ACERACEAE, maple family
   Acer macrophyllum, big-leaf maple
 

ANACARDIACEAE, cashew family
   Toxicodendron diversilobum, poison oak
 

APIACEAE, carrot family
   Osmorhiza chilensis, mountain sweet cicely
   Sanicula crassicaulis, Pacific snakeroot
 

ARALIACEAE, ginseng family
   Aralia californica, elk clover
 

ASTERACEAE, sunflower family

Anthemideae, mayweed tribe
   Artemisia douglasiana, California mugwort

Astereae, aster tribe
   Baccharis pilularis, coyote brush
   Conyza canadensis, horseweed

Cichorieae, chicory tribe
   Agoseris (grandiflora?), mountain dandelion
   Agoseris (heterophylla?), mountain dandelion

Inuleae, everlasting tribe
   Anaphalis margaritacea, pearly everlasting
   Gnaphalium californicum, green everlasting
   Gnaphalium purpureum, purple cudweed

Madieae, tarweed tribe
   Madia gracilis, slender tarweed
   Madia madioides, woodland madia
   Psilocarphus tenellus, slender woolly-heads

Senecioneae, groundsel tribe
   Petasites frigidus var. palmatus, western coltsfoot
 

BETULACEAE, hazel family
   Corylus cornuta var. californica, California hazelnut
 

BLECHNACEAE, deer fern family
   Woodwardia fimbriata, giant chain fern
 

BRASSICACEAE, mustard family
   Barbarea orthoceras, American winter cress
   Cardamine oligosperma, western bittercress
 

CAPRIFOLIACEAE, honeysuckle family
   Lonicera hispidula var. vacillans, hairy honeysuckle
   Sambucus mexicana, blue elderberry
   Symphoricarpos rivularis, common snowberry
 

CUCURBITACEAE, gourd family
   Marah fabaceus, valley manroot
 

CYPERACEAE, sedge family
   Carex sp., sedge
 

DENNSTAEDTIACEAE, bracken family
   Pteridium aquilinum var. pubescens, bracken fern
 

DRYOPTERIDACEAE, wood fern family
   Cystopteris fragilis, brittle fern
   Dryopteris arguta, coastal wood fern
   Polystichum munitum, western sword fern
 

EQUISETACEAE, horsetail family
   Equisetum sp., horsetail (near headquarters)
   Equisetum telmateia ssp. braunii, giant horsetail (in woods)
 

ERICACEAE, heath family
   Arbutus menziesii, Pacific madrone
 

FABACEAE, pea familv
   Lathyrus sp., wild pea
   Lotus micranthus, miniature trefoil
   Lotus purshianus var. purshianus, spanish clover
   Lupinus bicolor, miniature lupine
   Trifolium willdenovii, tomcat clover
 

FAGACEAE, beech family
   Lithocarpus densiflorus, tanbark oak
   Quercus agrifolia, coast live oak
 

GROSSULARIACEAE, gooseberry family
   Ribes sanguineum var. glutinosum, flowering currant
 

HIPPOCASTANACEAE, horse-chestnut family
   Aesculus californica, California buckeye
 

HYDROPHYLLACEAE, phacelia family
   Eriodictyon californicum, yerba santa
   Nemophila heterophylla, vari-leaf nemophila
 

IRIDACEAE, iris family
   Iris macrosiphon, slender-tubed iris
 

JUNCACEAE, rush family
   Juncus patens, common rush
 

LAMIACEAE, mint family
   Satureja douglasii, yerba buena
   Stachys ajugoides var. rigida, rigid hedge nettle
 

LAURACEAE, avocado family
   Umbellularia californica, California bay, California laurel
 

LILIACEAE, lily family
   Calochortus albus, white fairy lantern
   Disporum hookeri, Hooker's fairybell
   Fritillaria affinis, checker lily
   Smilacina stellata, slim solomon
 

ONAGRACEAE, evening primrose family
   Epilobium brachycarpum, parched fireweed
 

PAPAVERACEAE, poppy family
   Eschscholzia californica, California poppy
 

PINACEAE, pine family
   Pseudotsuga menziesii var. menziesii, Douglas-fir
 

POACEAE, grass family

Aveneae, oat tribe
   Deschampsia elongata, slender hair grass

Festuceae, fescue tribe
   Bromus carinatus, California brome
   Melica torreyana, Torrey's melica
   Poa secunda ssp. secunda, one-sided bluegrass
   Poa sp.
   Vulpia myuros var. hirsuta, foxtail fescue

Hordeae, barley tribe
    Elymus glaucus, blue wild rye
   Leymus triticoides (?), alkali rye
 

POLEMONIACEAE, phlox family
   Collomia heterophylla, varied-leaved collomia
   Navarretia squarrosa, skunkweed
 

POLYGONACEAE, buckwheat family
   Rumex sp., dock
 

POLYPODIACEAE, polypody family
   Polypodium californicum, California polypody
 

PORTULACACEAE, purselane family
   Claytonia perfoliata, miner's lettuce
 

PRIMULACEAE, primrose family
   Trientalis latifolia, Pacific starflower
 

PTERIDACEAE, brake family
   Adiantum jordanii, California maidenhair
   Adiantum aleuticum, five-finger fern
   Pentagramma triangularis, goldenback fern
 

