THE SAN DIMAS
EXPERIMENTAL FOREST:
50 YEARS OF RESEARCH

Pacific Southwest Forest and Range Experiment Station
P.O. Box 245, Berkeley, California 94701 May 1988

Nomenclature revision - June 1999 - Dick Swinney


APPENDIX A-FLORA

Flora of the San Dimas Experimental Forest are listed below
alphabetically by family. The gymnosperms and angiosperms
are not listed seperately as they are in Jepson’s manual
(see below). This list was assembled from the 1930’s through
the 1950’s and updated in August 1984.

The nomenclature was revised in July of 1999 by Dick Swinney
according to The Jepson Manual - Higher Pants Of California,
copyright 1993. Some of the original taxa have been eliminated
from this list as they are not recognized by The Jepson Manual,
1993. The previous publication format has been retained. All of
the species data reference remains the same. No additional
plant species or species information has been added to the
updated version of August 1988.

For additional plants adjacent to the south-west portion of the
San Dimas Experimental Forest, see Glendora Foothills Plant
Checklist San Gabriel Mountains, Dick Swinney, copyright1994.

ACERACEAE
Acer macrophyllum Pursh Common, stream
woodlands
AMARANTHACEAE
Amaranthus albus L. Disturbed Areas
Amaranthus retroflexus L. Rare in SDEF

ANACARDIACEAE
Malosma laurina (Nutt.) Abrams Common open
chamise, < 3500 ft
Rhus integrifolia (Nutt. Rare in forest,
Brewer & S. Watsen < 2000 ft
Rhus ovata S. Watson Abundant in oak and
chamise chaparral
Rhus trilobata Torrey & A. Gray Common, cyn.
var. pilosissima Engler in DC. bottoms, throughout
Toxicodendron diversilobum Frequent,stream
(Torrey & A. Gray) E. Greene woodlands

APIACEAE
Angelica tomentosa S. Watson Oak, > 4000 ft, fire
stimulated
Apiastrum angustifolium Nutt. Occasional, grassy
areas, < 2000 ft
Apium graveolens L. Occasional, moist areas
Conium maculatum L. Weed
Daucus pusillus Michs. Common on dry slopes
Foeniculum vulgare Miller Weed below Big Dalton
Dam
Lomatium dasycarpum Openings in chamise,
(Torrey & A. Gray) > 2000 ft
Lomatium lucidum (Torrey Oak chaparral
& A. Gray) Jepson
Lomatium utriculatum Disturbed area,
(Torrey & A. Gray) Coulter Dalton firebreaks
& Rose
Osmorhiza brachypoda Torrey Common throughout
Sanicula arguta J. Coulter & Rose Dry grassy slopes,
< 2000 ft
Sanicula bipinnatifida Hook Openings, occasional
Sanicula crassicaulis DC. Shady, wooded
places
Sanicula tuberosa Torrey Openings in
woodlands
Tauschia arguta (Torrey & Dry slopes and
A. Gray)J.F. Maebr. washes, throughout
Tauschia parishii (Coulter & Rose) Dry Lake
Yabea microcarpa (Hook. &Arn.) Rare
Koso-Polj.

APOCYNACEAE
Apocynum cannabinum L. Patches in stream
var. glaberrinum A. DC. woodland

