Checklist1 of Vascular Flora Pennington Creek Biological Reserve California Polytechnic State University San Luis Obispo County, California (10 June 2019) David J Keil Robert F Hoover Herbarium Biological Sciences Department California Polytechnic State University San Luis Obispo, California Scientific Name n ❀ Achillea millefolium n Acmispon brachycarpus Family Rare yarrow ASTERACEAE o shortpod deervetch FABACEAE o n Acmispon junceus var biolettii Biolett's rush deerweed FABACEAE v n Acmispon junceus var junceus common rush deerweed FABACEAE v strigose deer-vetch FABACEAE v n ❀ Acmispon strigosus Common Name Please notify the author of additions or corrections to this list (dkeil@calpoly.edu) ❀ — See Wildflowers of San Luis Obispo, California, second edition (2018) for photograph Most are illustrated in the first edition as well; old names for some species in square brackets n — California native i — exotic species, introduced to California, naturalized or waif v — documented by one or more specimens (Consortium of California Herbaria record; specimen in OBI; or collection that has not yet been accessioned) o — observed during field surveys; no voucher specimen known Rare—California Rare Plant Rank n ❀ Adenostoma fasciculatum var fasciculatum n Adiantum jordanii chamise ROSACEAE v California maidenhair fern PTERIDACEAE o n ❀ Agoseris grandiflora var grandiflora large-flowered mountaindandelion red-skinned onion ASTERACEAE o ALLIACEAE v n ❀ Arctostaphylos obispoensis n ❀ Artemisia californica bishop manzanita ERICACEAE California sagebrush ASTERACEAE v n ❀ Artemisia douglasiana mugwort ASTERACEAE o n ❀ Astragalus curtipes i Avena barbata Morro milk-vetch FABACEAE v slender wild oats POACEAE v common wild oats POACEAE v coyote bush ASTERACEAE v California goosefoot CHENOPODIACEAE v common goldenstar THEMIDACEAE o false brome POACEAE o black mustard BRASSICACEAE o mountain brome POACEAE o n ❀ Allium haematochiton i Avena fatua n ❀ Baccharis pilularis n ❀ Blitum californicum [Chenopodium californicum] n Bloomeria crocea var crocea i Brachypodium hybridum i ❀ Brassica nigra n Bromus carinatus var marginatus 4.3 v i Bromus diandrus ripgut brome POACEAE v i Bromus hordeaceus soft chess brome POACEAE v i Bromus rubens red brome POACEAE o n ❀ Calandrinia menziesii [Calandrinia ciliata] red maids MONTIACEAE o n ❀ Calochortus clavatus var clavatus club-haired mariposa lily LILIACEAE 4.3 v n ❀ Calochortus obispoensis San Luis Obispo star-tulip LILIACEAE 1B.2 v n ❀ Calystegia macrostegia subsp cyclostegia coast morning glory CONVOLVULACEAE v n ❀ Calystegia subacaulis subsp episcopalis n ❀ Cardamine californica San Luis Obispo morning glory, Cambria morning glory milk maids, rain bells, California toothwort Italian thistle CONVOLVULACEAE 4.2 v BRASSICACEAE o ASTERACEAE o saw-toothed sedge CYPERACEAE v sawgrass sedge, San Diego sedge coast Indian paintbrush CYPERACEAE v OROBANCHACEAE v n ❀ Castilleja minor subsp spiralis n Ceanothus cuneatus var fascicularis annual Indian paintbrush OROBANCHACEAE v dune buckbrush RHAMNACEAE n ❀ Ceanothus spinosus i ❀ Centaurea melitensis greenbark ceanothus RHAMNACEAE v tocalote, Maltese star thistle