceae Claytonia rubra • red miner's lettuce Dodecatheon hendersonii • Henderson's shooting star Lewisia rediviva ssp. rediviva • bitter root Lysimachia arvensis • scarlet pimpernel
Moraceae Ranunculaceae Ficus carica • common or edible fig Aquilegia eximia • serpentine or Van Houtte's columbine Clematis lasiantha • virgin's bower, chaparral clematis Namaceae Clematis ligusticifolia • western virgin's bower Eriodictyon californicum • yerba santa Delphinium hesperium ssp. hesperium • western larkspur Delphinium hesperium ssp. pallescens • pale western larkspur Oleaceae Delphinium nudicaule • red larkspur Forestiera pubescens • desert-olive, stretch berry Delphinium patens ssp. patens • larkspur Fraxinus dipetala • foothill ash Delphinium uliginosum • bog larkspur, swamp larkspur Fraxinus latifolia • Oregon ash Delphinium variegatum var. variegatum • royal larkspur Ranunculus canus var. canus • Sacramento Valley buttercup Onagraceae Ranunculus hebecarpus • delicate buttercup Camissonia contorta • annual evening-primrose Ranunculus occidentalis • western buttercup Camissonia graciliflora • hill sun cup Ranunculus uncinatus • woodland buttercup Clarkia affinis • chaparral clarkia Clarkia concinna ssp. concinna • red ribbons, lovely clarkia Rhamnaceae Clarkia gracilis ssp. gracilis • slender clarkia Ceanothus cuneatus var. cuneatus • buck brush Clarkia gracilis ssp. tracyi • Tracy's farewell-to-spring Ceanothus integerrimus • deer brush Clarkia purpurea ssp. quadrivulnera • four-spotted clarkia Ceanothus jepsonii ssp. albiflorus • Jepson's ceanothus Clarkia rhomboidea • diamond clarkia Ceanothus prostratus • Siskiyou mat Clarkia unguiculata • elegant clarkia Frangula californica ssp. californica • California coffeeberry
-4- Frangula californica ssp. crassifolia • thick-leaved coffee berry Solanum umbelliferum • blue witch Frangula californica ssp. tomentella • hoary coffeeberry Rhamnus ilicifolia • holly-leaved redberry Styracaceae Styrax redivivus • snowdrop bush Rosaceae Adenostoma fasciculatum var. fasciculatum • chamise Tamariaceae Cercocarpus betuloides var. betuloides • mountain-mahogany Tamarix parviflora • small-flowered salt-cedar Heteromeles arbutifolia • toyon, Christmas berry Horkelia californica ssp. elata • tall horkelia Typhaceae Prunus subcordata var. subcordata • Sierra plum Typha angustifolia • narrow-leaved cattail Rosa californica • California wild rose Umbelliferae (Apiaceae) Rubiaceae Angelica tomentosa • Californica angelica Galium andrewsii ssp. andrewsii • pinemat Conium maculatum • poison hemlock Galium aparine • common bedstraw, goose-grass Daucus pusillus • rattlesnake weed Galium bolanderi • Bolander's bedstraw Eryngium aristulatum var. a. • coyote thistle, Jepson's eryngo Galium porrigens var. porrigens • climbing bedstraw Lomatium californicum • California lomatium Lomatium dasycarpum • woolly-fruited lomatium Salicaceae Lomatium hooveri • Hoover's lomatium Populus fremontii ssp. fremontii • Fremont's cottonwood Lomatium macrocarpum • large-fruited lomatium Salix breweri • serpentine willow Lomatium marginatum • Butte parsnip Salix exigua • sandbar willow, narrow-leaved willow Lomatium utriculatum • common lomatium Perideridia bolanderi ssp. bolanderi • Bolander's yampah Saxifragaceae Sanicula bipinnata • poison sanicle Lithophragma heterophyllum • woodland star, hill star Sanicula bipinnatifida • purple sanicle Lithophragma parviflorum var. parviflorum • prairie star Sanicula crassicaulis • Pacific snakeroot Saxifraga californica • California saxifrage Sanicula tuberosa • tuberous sanicle Tauschia kelloggii • Kellogg’s umbrella wort Scrophulariaceae Torilis nodosa • rattlesnake weed Antirrhinum