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Genus Brickelia
- genus of herbs of southwestern America having usually creamy florets followed by one-seeded fruits in a prominent bristly sheath
Genus Cacalia
- genus of tall smooth herbs of forested mountains of Europe and Asia minor; in some classifications includes many plants usually placed in genus Emilia
Genus Callistephus
- one species: erect Asiatic herb with large flowers
Genus Carduus
- genus of annual or perennial Old World prickly thistles
Genus Carlina
- genus of Mediterranean thistles
Genus Catananche
- genus of Mediterranean herbs: cupid's dart