ASTERACEAE o n ❀ Chlorogalum pomeridianum var pomeridianum n ❀ Chorizanthe breweri common soap plant AGAVACEAE v Brewer's spineflower POLYGONACEAE 1B.3 v n ❀ Cirsium fontinale var obispoense Chorro Creek bog thistle ASTERACEAE 1B.2 v n ❀ Clarkia bottae punchbowl clarkia ONAGRACEAE v n ❀ Claytonia perfoliata subsp perfoliata common miner's lettuce MONTIACEAE v poison hemlock APIACEAE v n ❀ Cornus sericea subsp occidentalis creek dogwood CORNACEAE v n ❀ Crassula connata common pygmyweed CRASSULACEAE v n ❀ Croton setiger turkey-mullein EUPHORBIACEAE v n ❀ Cryptantha clevelandii var florosa n Delphinium parryi subsp blochmaniae coastal cryptantha BORAGINACEAE v Blochman's larkspur, dune larkspur bush poppy, tree poppy RANUNCULACEAE i ❀ Carduus pycnocephalus n Carex serratodens n Carex spissa n ❀ Castilleja affinis subsp affinis i ❀ Conium maculatum n ❀ Dendromecon rigida PAPAVERACEAE 4.2 1B.2 o v v n ❀ Diplacus aurantiacus var aurantiacus [Mimulus aurantiacus] n ❀ Dipterostemon capitatus subsp capitatus [Dichelostemma capitatum subsp capitatum] n ❀ Dudleya abramsii subsp murina common bush monkeyflower PHRYMACEAE v blue-dicks, schoolbells THEMIDACEAE v mouse-gray dudleya CRASSULACEAE n ❀ Dudleya lanceolata n Elymus condensatus lance-leaf dudleya CRASSULACEAE o giant wildrye POACEAE o blue wildrye POACEAE v n ❀ Epilobium canum subsp canum California-fuchsia ONAGRACEAE o n ❀ Epilobium ciliatum subsp ciliatum n Erigeron foliosus var foliosus common willow-herb ONAGRACEAE o common leafy fleabane daisy ASTERACEAE o n ❀ Eriogonum elongatum var elongatum long-stem buckwheat POLYGONACEAE o n ❀ Eriogonum parvifolium coastal buckwheat POLYGONACEAE v n ❀ Eriophyllum confertiflorum var confertiflorum common golden-yarrow ASTERACEAE o i ❀ Erodium botrys storkbill filaree GERANIACEAE o i ❀ Erodium cicutarium i Erodium moschatum redstem filaree GERANIACEAE v greenstem filaree GERANIACEAE o large monkeyflower PHRYMACEAE v n ❀ Erythranthe guttata [Mimulus guttatus] n Erythranthe microphylla common monkeyflower PHRYMACEAE v small-leaved monkeyflower PHRYMACEAE v n ❀ Eschscholzia californica n ❀ Eucrypta chrysanthemifolia var chrysanthemifolia n ❀ Euphorbia spathulata i Festuca bromoides California poppy PAPAVERACEAE v sweet eucrypta HYDROPHYLLACEAE o warty spurge EUPHORBIACEAE v brome fescue POACEAE v n n Elymus glaucus subsp glaucus Erythranthe grandis 1B.3 v three-weeks fescue, small fescue ryegrass POACEAE o POACEAE v n ❀ Frangula californica subsp californica California coffeeberry RHAMNACEAE v n ❀ Fremontodendron californicum Fremontia, flannelbush MALVACEAE v n ❀ Fritillaria biflora var biflora n Galium angustifolium subsp angustifolium chocolate lily LILIACEAE v narrow-leaved bedstraw RUBIACEAE v n ❀ Galium aparine RUBIACEAE v RUBIACEAE o n i Festuca microstachys Festuca perennis n Galium californicum subsp flaccidum cleavers, common bedstraw, goosegrass California bedstraw n Galium porrigens var porrigens climbing bedstraw RUBIACEAE o cut-leaved geranium GERANIACEAE v California gilia POLEMONIACEAE o large-headed sawtooth goldenbush Bigelow's sneezeweed ASTERACEAE v ASTERACEAE v hayfield tarweed ASTERACEAE o erect evax ASTERACEAE