ARALLIACEAE
Aralia californica S. Watson Common, stream
woodland
ASCLEPIADACEAE
Asclepias eriocarpa Benth. Dry portion of
reservoir
Ascleplias fascicularis Decne. Occasional in
woodlands
Asclepias vestita Hook. & Arn. Dry, rocky places, rare
ASTERACEAE
Achillea millefolium L. Oak and stream
var. lanulosa (Nutt.) Piper woodlands
Acourtia microcephala DC. Occasional in chamise
oak, < 3000 ft
Agoseris grandiflora (Nutt.) Rare, Brown’s Flat
E. Greene
Agoseris heterophylla (Nutt.) Rare,open grassy areas
E. Greene
Agoseris retrorsa (Benth.) Occasional throughout
E. Greene
Ambrosia acanthicarpa Hook. Common weed
Ambrosia psilostachya DC. Occasional colonies
Artemisia californica Less. Abundant in sagebrush,
< 2000 ft
Artemisia douglasiana Besser Abundant along
streams
Aster lanceolatus Wild. ssp. Common in
hesperius (A. Gray) Semple & stream woodland
J. Chmielewski
Baccharis salicifolia (Ruiz Lopez & Common along streams
Pavon) Pers.
Bidens pilosa L. Weed, Tanbark Flats
Brickellia californica (Torrey & Common, open places
A. Gray) A. Gray
Brickellia nevinii A. Gray Occasional, dry, rocky
slopes
Carduus tenuiflorus Curtis Weed, disturbed open
areas
Centaurea cyanus L. Weed, disturbed open
areas
Centaurea melitensis L. Common, grassy places
Chaenactis artemisiaefolia (A. Gray) Occasional, grassy
A. Gray openings
Chaenactis glabriscula DC. var. Occasional,dry
lanosa (DC.) H.M. Hall places
Chamomilla suaveolens (Pursh) Common weed
Rydb.
Chrysothanmus nauseosus (Pallas) Disturbed areas
Britton ssp. consimilis( E. Greene)
H.M. Hall & Clements
Chrysothamnus nauseosus (Pallas) Disturbed areas
Britton ssp. hololeucus (A. Gray)
H.M. Hall & Clements
Cirsium occidentale (Nutt.) Jepson Common roadside
Cirsium occidentale (Nutt.) Jepson Common in chaparral
var. californicum (A. Gray) Keil &
C. Turner
Conyza bonariensis (L.) Cronq. Weed-Tanbark Flats
Conyza canadensis (L.) Cronq. Common weed, grassy
places
Cotula australis (Sieber) Hook. Weed in disturbed
places
Ericameria cuneata (A. Gray) Rock outcrops and cliffs
McClatche var. spathulatus
(A. Gray) H.M. Hall
Ericameria parishii (E. Greene) Abundant throughout,
H.M. Hall var. parishii increases after burn
Ericameria pinifolia (A. Gray) Openings and disturbed
H.M. Hall areas, throughout
Ericameria suffruticosa (Nutt.) Collected-Dalton Rd.
G. Nesom
Erigeron foliosus Nutt. var. foliosus In chamise, oak,
chaparral, burns
Eriophyllum confertiflorum (DC.) Ridges and dry rocky
A. Gray var. confertiflorum slopes, abundant
Filago californica Nutt. Occasionally
Abundant, < 2000 ft
Galinsoga parviflora Cav. var. Rare weed
parviflora
Gnaphalium bicolor Bioleti Occasional in openings
Gnaphalium californicum DC. Common in chamise, oak
Gnaphalium canescens DC. ssp. Common in openings in
beneolens (Davidson) Stebb. & Keil chamise chaparral
Gnaphalium canescens DC. ssp. Occasional in chamise,
microcephalum (Nutt.) Stebb. & Keil Oak
Gnaphalium purpereum L. Occasional at low
elevations
Gnaphalium stramineum Kunth Occasional moist
openings
Grindelia camporum E. Greene Occasional grassy
places, < 2000 ft
Gutierrezia sarothrae (Pursh) Rare, San Dimas Wash
Britton & Rusby
Hazardia squarrosa (Hook. & Common, dry or
Arn.) E. Greene disturbed areas
Helenium puberulum DC. Rare in stream
woodland
Helianthus annuus L. ssp. Occasional colonies
lenticularis (Douglas) Cockerell
Helianthus gracilentus A. Gray Common to abundant
Hemizonia fasciculata (DC.) Torrey Not common, dry areas,
& A. Gray < 2000 ft
Hetrotheca grandiflora Nutt. Open areas, throughout
Heterotheca sesiliflora (Nutt.) Occasional throughout
Hieracium argutum Nutt. Common in
openings
Hulsea heterochroma A. Gray Rare, oak chaparral,
woodland
Hypochoeris glabra L. Weed
Isocoma menziesii (Hook. & Arn.) Disturbed places, low
G. Nesom ssp. vernenioides elevations
(Nutt.) G. Nesom
Lactuca serriola L. Weed, common, open
places
Lagophylla ramosissima Nutt. Open places
Lasthenia californica Lindley Open grassy areas,
< 3000 ft
Layia glandulosa (Hook.) Hook & Openings in Fern
Arn. Cyn.
Lepidospartum squamatum Dry washes, low
(A. Gray) A. Gray elevations
Lessingia filaginifolia (Hook. & Dry Lake, openings
Arn.) M.A. Lane in chamise chaparral
Madia exigua Smith) A. Gray Outside forest, 4500 ft
Madia gracilis (Smith) Keck Openings, firebreaks
Malacothrix clevelandii A. Gray Openings throughout
Malocothrix glabrata A. Gray In burn near Tanbark
Malacothrix saxatilis (Nutt.) Common below 3000 ft
Torrey & A. Gray var.
tenuifolia (Nutt.) A. Gray
Pentachaeta aurea Nutt. Dry, grassy places,
< 2000 ft
Rafinesquia californica Nutt. Occasional, oak,
chamise
Senecio astephanus E. Greene Collected on N.
firebreak
Seneciio flaccidus Less. var. Abundant throughout,
douglasii (DC.) B. Turner & T. washes, dry places
Barkley
Senecio vulgaris L. Common weed
Solidago californica Nutt. Common throughout
forest
Sonchus asper (L.) Hill ssp. asper Weed, disturbed places
Sonchus oleraceus L. Disturbed places
Stephanomeria cichoriacea Common throughout
A. Gray
Stephanomeria virgata Benth. Disturbed places,grassy
openings throughout
Stylocline gnaphalioides Nutt. San Dimas Wash
Tanacetum parthenium (L.) Roadsides
Schultz-B.P.
Taraxacum officinale Wigg. Occasional weed
Tetradymia comosa A. Gray Rare
Uropappus lindleyi (DC.) Nutt. Grassy openings
Venegasia carpesioides DC. Occasional, stream
woodland
Xanthium strumarium L. var. Weed
canadense (Mill.) T. & G.

AZOLLACEAE
Azolla filiculoides Lam. Foating weed in
San Dimas Resevoir
BERBERIDACEAE
Berberis aquifolium Pursh var. Locally common,
dictyota (Jepson) Jepson N. Fork

BETULACEAE
Alnus rhombifolia Nutt. Along stream woodland

BLECHNACEAE
Woodwardia fimbriata Smith In wet areas throughout

BORAGINACEAE
Amsinckia menziesii(Lehm.) Occasional, disturbed
A. Nelson & J.F. Macbr. var. areas, firebreaks
intermedia(Fischer & C. Meyer)
Ganders
Cryptantha flaccida(Lehm.) Rare, disturbed areas
E. Greene in chamise
Cryptantha intermedia(A. Gray) Abundant, disturbed
E. Greene or burned areas,
chamise chaparral
Cryptantha maritima (E. Greene) Fern Cyn. only
E. Greene
Cryptantha micromeres(A. Gray) Disturbed areas
E. Greene
Cryptantha microstachys(A. Gray) Disturbed areas,
E. Greene Tanbark
Cryptantha muricata(Hook. & Arn.) In washes or rocky
Nelson & J.F. Macbr. open slopes
Pectocarya penicillata (Hook. & Arn.) Occasioinal,sandy
DC. washes, < 1500 ft
Plagiobothrys nothofulvus (A. Gray) Rare, open grassy
A. Gray areas, < 2000 ft