RHAMNACEAE, buckthorn family
   Ceanothus sp., wild lilac
 

ROSACEAE, rose family
   Fragaria vesca, wood strawberry
   Heteromeles arbutifolia, toyon
   Holodiscus discolor, creambush, ocean spray
   Potentilla glandulosa, sticky cinquefoil
   Rosa californica, California rose
   Rosa gymnocarpa, wood rose
   Rubus parviflorus, thimbleberry
   Rubus ursinus, California blackberry
 

RUBIACEAE, madder family
   Galium aparine, goose grass, bedstaw
   Galium porrigens, climbing bedstraw
 

SAXIFRAGACEAE, saxifrage family
   Heuchera micrantha, alum root
 

SCROPHULARIACEAE, snapdragon family
   Scrophularia californica, California figwort
 

SOLANACEAE, nightshade family
   Solanum umbelliferum, blue witch
 

TAXODIACEAE, bald cypress family
   Sequoia sempervirens, coast redwood
 

VERBENACEAE, vervain family
   Verbena lasiostachys, California vervain
 

VIOLACEAE, violet family
   Viola ocellata, western heart's ease

These are the alien species we noted, species introduced by man's agency to the site; most are Mediterranean weeds. The Agropyron (a type of wheat grass) was probably introduced in an erosion control mix.

Weeds were predictably in evidence around the house and in the large cleared area. Two woody alien species are a matter of immediate and particular concern:

• Scotch broom (Cytisus scoparius, Fabaceae) is a very serious weed.
• Himalyan blackberry (Rubus discolor, Rosaceae) is a blackberry with stout thorns, with clusters of flowers borne at the ends of the branches. This plant has taken over a riparian area in Upper Silver Creek Park, choking out desirable native vegetation and making an impenetrable tangle.

APIACEAE, carrot family
   Anthriscus caucalis, bur chervil
   Torilis arvensis
 

APOCYNACEAE, dogbane family
   Vinca major, greater periwinkle
 

ASTERACEAE, sunflower family

Cichorieae, chicory tribe
   Crepis vesicaria ssp. taraxacifolia, weedy hawksbeard
   Lactuca serriola, prickly lettuce
   Sonchus asper, prickly sow thistle
    Sonchus oleraceus, common sow thistle
    Taraxacum officinale, common dandelion
   Tragopogon porrifolius, salsify

Cynareae, thistle tribe
   Carduus pycnocephalus, Italian thistle
   Centaurea solstitialis, yellow star-thistle
   Cirsium vulgare, bull thistle

Inuleae, everlasting tribe
   Filago gallica, narrow-leaved filago
   Gnaphaliun luteo-album, weedy cudweed
 

CARYOPHYLLACEAE, pink family
   Cerastium fontanum ssp. vulgare, large mouse-ear chickweed
   Cerastium glomeratum, mouse-ear chickweed
    Lychnis coronaria, rose campion
    Polycarpon tetraphyllum, four-leaved allseed
   Silene gallica, windmill pink
 

CONVOLVULACEAE, morning-glory family
    Convolvulus arvensis, field bindweed
 

BRASSICACEAE, mustard family
   Brassica (?), mustard
    Capsella bursa-pastoris, sheperd's purse
    Sisymbrium officinale, hedge mustard
 

EUPHORBIACEAE, spurge family
   Chamaesyce supina, spotted spurge
    Euphorbia peplus, petty spurge
 

FABACEAE, pea family
   Cytisus scoparius, scotch broom
   Lotus corniculatus, bird's foot trefoil
   Medicago polymorpha, bur clover
   (Medicago polymorhpa var. brevispina, spineless bur clover)
   Melilotus indica, indica, sourclover
   Trifolium pratense, red clover
   Vicia sativa, farmer's vetch
 

GERANIACEAE, geranium family
   Erodium cicutarium, red-stemmed filaree
   Geranium dissectum, cut-leaved geranium
 

LAMIACEAE, mint family
   Mentha spicata, spearmint
 

OXALIDACEAE, wood sorrel family
   Oxalis corniculata, creeping wood sorrel
 

PLANTAGINACEAE, plantain family
   Plantago lanceolata, English plantain
 

POACEAE, grass family

Aveneae, oat tribe
   Aira caryophyllea, silver European hairgrass
   Avena barbata, slender wild oat
   Avena fatua, wild oat

Chlorideae, grama tribe
   Cynodon dactylon, bermuda grass

Festuceae, fescue tribe
   Briza maxima, rattlesnake grass
   Bromus diandrus, ripgut brome
   Bromus hordeaceus, soft chess
    Bromus madritensis var. madritensis, Spanish brome
   Dactylis glomerata, orchard grass
   Poa annua, annual bluegrass
   Poa pratensis var. pratensis, Kentucky bluegrass
    Vulpia bromoides, six-week's fescue
   Vulpia myuros var. myuros, rattail fescue

Hordeae, barley tribe
   Elymus lanceolatus ssp. lanceolatus, thickspike wheatgrass (native elsewhere in California)
   Hordeum marinum ssp. leporinum, farmer's foxtail
   Hordeum vulgare, barley
    Lolium multiflorum, Italian ryegrass
   (Lolium multiflorum var. ramosum)
   Lolium perenne, perennial ryegrass

Phalarideae, canary grass tribe
    Phalaris paradoxa
 

PRIMULACEAE, primrose family
   Anagallis arvensis, scarlet pimpernel
 

ROSACEAE, rose family
   Rubus discolor, Himalayan blackberry
   Sanguisorba minor ssp. muricata, garden burnet
 

SCROPHULARIACEAE, snapdragon family
   Cymbalaria muralis, kenilworth ivy
 

VALERIANACEAE, valerian family
   Centranthus ruber, red valerian