o i ❀ Geranium dissectum n ❀ Gilia achilleifolia subsp achilleifolia n ❀ Hazardia squarrosa var squarrosa n ❀ Helenium bigelovii n ❀ Hemizonia congesta subsp luzulifolia n Hesperevax sparsiflora var sparsiflora n Hesperocyparis sargentii Sargent cypress CUPRESSACEAE v n Hesperolinon micranthum threadstem dwarf flax LINACEAE v n ❀ Hesperoyucca whipplei chaparral yucca AGAVACEAE v n ❀ Heteromeles arbutifolia toyon, Christmas berry, california-holly ocean spray, creambush ROSACEAE v ROSACEAE v Mediterranean barley POACEAE o mouse foxtail barley POACEAE v n ❀ Holodiscus discolor i Hordeum marinum subsp gussoneanum i Hordeum murinum subsp leporinum i ❀ Hypochaeris glabra n Juncus balticus subsp ater smooth cat's-ear ASTERACEAE o baltic rush JUNCACEAE o n Juncus xiphioides iris-leaved rush JUNCACEAE o n Koeleria macrantha Junegrass POACEAE o Lactuca saligna slender lettuce ASTERACEAE v i ❀ Lactuca serriola n Lasthenia californica subsp macrantha prickly lettuce ASTERACEAE o perennial goldfields ASTERACEAE n ❀ Lathyrus vestitus var vestitus Pacific sweet-pea FABACEAE o n ❀ Lepidium nitidum shining peppercress BRASSICACEAE o n ❀ Lithophragma heterophyllum n Logfia filaginoides hillside woodland star SAXIFRAGACEAE v California cotton-rose ASTERACEAE v woolly-fruited biscuitroot APIACEAE v n ❀ Lomatium parvifolium small-leaved biscuitroot APIACEAE n ❀ Lomatium utriculatum spring gold biscuitroot APIACEAE v n ❀ Lonicera hispidula n Lupinus albifrons var collinus California honeysuckle CAPRIFOLIACEAE v hillside silver bush lupine FABACEAE v n ❀ Lupinus succulentus arroyo lupine FABACEAE o scarlet pimpernel MYRSINACEAE v manroot, wild cucumber vine CUCURBITACEAE o California bur-clover FABACEAE v i n Lomatium dasycarpum subsp dasycarpum i ❀ Lysimachia arvensis [Anagallis arvensis] n ❀ Marah fabacea i Medicago polymorpha 1B.2 4.2 o v n Melica californica California melic POACEAE o n Melica imperfecta little melic POACEAE v white sweet-clover FABACEAE v short scaled microseris ASTERACEAE o olive OLEACEAE v i ❀ Melilotus albus n Microseris douglasii subsp tenella i Olea europaea i ❀ Opuntia ficus-indica Indian-fig prickly-pear, mission prickly-pear California peony CACTACEAE o PAEONIACEAE v coffee fern PTERIDACEAE o goldback fern PTERIDACEAE o n ❀ Phacelia imbricata subsp imbricata wide-sepaled rock phacelia HYDROPHYLLACEAE o n ❀ Phacelia viscida var viscida n Pinus sabiniana sticky phacelia HYDROPHYLLACEAE v foothill pine, gray pine PINACEAE v n ❀ Plantago erecta foothill plantain PLANTAGINACEAE v i ❀ Plantago lanceolata n Platanus racemosa English plantain PLANTAGINACEAE o California sycamore PLATANACEAE v n ❀ Platystemon californicus n Poa secunda subsp secunda cream cups PAPAVERACEAE o one-sided bluegrass POACEAE v n ❀ Paeonia californica n Pellaea andromedifolia n Pentagramma triangularis subsp triangularis n Polypodium californicum California polypody POLYPODIACEAE o i Polypogon monspeliensis rabbitfoot grass POACEAE o n ❀ Primula clevelandi [Dodecatheon clevelandii] Cleveland's shooting star PRIMULACEAE v n ❀ Pseudognaphalium californicum n Pterostegia drymarioides California everlasting ASTERACEAE v notchleaf POLYGONACEAE v n