Care - Cax
| Carlina acaulis | Silberdistel | Stemless Carline Thistle | Asteracea |
| Carlina acanthicifolia | Golddistel Acanthusblättrige | Acanthus- leaved Carline Thistle | Asteracea |
| Carlina barnebiana | Eberraute Barnaby | Barnaby Carline Thistle | Asteracea |
| Carlina biebersteinii | Eberwurz Biebersteins | Bieberstein's Carline Thistle | Asteracea |
| Carlina corymbosa | Eberwurz Doldige | Clustered Carline Thistle | Asteracea |
| Carlina curetum | Eberwurz Kretische | Cretan Carline Thistle | Asteracea |
| Carlina diae | Eberwurz Dia | Dia Carline Thistle | Asteracea |
| Carlina fiumensis | Eberwurz Rijeka | Rijeka Carline Thistle | Asteracea |
| Carlina frigida | Eberwurz Eis | Ice Carline Thistle | Asteracea |
| Carlina graeca | Eberwurz Griechische | Greek Carline Thistle | Asteracea |
| Carlina gummifera | