Stiffbranch Bird's Beak
Cordylanthus rigidus
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Slender Bird's Beak
Cordylanthus tenuis
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Slender Bird's Beak
Cordylanthus tenuis ssp. tenuis
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California Aster
Corethrogyne filaginifolia
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Moss Landing Common Sandaster
Corethrogyne filaginifolia 'Moss Landing'
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Silver Carpet Aster
Corethrogyne filaginifolia 'Silver Carpet'
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Smart Aster Common Sandaster
Corethrogyne filaginifolia 'Smart Aster'
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Brown Dogwood
Cornus glabrata
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Western Dogwood
Cornus sericea ssp. occidentalis
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Beaked Hazelnut
Corylus cornuta
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California Hazel
Corylus cornuta ssp. californica
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Water Pygmyweed
Crassula aquatica
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Pygmy-weed
Crassula connata
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Black Hawthorn
Crataegus douglasii
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Klamath Hawthorn
Crataegus gaylussacia
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Baker's Hawksbeard
Crepis bakeri
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Limestone Hawksbeard
Crepis intermedia
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Modoc Hawksbeard
Crepis modocensis
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Hall's Meadow Hawksbeard
Crepis runcinata ssp. hallii
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Alkali Weed
Cressa truxillensis
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Spring Gold
Crocidium multicaule
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Turkey Mullein
Croton setiger
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Wilkes' Cryptantha
Cryptantha ambigua
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Bearded Cryptantha
Cryptantha barbigera
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Coast Range Cryptantha
Cryptantha corollata
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Gravel Cryptantha
Cryptantha decipiens
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Hedgehog Cryptantha
Cryptantha echinella
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Flaccid Cryptantha
Cryptantha flaccida
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Slender Cryptantha
Cryptantha gracilis
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Common Cryptantha
Cryptantha intermedia
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Redroot Cryptantha
Cryptantha micrantha
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Tejon Cryptantha
Cryptantha microstachys
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Milo Baker's Cryptantha
Cryptantha milobakeri
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Mojave Cryptantha
Cryptantha mohavensis
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Prickly Popcorn Flower
Cryptantha muricata
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Colusa Cryptantha
Cryptantha nemaclada
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Nevada Catseye
Cryptantha nevadensis
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Nevada Cryptantha
Cryptantha nevadensis var. nevadensis
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Sharp-nut Cryptantha
Cryptantha oxygona
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Wingnut Cryptantha
Cryptantha pterocarya
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Beaked Cryptantha
Cryptantha rostellata
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Slender Cryptantha
Cryptantha sparsiflora
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Torrey's Cryptantha
Cryptantha torreyana
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Watson's Cryptantha
Cryptantha watsonii
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Arizona Cypress
Cupressus arizonica
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San Joaquin Dodder
Cuscuta brachycalyx
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Chaparral Dodder
Cuscuta californica
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Chaparral Dodder
Cuscuta occidentalis
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Canyon Dodder
Cuscuta subinclusa
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Golden Cholla
Cylindropuntia echinocarpa
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Indian Springparsley
Cymopterus aboriginum
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Panamint Springparsley
Cymopterus panamintensis
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Widewing Springparsley
Cymopterus purpurascens
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Rock Springparsley
Cymopterus terebinthinus var. petraeus
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Black Flatsedge
Cyperus niger
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False Nutsedge
Cyperus strigosus
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Brittle Bladderfern
Cystopteris fragilis
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Searls' Prairie Clover
Dalea searlsiae
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Fringed Water-plantain
Damasonium californicum
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One-spike Oat Grass
Danthonia unispicata