Cirsium vulgare - Bull Thistle

Claytonia caroliniana - Carolina Spring Beauty

Claytonia virginica - Virginia Spring Beauty

Clintonia borealis - Bluebead Lily (Yellow Clintonia)

Conopholis americana - Squawroot

Cornus canadensis - Bunchberry

Coronilla varia - Crown Vetch

Cypripedium acaule - Pink Lady's Slipper

Cypripedium calceolus - Large Yellow Lady's Slipper