BRASSICACEAE
Arabis glabra (L.) Benth. Common, stream
woodland
Arabis sparsiflora Torrey & A. Gray Common in openings
var. arcuata (Nutt.) Rollins throughout, chaparral
Athysanus pusillus (Hook.) Occasional, grassy
E. Greene openings
Brassica nigra (L.) Koch Occasional weed
Brassica rapa L. Occasional weed
Capsella bursa-pastoris (L.) Disturbed areas
Medikkus
Cardamine californica (Torrey & Rare, stream woodland
A. Gray) E. Greene
Cardamine oligosperma Torrey & Common in stream/oak
A. Gray woodland
Erysimum capitatum (Douglas) Dry, rocky
E. Greene slopes, chamise
Guillenia lasiophylla (Hook. & Occasional
Arn.) E. Greene
Hirschfeldia incana (L.) Occasional weed
Lagr.-Fossat
Lepidium virginicum L. var. Disturbed areas
pubescens (E. Greene) Thell.
Rorippa nasturtium-aquaticum Rare, streams
(L.) Hayek
Sisymbrium altissimum L. Weed, open grassy
places
Sisymbrium irio L. Common weed
Sisymbrium officinale L. Weed, grassy places
Thysanocarpus laciniatus Grassy openings in
Torrey & A. Gray oak, chamise

CACTACEAE
Opuntia X occidentalis Engelm. In meadow below
San Dimas Dam

CAMPANULACEAE
Githopsis specularioides Nutt. Burns, open or disturbed
places, oak and
chamise chaparral
Heterocodon rariflorum Nutt. Rare, grassy areas,
incl. Brown’s Flat
Lobelia dunnii E. Greene var. Common along streams
serrata (A. Gray) McVaugh
Triodanis biflora (Ruiz Lopez Open areas near stream
& Pavon) E. Greene

CAPRIFOLIACEAE
Lonicera subspicata Hook. & Abundant, oak, chamise
Arn. chaparral
Sambucus mexicana C. Presl. Occasional in chaparral
Symphoricarpos mollis Nutt. Throughout, shady
slopes in chaparral

CARYOPHYLLACEAE
Cerastium glomeratum Thuill. Disturbed areas,
< 3000 ft
Minuartia douglasii (Torrey & Occasional throughout
A. Gray) Matlf.
Polycarpon tetraphullum (L.) L. Only at flume west Fork
Silene antirrhina L. Only in Sycamore Flat
Silene gallica L. Weed along roads,trails
Silene laciniata Cav. ssp. Openings or shady
major C. Hitchc. & Maguire places, oak, chamise
chaparral
Silene lemmonii S. Watson Woodland, higher
elevation
Silene multinervia S. Watson Burns, disturbed places
Spergula arvensis L. Openings, lower
ssp. arvensis elevations
Spergularia villosa (Pers.) Weed
Cambess
Stellaria media (L.) Villars Common weed,moist
places
Stellaria nitens Nutt. Occasional along trails

CHENOPODIACEAE
Chenopodium albun L. Occasioinal weed
Chenopodium ambrosioides L. Occasional weed
Chenopodium californicum Occasional,stream
(S. Watson) S. Watson woodland
Chenopodium pumilio R.Br. Occasional weed
Salsola tragus L. (S. pestifer Throughout, weed,
Nelson may be the valid name) disturbed grassy
areas

CISTACEAE
Helianthemum scoparium Nutt. Occasional in
openings , < 4000 ft

CONVOLVULACEAE
Calystegia occidentalis Openings, chaparral,
(A. Gray) Brummitt woodland, native
to more N. sites
CRASSULACEAE
Crassula connata (Ruiz Lopez Common, grassy
& Pavon) A. Berger places, < 2000 ft
Dudleya lanceolata (Nutt.) Openings, coastal
Britton & Rose sagebrush
Dudleya multicaulis (Rose) Rare
Moran
Sedum spathulifolium Hook. Only in Fern Cyn.,
3000-4000 ft
CUSCUTACEAE
Cuscuta californica Hook. & Parasite throughout
Arn. forest
Cuscuta subinclusa Durand & Tanbark Flats, parasitic
Hilg.
Cuscuta indecora Choisy var. Introduced weed
indecora

CUCURBITACEAE
Marah macrocarpus (E. Greene) Chamise and oak
E. Greene chaparral, < 4000 ft

CUPRESSACEAE
Calocedrus decurrens (Torrey) Scattered, isolated,
Florin < 4000 ft

CYPERACEAE
Carex alma L. Bailey Common in stream
woodland
Carex globosa Boott Openings in oak
woodland
Carex lanuginosa Michaux Stream woodland
Carex multicaulis L. Bailey Common in woodland
Carex nebrascensis Dewey Stream woodland
Carex spissa L. Bailey Stream woodland
Carex triquetra Boott

DATISCACEAE
Datisca glomerata (C. Presl) Baillon Common throughout

DENNSTAEDTIACEAE
Pteridium aquilinum (L.) Kuhn Often abundant in
var. pubescens L. Underw. stream and oak
woodland

DRYOPTERIDACEAE
Cystopteris fragilis(L.) Bernh. Common, stream
woodland
Dryopteris arguta (Kaulf.) Maxon Common in stream and
oak woodland
Polystichum munitum (Kaulf.) Abundant, oak and
C. Presl. spruce woodland,
< 4000 ft


EQUISETACEAE
Equisetum laevigatum A. Braum Common, stream
woodland
Equisetum telmateia Ehrh. ssp. Stream woodland
braunii (Milde) R. L. Hauke

ERICACEAE
Arctostaphylos glandulosa Eastw. Abundant throughout
Arctostaphylos glauca Lindley Chamise chaparral,
destroyed by closely
repeated fires

