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Cirsium drummondii

Cirsium grahamii

Cirsium douglasii

Douglas' thistle

Cuscuta harperi

Cuscuta pentagona var. pentagona

Cuscuta plattensis

Cuscuta suksdorfii var. suksdorfii

Cuscuta denticulata var. veatchii

Cuscuta obtusiflora

Misopates orontium

Corn snapdragon

Cusickiella quadricostata

Bodie hills cusickiella

Cyathea parvula

Sphaeropteris cooperi

Cooper's cyathea

Cyathea pungens

Cyathea armata

Cuscuta potosina

Cyclachaena xanthifolia

Cyclanthera naudiniana

Cycloloma atriplicifolium

Cyclopeltis kingii