Western Hackberry

Celtis reticulata

Western Redbud

Cercis occidentalis

Rose Thistle

Cirsium andersonii

Franciscan Thistle

Cirsium andrewsii

Indian Thistle

Cirsium brevistylum

Peregrine Thistle

Cirsium cymosum

Peregrine Thistle

Cirsium cymosum var. cymosum

Douglas' Thistle

Cirsium douglasii

Douglas' Thistle

Cirsium douglasii var. breweri

Douglas' Thistle

Cirsium douglasii var. douglasii

Fountain Thistle

Cirsium fontinale

Crystal Springs Fountain Thistle

Cirsium fontinale var. fontinale

Suisun Thistle

Cirsium hydrophilum

Suisun Thistle

Cirsium hydrophilum var. hydrophilum

Mount Tamalpais Thistle

Cirsium hydrophilum var. vaseyi

Cirsium inamoenum

Cobweb Thistle

Cirsium occidentale

Snowy Thistle

Cirsium occidentale var. candidissimum

Compact Cobwebby Thistle

Cirsium occidentale var. compactum

Coulter's Thistle

Cirsium occidentale var. coulteri

Cobwebby Thistle

Cirsium occidentale var. occidentale

Venus Thistle

Cirsium occidentale var. venustum

Brownie Thistle

Cirsium quercetorum

Fewleaf Thistle

Cirsium remotifolium

Pacific Fringed Thistle

Cirsium remotifolium var. odontolepis

Klamath Thistle

Cirsium remotifolium var. rivulare

Meadow Thistle

Cirsium scariosum

Southern Meadow Thistle

Cirsium scariosum var. citrinum

Wavyleaf Thistle

Cirsium undulatum

Bastard Toadflax

Comandra umbellata

Bastard Toad Flax

Comandra umbellata ssp. californica

Brown Dogwood

Cornus glabrata

Pacific Dogwood

Cornus nuttallii

Red Osier Dogwood

Cornus sericea

Western Dogwood

Cornus sericea ssp. occidentalis

Creek Dogwood

Cornus sericea ssp. sericea

Miner's Dogwood

Cornus sessilis

Beaked Hazelnut

Corylus cornuta

California Hazel

Corylus cornuta ssp. californica

Crataegus castlegarensis

Black Hawthorn

Crataegus douglasii

Beach Strawberry

Fragaria chiloensis

Woodland Strawberry

Fragaria vesca

Mountain Strawberry

Fragaria virginiana

Coffeeberry

Frangula californica

California Coffeeberry

Frangula californica ssp. californica

Western California Coffeeberry

Frangula californica ssp. occidentalis

Hoary Coffeeberry

Frangula californica ssp. tomentella

Cascara Sagrada

Frangula purshiana

Sierra Coffeeberry

Frangula rubra

Red Buckthorn

Frangula rubra ssp. rubra

California Ash

Fraxinus dipetala

Oregon Ash

Fraxinus latifolia

Velvet Ash

Fraxinus velutina

Bicknell's Cranesbill

Geranium bicknellii

Carolina Crane's-bill

Geranium carolinianum

Sticky Geranium

Geranium viscosissimum

Serpentine Sunflower

Helianthus bolanderi

California Sunflower

Helianthus californicus

Cusick's Sunflower

Helianthus cusickii