EUPHORBIACEAE
Chamaesyce melanadenia Chamise chaparral,
(Torrey) Millsp. < 2000 ft
Chamaesyce polycarpa Rare, dry, rocky
(Benth.) Millsp. openings
Chamaesyce serpyllifolia (Pers.) Not common, Tanbark
small Flats
Croton californicus Muell. Arg. Dry, sandy area
Eremocarpus setigerus (Hook.) Occasional, grassy
Benth. areas, < 3000 ft
Euphorbia spathulata Lam. Grassland, < 2000 ft
Ricinus communis L. Weed along roads

FABACEAE
Amorpha californica Nutt. Openings in oaks,
woodland, < 3000 ft
Astragalus gambelianus E. Sheldon Grassy areas, <2000 ft
Lathyrus vestitus Nutt. var. Common vine in oak
alefeldii (T. White) Isely chaparral throughout
Lotus argophullus (A. Gray) Oak woodland, < 4000 ft
E. Greene var. argophullus
Lotus crassifolius (Benth.) Common on firebreaks,
E. Greene burns, < 4500 ft
Lotus hamatus E. Greene Firebreaks
Lotus heermannii (Durand & Hilg.) Openings along streams,
E. Greene chaparral
Lotus micranthus Benth. Firebreaks,openings
Lotus oblongifolius (Benth.) Occasional, stream
E. Greene woodland
Lotus purshianus (Benth.) Occasional, dry
Clements & E. G. Clements open grassy places
Lotus salsuginosus E. Greene Occasional chamise
var. salsuginosus
Lotus scoparius (Nutt.) Ottley Abundant, dry areas and
var. scoparius burns, < 4000 ft
Lotus strigosus (Nutt.) Common throughout
E. Greene
Lotus wrangelianus Dry, grassy openings,
Fischer & C. Meyer < 1500 ft
Lupinus adsurgens E. Drew Collected in 1961 burn
Lupinus bicolor Lindley Occasional
Lupinus formosus E. Greene Open places throughout
var. formosus
Lupinus hirsutissimus Benth. Open places chaparral
Lupinus latifolius J. Agardh. Occasional
var. parishii C.P. Smith
Lupinus longifolius (S. Watson) Abundant on disturbed
Abrams and open areas,
dominant on burns
Lupinus sparsiflorus Benth. Openings in chaparral
Lupinus truncatus Hook. & Arn. Openings grassy places
Medicago lupulina L. Occasional in grassy
areas
Medicago polymorpha L. Common weed
Melilotus indica (L.) All. Roadside weed
Pickeringia montana Nutt. Chamise chaparral,
Bell Cyn. #1, rare
Rupertia physodes (Hook.) Open spots, streams
Grimes
Trifolium albopurpereum Torrey Grassy places, rare
& A. Gray
Trifolium ciliolatum Benth. Grassy places, < 3000 ft
Trifolium gracilentum Torrey & Open, grassy places
A. Gray
Trifolium microcephalum Pursh Occasional, grassy
places
Trifolum obtusiflorum Hook. & Stream woodland, moist
Arn.
Trifolium wildenovii Sprengel Monroe Cyn. only

FAGACEAE
Quercus agrifolia Nee. Dominant in woodland,
var. agrifolia < 3500 ft
Quercus chrysolepis Liebm. Above 4000 ft dominant
in oak woodland,
occasional below
4000 ft
Quercus beberidifolia Liebm. Dominant in oak
chaparral, mostly
< 4000 ft
Quercus engelmannii E. Greene Rare, several
individuals on SW
slope of Johnstone
Peak
Quercus kelloggii X Quercus Rare, only 2 individuals,
wislizenii 5000 ft
Quercus wislizenii A. DC. var. Dominant in oak
frutescens Engelm. chaparral above
4000 ft, common
< 4000 ft

GARRYACEAE
Garrya veatchii Kellogg Abundant in oak
chaparral,
broadleaved

GENTIANACEAE
Centaurium venustrum Common, grassy
(A. Gray) Robinson places, < 2000 ft
Swertia parryi (Torrey) Grassy areas south of
Kuntze San Dimas Dam

GERANIACEAE
Erodium botrys (Cav.) Bertol. Grassy places,
openings, < 2000 ft
Erodium cicutarium (L.) L’ Her. Common in openings
throughout
Erodium macrophyllum Hook. Grassy places, < 2000 ft
& Arn.
Erodium moschatum (L.) L’ Her. Openings on better
sites, < 2000 ft
Geranium carolinianum L. Stream woodland,
oak chaparral

GROSSULARIACEAE
Ribes amarum McClatchie Common in understory
Ribes aureum Pursh Rare, gravel washes,
var. gracillimum south of Forest
(Cov. & Britton) Jepson
Ribes californicum Hook. Common, stream
& Arn. var. hesperium woodland
(McClatchie) Jepson
Ribes indecorum Eastw. Few shrubs in chamise,
< 2000 ft
Ribes malvaceum Sm. Common, cyn.
bottoms throughout
Ribes roezlii Regel Common, oak
woodland, > 4000 ft
Ribes speciosum Pursh One shrub, San Dimas
Guard Station