Quercus agrifolia var agrifolia coast live oak FAGACEAE v n Quercus durata var durata leather oak FAGACEAE v n ❀ Rafinesquia californica California-chicory ASTERACEAE o n ❀ Ranunculus californicus n Rhamnus crocea California buttercup RANUNCULACEAE v spiny redberry RHAMNACEAE v n ❀ Ribes speciosum fuchsia-flowered gooseberry GROSSULARIACEAE o n ❀ Rosa spithamea coast ground rose ROSACEAE o n ❀ Rubus ursinus i Rumex pulcher California blackberry ROSACEAE v fiddle dock POLYGONACEAE o n Sabulina douglasii [Minuartia douglasii] Douglas's sandwort CARYOPHYLLACEAE v n Salix breweri SALICACEAE v n Salix lasiolepis SALICACEAE v n ❀ Salvia columbariae serpentine willow, Brewer's willow arroyo willow, California pussywillow chia LAMIACEAE v n ❀ Salvia mellifera black sage LAMIACEAE v n ❀ Salvia spathacea hummingbird sage LAMIACEAE v n ❀ Sambucus nigra subsp caerulea blue elderberry ADOXACEAE v n ❀ Sanicula arguta n Sanicula bipinnatifida sharp-toothed sanicle APIACEAE v purple sanicle APIACEAE v Sanicula hoffmannii Hoffmann's sanicle APIACEAE Senecio vulgaris common groundsel ASTERACEAE o geranium-leaved checkerbloom sleepy catchfly MALVACEAE v CARYOPHYLLACEAE v i ❀ Silene gallica windmill pink CARYOPHYLLACEAE v i ❀ Silybum marianum milk thistle ASTERACEAE o n ❀ Sisyrinchium bellum blue-eyed-grass IRIDACEAE v n ❀ Solanum douglasii Douglas' nightshade SOLANACEAE v n ❀ Solanum umbelliferum var xanti chaparral purple nightshade SOLANACEAE o n ❀ Solidago velutina subsp californica i Sonchus asper subsp asper California goldenrod ASTERACEAE o prickly sow-thistle ASTERACEAE o common sow-thistle ASTERACEAE o n i n ❀ Sidalcea malviflora subsp laciniata n Silene antirrhina i ❀ Sonchus oleraceus 4.3 v n ❀ Stachys bullata n Stachys pycnantha coast hedge-nettle LAMIACEAE o short-spiked hedge-nettle LAMIACEAE v n ❀ Stebbinsoseris heterocarpa i Stellaria media brownpuffs ASTERACEAE o common chickweed CARYOPHYLLACEAE o lesser chickweed CARYOPHYLLACEAE o silver rock-lettuce ASTERACEAE o Hoover's wire-lettuce ASTERACEAE o i Stellaria pallida n ❀ Stephanomeria cichoriacea n Stephanomeria exigua subsp carotifera n Stipa lepida foothill needlegrass POACEAE v n Stipa pulchra purple needlegrass POACEAE o n Streptanthus lasiophyllus California mustard BRASSICACEAE o n ❀ Symphoricarpos mollis n ❀ Symphyotrichum chilense creeping snowberry CAPRIFOLIACEAE v Pacific-aster ASTERACEAE o n ❀ Thermopsis californica var californica California false-lupine FABACEAE v n ❀ Thysanocarpus laciniatus i Torilis nodosa narrow-leaved fringepod BRASSICACEAE o knotted hedge-parsley APIACEAE o n ❀ Toxicodendron diversilobum poison-oak ANACARDIACEAE v n ❀ Toxicoscordion fremontii Fremont's death-camas, starzigadene pinole clover MELANTHIACEAE v FABACEAE o bull clover FABACEAE v pinpoint clover FABACEAE o n Trifolium bifidum var decipiens n ❀ Trifolium fucatum n Trifolium gracilentum n Triphysaria pusilla miniature owl's-clover OROBANCHACEAE v n Umbellularia californica California laurel, California bay silverpuffs LAURACEAE v ASTERACEAE o common vetch FABACEAE v n ❀ Uropappus lindleyi i ❀ Vicia sativa subsp sativa n ❀ Viola pedunculata Johnny jump-up, wild pansy VIOLACEAE v