Western Dogwood
Cornus sericea ssp. occidentalis
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Creek Dogwood
Cornus sericea ssp. sericea
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Miner's Dogwood
Cornus sessilis
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Bunchberry
Cornus unalaschkensis
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Scrambled Eggs
Corydalis aurea
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Sierra Fumewort
Corydalis caseana
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Sierra Corydalis
Corydalis caseana ssp. caseana
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Beaked Hazelnut
Corylus cornuta
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California Hazel
Corylus cornuta ssp. californica
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Viviparous Foxtail Cactus
Coryphantha vivipara
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Water Pygmyweed
Crassula aquatica
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Pygmy-weed
Crassula connata
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Smooth-seed Pygmyweed
Crassula solieri
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Crataegus castlegarensis
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Black Hawthorn
Crataegus douglasii
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Klamath Hawthorn
Crataegus gaylussacia
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Tapertip Hawksbeard
Crepis acuminata
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Baker's Hawksbeard
Crepis bakeri
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Baker's Hawksbeard
Crepis bakeri ssp. bakeri
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Cusick's Hawksbeard
Crepis bakeri ssp. cusickii
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Crepis bakeri ssp. idahoensis
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Limestone Hawksbeard
Crepis intermedia
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Modoc Hawksbeard
Crepis modocensis
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Modoc Hawksbeard
Crepis modocensis ssp. modocensis
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Modoc Hawksbeard
Crepis modocensis ssp. subacaulis
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Mountain Hawksbeard
Crepis monticola
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Dwarf Alpine Hawksbeard
Crepis nana
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Western Hawksbeard
Crepis occidentalis
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Largeflower Hawksbeard
Crepis occidentalis ssp. conjuncta
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Largeflower Hawksbeard
Crepis occidentalis ssp. costata
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Largeflower Hawksbeard
Crepis occidentalis ssp. occidentalis
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Largeflower Hawksbeard
Crepis occidentalis ssp. pumila
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Nakedstem Hawksbeard
Crepis pleurocarpa
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Fiddleleaf Hawksbeard
Crepis runcinata
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Crepis runcinata ssp. andersonii
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Hall's Meadow Hawksbeard
Crepis runcinata ssp. hallii
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Alkali Weed
Cressa truxillensis
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Alderson's Rush-rose
Crocanthemum aldersonii
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Island Rush-rose
Crocanthemum greenei
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Common Sun Rose
Crocanthemum scoparium
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Crocanthemum scoparium var. scoparium
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Crocanthemum scoparium var. vulgare
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Bisbee Peak Rush Rose
Crocanthemum suffrutescens
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Spring Gold
Crocidium multicaule
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Rock Crossosoma
Crossosoma bigelovii
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Catalina Crossosoma
Crossosoma californicum
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California Croton
Croton californicus
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Turkey Mullein
Croton setiger
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Wiggins' Croton
Croton wigginsii
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Side-grooved Cryptantha
Cryptantha affinis
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Wilkes' Cryptantha
Cryptantha ambigua
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Bearded Cryptantha
Cryptantha barbigera
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Bearded Cryptantha
Cryptantha barbigera var. barbigera
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Palm Springs Cryptantha
Cryptantha barbigera var. fergusoniae
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Common Name James' Catseye
Cryptantha cinerea
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Cleveland's Cryptantha
Cryptantha clevelandii
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Cleveland's Cryptantha
Cryptantha clevelandii var. clevelandii
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Coastal Cryptantha
Cryptantha clevelandii var. florosa
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Clokey's Cryptantha
Cryptantha clokeyi
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Coast Range Cryptantha
Cryptantha corollata