HYDROPHYLLACEAE
Emmenanthe penduliflora Disturbed areas, burns
Benth.
Eiodictyon crassifolium Benth. Openings, disturbed
areas, west side of
Monroe Cyn.
Eriodictyon trichocalyx Abundant throughout,
A.A. Heller oak,chamise chaparral
Eucrypta chrysanthemifolia Disturbed places
(Benth.) E. Greene var.
chrysanthemifolia
Nemophila menziesii Hook. & Throughout, grassy
Arn. var. menziesii openings
Nemophila menziesii Hook. & Steam woodland,
Arn. var. integrifolia Parish oak chaparral
Phacelia brachyloba (Benth.) Occasional except after
A. Gray 1938 burn
Phacelia cicutaria E. Greene Common in chaparral,
var. hispida(A. Gray) J. Howell abundant after burns
Phacelia curvipes S. Watson Dry Lake only, openings
Phacelia distans Benth. Dry open grassy places,
< 2000 ft
Phacelia grandiflora Benth. Open or disturbed areas
Phacelia imbricata E. Greene Dry openings, burns
ssp.patula (Brand) Heckard
Phacelia longipes A. Gray Roadside south of
Dry Lake
Phacelia minor (Harvey) Thell Common throughout
Phacelia parryi Torrey Rare
Phacelia ramosissima Lehm. Common, abundant
var.latifolia (Torrey) Cronq. in burns
Phacelia viscida (Benth.) Torrey Occasional
Pholistoma auritum (Lindley) Common, < 3000 ft
Lilja.
Turricula parryi (A. Gray) J.F. Macbr. On firebreaks, dominant
after burning chaparral

IRIDACEAE
Sisyrinchium bellum S. Watson Moist, grassy places,
< 2500 ft
JUGLANDACEAE
Juglans californica S. Watson Woodlands, < 4000 ft

JUNCACEAE
Juncus balticus Wild. Woodlands, < 4000 ft
Juncus bufonius L. Only at Big Dalton Dam
Juncus macrophullus Cov. Stream woodland
Juncus oxymeris Englem. Stream woodland
Juncus rugulosus Englem. Stream woodland
Juncus textilis Buchenau Stream woodland

LAMIACEAE
Lepechinia fragrans (E. Greene) Common
Epling
Marrubium vulgare L. Common weed
Mentha piperita L. Weed at Tanbark
Monardella lanceolata A. Gray Common, dry places,
Brown’s Flat
Monardella macrantha A. Gray Dry, exposed openings
Monardella viridis Jepson ssp. Dry openings
saxicola I.M. Johnson
Pycnanthemum californicum Occasional in openings
Torrey
Salvia apiana Jepson Abundant, dry, rocky
places
Salvia columbariae Benth. Common on open
areas and burns
Salvia mellifera E. Greene Abundant in chamise
Scutellaria tuberosa Benth. Grassy openings,
< 2500 ft
Stachys albens A. Gray Common in openings
Trichostema lanceolatum Benth. Grassy areas
Trichostema parishii Vasey Chamise chaparral

LAURACEAE
Umbellularia californica Stream and oak
(Hook. & Arn.) Nutt. woodland at higher
elevations

LILIACEAE
Allium haematochiton S. Watson Grassy areas,
< 2000 ft
Allium peninsulare Lemmon Upper East Fork,
SDEF
Bloomeria crocea (Torrey) Cov. Occasional in
chaparral
Brodiaea terrestris Kellogg Rare, grassy areas,
ssp. kernensis (Hoover) T. Niehaus < 2000 ft
Calochortus albus Benth. Occasional in stream
woodland
Calochortus catalinae S. Watson Common, grasslands,
< 2000 ft
Calochortus clavatus S. Watson Rare
var. gracilis F. Ownbey
Calochortus plummerae E. Greene Occasional in chamise
Calochortus splendens Benth. Grassy areas
Chlorogalum pomeridianum Ofen abundant
(DC.) Kunth
Dichelostema capitatum Allph. Common, open areas
Wood
Fritillaria biflora Lindley Common in grassland,
< 2000 ft
Lilium humboldtii Roezl & Leichtlin Common, < 3000 ft
ssp. ocellatum (Kellogg) Thorne
Muilla maritima (Torrey) S. Watson Throughout,
woodland, chaparral
Yucca whipplei Torrey ssp. parishii Abundant throughout
(M. E. Jones) A.L. Haines
Zigadenus fremontii (Torrey) Not common, found
S. Watson in Little Dalton Cyn.,
chamise


LOASACEAE
Mentzelia congesta Torrey & Disturbed, < 5000 ft
A. Gray
Mentzelia dispersa S. Watson Burns or disturbed,
> 4000 ft
Mentzelia laevicaulis (Hook.) Occasioinal, roadsides,
Torrey & A. Gray dry washes,
throughout
Mentzelia micrantha (Hook. & Burns, disturbed places
Arn.) Torrey & A. Gray

LYTHRACEAE
Lythrum californicum Torrey & Occasional, stream
A. Gray woodland

MALVACEAE
Malacothamnus fasciculatus Openings in chamise,
Torrey & A. Gray < 4000 ft

NYCTAGINACEAE
Mirabilis californica A. Gray Dry, stony places

OLEACEAE
Fraxinus dipetala Hook & Oak chaparral and
Arn. stream woodland
Fraxinus latifolia Benth. Rare, oak chaparral,
one shrub, Bell #4
ONAGRACEAE
Camissonia bistorta (Torrey & Dry washes, south of
A. Gray) Raven SDEF
Camissonia californica (Torrey Burns, disturbed places
& A. Gray) Raven
Camissonia hirtella (E. Greene) Disturbed areas
Raven
Camissonia ignota (Jepson) Dry washes, low
Raven elevation
Camissonia micrantha Burns, disturbed areas
(Sprengell) Raven
Camissonia strigulosa (Fischer Recorded from Brown’s
& C. Meyer) Raven Flat only
Clarkia dudleyana (Abrams) Common, grassy areas
J. F. Macbr.
Clarkia epilobioides (Nutt.) Occasional, < 2500 ft
Nelson & J.F. Macbr.
Clarkia purpurea (Curtis) Nelson & Low elevation,
J.F. Macbr. ssp. quadrivulnera grassy areas
(Douglas) Harlan Lewis &
M. Lewis
Clarkia rhomboidea Douglas Dry lake, open areas,
Fern Cyn.
Clarkia similis Harlan Lewis East Fork, San Dimas
& Ernst Cyn.
Clarkia unguiculata Lindley Shady places, chamise
Epilobium canum (E. Greene) Common throughout
Raven ssp. canum
Epilobium canum (E. Greene) Not common, Tanbark
Raven ssp. latifolium (Hook.) Flats and Fern Cyn.
Raven
Epilobium ciliatum Raf. ssp. Stream woodland
ciliatum
Epilobium glaberrimum Barbey Stream woodland
Epilobium minutum Lehm. Dry openings, chamise,
native to more
N. sites
Epilobium brachycarpum C. Presl Openings, disturbed
dry places in chamise
chaparral
Gayophytum ramosissimum Rare, grassy areas,
Torrey & A. Gray 5000 ft, Dry Lake
Oenothera elata Kunth ssp. Rare, stream woodland
hookeri (Torrey & A. Gray)
W. Dietr. & W. L. Wagner