vexillocalyculatum var. breweri • B’s snapdragon Castilleja applegatei • Applegate's paintbrush Valerianaceae Castilleja attenuata • valley tassels Plectritis ciliosa ssp. ciliosa • white-spurred plectritis Castilleja densiflora ssp. densiflora • owl's-clover Plectritis macrocera var. macrocera • white plectritis Castilleja exserta • purple owl's-clover Castilleja foliolosa • woolly Indian paintbrush Verbenaceae Castilleja minor ssp. spiralis • large-flowered Indian paintbrush Phyla nodiflora • mat-grass, fog fruit Castilleja rubicundula ssp. rubicunda • cream sacs Collinsia bartsiifolia var. bartsiifolia • white Chinese houses Viburnaceaei Collinsia greenei • Greene's blue-eyed Mary Viburnum ellipticum • western viburnum Collinsia heterophylla var. heterophylla • Chinese houses Collinsia sparsiflora var. arvensis • spinster’s blue-eyed Mary Violaceae Collinsia sparsiflora var. collina • spinster’s blue-eyed Mary Viola douglasii • Douglas' violet Cordylanthus pilosus ssp. pilosus • hairy bird's beak Cordylanthus pringlei • Pringle's bird's beak Viscaceae Keckiella breviflora ssp. glabrisepala • bush penstemon Phoradendron bolleanum • juniper mistletoe Keckiella corymbosa • red-flowered bush penstemon Phoradendron villosum ssp. villosum • oak mistletoe Keckiella lemmonii • Lemmon's bush penstemon Mimulus aurantiacus var. a. • orange bush monkey-flower Vitaceae Mimulus douglasii • purple mouse-ears Vitis californica • California wild grape Mimulus guttatus • seep-spring monkey-flower Mimulus layneae • serpentine monkey-flower ******************** Mimulus nudatus • bare monkey-flower Mimulus rattanii • Rattan's monkey-flower The general area covered by this checklist includes Walker Orobanche bulbosa • chaparral broomrape Ridge, Indian Valley, and Bear Valley in Lake and Colusa Orobanche fasciculata • clustered broomrape counties. The original Walker Ridge checklist was compiled by Orobanche uniflora • naked broomrape J. P. Smith and J. O. Sawyer for a North Coast Chapter, Pedicularis densiflora ssp. densiflora • Indian warrior California Native Plant Society, field trip. To this we have added Penstemon heterophyllus ssp. purdyi • foothill penstemon collections made by the Advanced Plant Taxonomy students at Scrophularia californica ssp. floribunda • many-flowered figwort HSU and plants from these sources: Triphysaria eriantha ssp. eriantha • butter-and eggs, johnny-tuck Clark, G. M. & D. L. Magney. 1994. Vascular plants of Bear Verbascum blattaria • moth mullein Valley, Walker Ridge, and surrounding areas: Colusa and Lake counties, California. Four Seasons 9(4): 25-32. Simaroubaceae Ailanthus altissima • Tree-of-heaven Clark, G. M. & D. L. Magney. 1997. Vascular plants of Bear Valley, Walker Ridge, and surrounding areas, Colusa and Lake Solanaceae counties, California. Four Seasons 10(3): 24-35. Datura wrightii • sacred datura, thorn-apple Nicotiana glauca • tree tobacco Consortium of California Herbaria. Solanum nigrum • black nightshade ucjeps.berkeley.edu/consortium/ Solanum parishii • Parish's nightshade
-5- Edwards, S. W. 1994. Bear Valley: wildflowers as John Muir described them. Fremontia 22(4): 12-16.
Edwards, S. W. & C. Thayer. 1998. Notes on the Bear Valley plant list. Four Seasons 10(4): 22-24.
Edwards, S. W. & C. Thayer. 2010. Second addendum to the Bear Valley-Walker Ridge plant list. Four Seasons 13(4): 81- 83.
Vascular Plant Herbarium. Humboldt State University. Department of Biological Sciences.
Please send additions and corrections to: James P. Smith, Jr. Department of Biological Sciences Humboldt State University Arcata, California 95521 [email protected]
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