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Home , Allium bolanderi, Allium falcifolium, Allium fimbriatum, Allium peninsulare, Aquilegia eximia, Arctostaphylos canescens

Humboldt State University Digital Commons @ Humboldt State University

Botanical Studies Open Educational Resources and Data

2018

Checklist of the Vascular of the Walker Ridge and Bear Valley Area, Lake and Colusa Counties

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., "Checklist of the Vascular Plants of the Walker Ridge and Bear Valley Area, Lake and Colusa Counties" (2018). Botanical Studies. 76. https://digitalcommons.humboldt.edu/botany_jps/76

This Flora of Northwest -Checklists of Local Sites 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 multiflorum • wild- • snake-lily, twining capitatum ssp. capitatum • blue dicks Aspidotis densa • Indian's dream alba • white-flowered schoenolirion Equisetum arvense • field horsetail hyacinthina • white brodiaea Equisetum laevigatum • smooth scouring-rush • Ithuriel's spear Pellaea andromedifolia var. pubescens • coffee fern • 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 intermedia • Clearwater cryptantha macnabiana • Macnab cypress Cynoglossum grande • hound's tongue Cupressus sargentii • Sargent cypress Heliotropium curassavicum var. oculatum • alkali heliotrope Juniperus californica • California 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 F L O W E R I N G P L A N T S occidentalis • California spice bush

Amaranthaceae Campanulaceae Chenopodium californicum • California goosefoot Downingia insignis • cupped downingia Downingia pulchella ssp. campestris • large-flowered bluecups Githopsis specularioides ssp. specularioides amplectans • narrow-leaved • common blue cups Allium bolanderi • Bolander’s onion Nemacladus capillaris • common nemacladus Allium cratericola • dwarf onion Nemacladus montanus • serpentine nemacladus Allium falcifolium • serpentine onion var. fimbriatum • fringed onion Caprifoliaceae Allium fimbriatum var. purdyi • Purdy's fringed onion Lonicera interrupta • 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 Silene gallica • windmill pink 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 ssp. elegans • harvest brodiaea Compositae () 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 sp. • dodder Ancistrocarphus filagineus • woolly fishhooks Anthemis cotula • mayweed Arnica discoidea • rayless arnica glabrata • smooth dogwood Artemisia douglasiana • Douglas' mugwort Baccharis pilularis var. consanguinea • coyote brush Crassulaceae Baccharis salicifolia • mule fat Crassula connata • pygmy stonecrop macrolepis ssp. macrolepis Dudleya cymosa ssp. cymosa • common dudleya • California balsamroot Sedum spathulifolium • yellow sedum 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 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 Lagophylla minor • lesser hareleaf 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 Packera clevelandii • Cleveland’s ragwort, serpentine groundsel canescens ssp. canescens • hoary manzanita Packera eurycephalus var. eurycephalus ssp. sonomensis • cut-leaved butterweed • Sonoma manzanita Packera greenei • flame butterweed Arctostaphylos glandulosa • hoary manzanita Pentachaeta exilis • meager pygmy daisy ssp. manzanita • common manzanita Psilocarphus brevissimus ssp. brevissimus 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 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 Quercus douglasii • blue oak 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 () 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 () Elymus glaucus • blue wild rye 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 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 herb Vicia benghalensis • Mediterranean vetch, purple vetch Vicia ludoviciana • Louisiana vetch Orchidaceae Epipactis gigantea • stream orchis Piperia leptopetala • narrow-petalled rein orchid amabilis • yellow fairy lanterns • yellow mariposa Calochortus splendens • pink mariposa 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 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 Zigadenus fremontii • Fremont's death-camas 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 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 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 • 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 Ficus carica • common or edible fig eximia • serpentine or Van Houtte's columbine lasiantha • virgin's bower, chaparral clematis Namaceae • 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 • ash var. variegatum • royal larkspur Ranunculus canus var. canus • Sacramento Valley buttercup Ranunculus hebecarpus • delicate buttercup contorta • annual evening-primrose Ranunculus occidentalis • western buttercup Camissonia graciliflora • hill sun cup Ranunculus uncinatus • woodland buttercup affinis • chaparral clarkia Clarkia concinna ssp. concinna • red ribbons, lovely clarkia Clarkia gracilis ssp. gracilis • slender clarkia 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 • 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 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 Castilleja rubicundula ssp. rubicunda • cream sacs 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 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 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 • -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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