ORCHIDACEAE
Epipactis gigantea Hook. Rare in seep areas
Piperia elegans(Lindley) Rydb. Occasional in
woodlands
Piperia unalascensis (Sprengell) Rare, grassy areas,
Rydb. < 2000 ft

OROBANCHACEAE
Orobanche bulbosa G. Beck Parasitic on chamise
roots
Orobanche fasciculata Nutt. Parasitic
Orobanche uniflora L. Parasitic

OXALIDACEAE
Oxalis albicans Kunth ssp. Sage brush and grass,
californica (Abrams) Eiten < 2000 ft
Oxalis corniculata L. Weed, Tanbark lawn

PAEONIACEAE
Paeonia californica Torrey & Common in open
A. Gray chamise, < 3000 ft

PAPAVERACEAE
Dicentra chrysantha (Hook. & Common on disturbed
Arn.) Walp. places, burned oak
chaparral
Eschscholzia caespitosa Benth. Grassy places
Eschscholzia californica Cham. Grassy places
Meconella denticulata E. Greene Stream, oaks
Papaver californicum A. Gray Uncommon
Platystemon californicus Benth. Rare, Dalton Cyn.

PINACEAE
Abies concolor (Gordon & Glend.) Scattered trees, Fern
Lindley Cyn., 5000 ft
Pinus lambertiana Douglas Few trees, 5000 ft
Pinus ponderosa Laws. Dominant tree in
Brown’s Flat,
scattered elsewhere
Pseudotsuga macrocarpa (Vasey) Dominant, Big Cone
Mayr Spruce Forest

PLANTAGINACEAE
Plantago erecta Morris Common, < 2000 ft
Plantago virginica L. Weed, Lawn,
Tanbark Flats
PLATANACEAE
Platanus racemosa Nutt. Dominant, dry stream,
< 4500 ft

POACEAE
Achnatherum coronata Abundant in openings
(Thurber) Barkworth
Agrostis pallens Trin. Occasional, open
grassy areas
Agrostis exarata Trin. Occasioinal, oak
chaparral
Agrostis virids Gouan Common, < 3500 ft
Aristida adscensionis L. Dry open places,
< 3500 ft
Aristida divaricata Willd. Disturbed area, chamise
chaparral
Aristida purpurea Nutt. Dry openings, chamise
var. parishii (A. Hitchc.)
K.W. Allred
Avena barbata Link Common weed
Avena sativa L. Occasional weed
Bothriochoa barbinodis Chamise, dry slopes,
(Lagasca) Herter < 2000 ft
Bromus arenarius Labill. Weed, disturbed areas
Bromus carinatus Hook. Common in woodlands
& Arn. and oak chaparral
Bromus carinatus Hook. Monroe Cyn. stream
& Arn. var. carinatus channel only
Bromus diandrus Roth Dominant grass in
openings, < 4000 ft
Bromus grandis (Shear) Abundant throughout
A. Hitchc.
Bromus hordeaceus L. Common weed
Bromus orcuttianus (Shear) Disturbed areas,
A. Hitchc. < 4000 ft
Bromus madritensis L. ssp. Dominant grass
rubens (L.) Husnet throughout forest
Bromus tectorum L. In openings above
5000 ft
Bromus trinii Desv. Rare, Tanbark Flats
Cenchrus incertus M. Curtis Weed
Cynodon dactylon (L.) Pers. Common weed
Digitaria sanguinalis (L.) Scop. Occasional weed
Echinochloa crus-galli (L.) Weed, introduced,
P. Beaux. more common
farther N.
Elymus glaucus Buckley Occasional in openings
Elymus multisetus (J.G. Smith) Herbarium collection
Burtt Davy
Elymus trachycaulus (Link) Abundant throughout,
Shinn. ssp. subsecundus native to more
(Link) Gould N. sites
Gastridium ventricosum (Gouan) Rare, openings and
Schinz & Thell distrubed places
Hordeum brachyantherum Weed
Nevski ssp. californicum
(Covas & Stebb.) V. Bothmer,
N. Jacobsen & O. Seberg

Hordeum murinum L. ssp. Weed
glaucum (Steudel) Tzvelev
Imperata brevifolia Vasey Rare in 2 wet seeps,
San Dimas Cyn.,
2000 ft
Koeleria macrantha (Ledeb.) Meadow, 1400 ft
Spreng.
Lamarckia aurea (L.) Moench. Common weed
Leymus condensatus (C. Presl.) Common throughout
A. Love
Melica imperfecta Trin. Abundant, open
disturbed areas
Muhlenbergia microsperma Only outside SDEF,
(DC.) Kunth Dalton Wash
Muhlenbergia rigens (Benth.) Abundant throughout
Hitchc.
Nassella lepida (A. Hitchc.) Openings, disturbed
Barkworth areas
Nassella pulchra (A. Hitchc.) Openings in chamise,
Barkworth oak
Pennisetum setaceum (Forsk.) One recording,
Chiiov Monroe Cyn.
Phalaris minor Retz. Rare, firebreaks
Poa annua L. Weed and grasslands
Poa secunda J.Presl. ssp. Occasioinal, grassy
secunda places, abundant,
Dry Lake, native
to Great Basin
Polypogon monspelliensis (L.) Common, moist, open
Desf. places
Setaria pumila (Poiret) Roemer Weed
& Schultes
Setaria viridis (L.) Beauv. Occasionally on waste
Sorghum halepense (L.) Pers. Weed, wet places
Vulpia myuros (L.) C. Gmelin Common in openings,
var. hirsuta (Hackel) Asch. burns
& Graebner
Vulpia octoflora (Walter) Occasional in
Rydb. var. hirtella (Piper) disturbed areas
Henrard
Vulpia microstachys (Nutt.) Occasional in grassy
Benth. var. pauciflora (Beal) areas
Lonard & Gould

POLEMONIACEAE
Allophyllum divaricatum (Nutt.) Common in shady,
A.D. Grant & V. Grant grassy areas,
dominant herb in
woodland and oak
chaparral after fire
Eriastrum sapphirinum (Eastw.) Common
H. Mason
Gilia achilliefolia Benth. ssp. Grassy areas,
multicaulis (Benth.) V. Grant & < 2000 ft
A.D. Grant
Gilia angelensis V. Grant. Dalton Cyn.
Gilia capitata Sims ssp. Occasional
abrotanifolia (E. Greene) V. Grant.
Gilia latiflora (A. Gray) Occasional, common
A. Gray in burns
Ipomopsis tenuifolia (A. Gray) In grassy areas,
V. Grant dominant in all
trpes after burns
Leptodactylon californicum Dry areas and burns
Hook. & Arn. throughout
Linanthus breviculus (A. Gray) Rare
E. Greene
Linanthus dianthiflorus (Benth.) Not common,
E. Greene grassland, < 2000 ft
Linanthus liniflorus (Benth.) Rare
E. Greene
Navarretia atractyloides (Benth.) Chamise, low
Hook. & Arn. elevations

POLYGONACEAE
Chorizanthe procumbens Nutt. Only in san Dimas Wash
Chorizanthe staticoides Benth. Often abundant,
< 4000 ft
Eriogonum davidsonii E. Greene. Ponderosa Pine, dry
rocky places
Eriogonum elongatum Benth. In chamise chaparral
var. elongatum
Eriogonum fasciculatum Benth. Abundant, often
var. foliolosum (Nutt.) Abrams dominant, sage,road
slopes
Eriogonum fasciculatum Benth. Common in openings,
var. polifolium (A. DC.) Torrey > 4500 ft
& A. Gray
Eriogonum gracile Benth. Dry, rocky openings
Eriogonum saxatile S. Watson Dry openings, woodland
Polygonum arenastrum Boreau Rare, weed, disturbed
areas
Pterostegia drymarioides Common, shady places
Fischer & C. Meyer
Rumex crispus L. Weed of openings
Rumex obtusifolius L. Openings in stream
woodland, weed
Rumex salicifolius J. A. Weinm. Stream woodland, weed

POLYPODIACEAE
Polypodium californicum Kaulf. Common, often
abundant

PORTULACACEAE
Calandrinia ciliata (Ruiz Lopez Occasional
& Pavon) DC.
Calyptridium monandrum Nutt. Occasional, disturbed
areas
Claytonia perfoliata Willd. Abundant, especially
ssp. perfoliata after fire in
woodland
PRIMULACEAE
Anagallis arvensis L. Weed, grassy areas
Dodecatheon clevelandii Grassy open places,
E. Greene < 2000 ft

PTERIDACEAE
Adiantum capillus-veneris L. Common, stream
woodland
Adiantum jordanii C. Mueller Stream and oak
Adiantum aleuticum (Rupr.) woodlands
C.A. Paris
Aspidotis californica (Hook.) Occasional, shady
Copel. slopes
Cheilanthus covillei Maxon Common, dry, rocky
slopes
Pellaea andromedifolia Common, dry, rocky
Fee places
Pellaea mucronata Common, cliffs, dry,
(D. Eaton) D. Eaton rocky slopes
Pentagrama triangularis Common, throughout
(Kaulf.) Yatskievych,
Windham & Wollenweber

RANUNCULACEAE
Aquilegia formosa Fischer Common throughout
in moist areas
Clematis lasiantha Nutt. Common throughout
Clematis ligusticifolia Nutt. Stream woodland,
< 3000 ft
Clematis pauciflora Nutt. Occasional in sage
chaparral
Delphinium cardinale Hook. Common in stream
woodlands
Delphinium parryi A. Gray Common, dry, grassy
areas
Delphinium patens Benth. Common in openings
throughout
Ranunculus californicus Only on west side of
Benth. Johnstone Peak
Thalictrum fendleri A. Gray Occasional, stream
var. polycarpum Torrey woodland

RHAMNACEAE
Ceanothus crassifolius Torrey Usually a dominant in
chamise chaparral
Ceanothus integerrimus Abudant in oak
Hook. & Arn. woodland, > 4000 ft
especially after
recent burns
Ceanothus leucodermis E. Dominant shrub in
Greene chaparral, > 4000 ft,
occasional below
Ceanothus oliganthus Nutt. A dominant in oak
chaparral, < 4000 ft,
for 25 years after
burning
Rhamnus californica Eschsch. Common understory,
throughout
Rhamnus crocea Nutt. Occasional, dry washes,
< 2000 ft
Rhamnus ilicifolia Kellogg Common, chaparral

ROSACEAE
Adenostoma fasciculatum Dominant throughout
Hook. & Arn.
Cercoparpus betuloides Abundant in chamise
Torrey & A. Gray and oak chaparral
Cercocarpus ledifolius Nutt. One shrub in oak
chaparral, Brown’s
Flat
Heteromeles arbutifolia Abundant in oak
(Lindley) Roemer chaparral, < 4500 ft
Holodiscus discolor (Pursh) Uncommon, Johnstone
Maxim. Peak, 3000 ft
Potentilla glandulosa Lindley Common throughout
Prunus ilicifolia (Nutt.) Walpl. Common in oak
chaparral
Rosa californica Chami & Schldl. Common, stream
woodland
Rubus ursinus Cham. & Schldl. Common, stream
woodland
RUBIACEAE
Galium angustifolium Nutt. Common, chamise
chaparral, also burns
in woodland
Galiium aparine L. Common, shaded areas
Galiium grande McClatche Common in oak
woodland, burns
Galium nuttallii A. Gray Frequent, chamise
chaparral
Sherardia arvensis L. Weed, Tanbark Flats

SALICACEAE
Populus fremontii S. Scattered trees in San
Watson ssp. fremontii Dimas Cyn., Flume
#6 to reservoir
Populus balsamifera L. Dominant in stream
ssp. trichocarpa woodland
(Torrey & A. Gray)
Brayshaw
Salix exigua Nutt. Occasional below
Big Dalton Dam
Salix laevigata Bebb. Common, stream
woodland, < 3000 ft
Salix lucida Muhlenb. Stream woodlands,
ssp. lasiandra (Benth.) < 3000 ft
E. Murray
Salix lasiolepis Benth. Stream woodlands
throughout


SAXIFRAGACEAE
Boykinia rotundifolia C. Parry Common
Heuchera elegans Abrams Only from a rocky point,
south of Dry Lake,
5000 ft
Lithophragma affine A. Gray Openings throughout
Lithophragma heterophyllum Stream and woodland
(Hook. & A. Gray) Torrey throughout
A. Gray
Saxifraga californica E. Greene In shady places, oak
chaparral, woodlands


SCROPHULARIACEAE
Antirrhinum coulterianum Benth. Grassy areas and
disturbed places
Antirrhinum kelloggii E. Greene Dry slopes, <2000 ft
Antirrhinum multiflorum Pennell Disturbed areas, burns
Castilleja applegatei Fern. Collected in Fern Cyn.
burn, more common
farther north
Castilleja exserta (A.A. Heller) Grassy, open places,
Chuang & Heckard < 2000 ft
Castilleja foliolosa Hook. & Arn. Common, dry
washes, openings
Castilleja miniata Hook. Occasional in
woodlands
Castilleja minor (A. Gray) Occasional, stream
A. Gray ssp. spiralis woodland
(Jepson) Chuang & Hechard
Collinsia childii A. Gray Dry, shaded places, oak
woodland, chaparral,
burns
Collinsia heterophylla Buist Oak woodland, grassy
var. austromontana Newsom areas throughout
Collinsia parryi A. Gray Disturbed or open areas
Cordylanthus rigidus (Benth.) Disturbed places
Jepson ssp. brevibracteatus throughout, burns
(A. Gray) Munz
Keckiella cordifolia (Benth.) Common vine
Straw throughout
Keckiella ternata (Torrey) Common in chamise
Straw var. ternata chaparral, abundant
on burns
Linaria canadensis (L.) Sandy, Dalton Wash,
Dum.-Cours. var. 1200 ft
texana (Scheele) Pennell
Mimulus aurantiacus Curtis Abundant throughout
Mimulus bolanderi A. Gray Burn in Fern #1, native
farther north
Mimulus brevipes Benth. Common, chamise and
oak chaparral
Mimulus cardinalis Benth. Common, stream
woodland, oak
Mimulus floribundus Lindley Stream woodland
throughout
Mimulus fremontii (Benth.) San Dimas Wash
A. Gray
Mimulus guttatus DC. Abundant, stream
woodland
Mimulus pilosus (Benth.) Stream woodland,
S. Watson chaparral
Pedicularis densiflora Hook. Rare, Monroe Cyn.
Penstemon heterophyllus Occasional, openings
Lindley
Penstemon spectabilis Thurber Common, chaparral,
abundant on burns
Scrophularia californica Cham. Throughout in oak
& Schldl. ssp. floribunda (E. chaparral, woodlands,
Greene) Shaw abundant on burns
Verbascum blattaria L. Weed
Verbascum virgatum Stokes Weed

SELAGINELLACEAE
Selaginella bigelovii L. Underw. Abundant, open areas

SOLANACEAE
Datura wrightii Regel Sandy, gravelly open
places
Datura stramonium L. Disturbed places
Nicotiana glauca Graham Common, disturbed
areas
Physalis philadelphica Lam. Weed at Tanbark
Solanum douglasii Dunal Shady, open places
Solanum xanti A. Gray Common in openings,
abundant on burns


TYPHACEAE
Typha latifolia L. Marshy places, along
streams
URTICACEAE
Urtica dioica L. ssp. Stream woodland
holosericea (Nutt.) Thorne

VALERIANACEAE
Plectritis ciliosa (E. Greene) Occasional, stream
Jepson ssp. insignis woodland
(Suksd.) D. Morey

VERBENACEAE
Verbena lasiostachys Link Occasional in shady
places
VIOLACEAE
Viola pedunculata Torrey & Rare, < 2000 ft
A. Gray
Viola purpurea Kellogg ssp. Common grassy
purpurea areas, Dry Lake
Viola sheltonii Torrey Occasioinal oak
woodland, < 4000 ft


VISCACEAE
Phoradendron villosum Common throughout,
(Nutt.) Nutt. parasite on oak
and many others
VITACEAE
Vitis girdiana Munson Stream woodland,
< 3000 ft
ZYGOPHYLLACEAE
Tribulus terrestris L. Weed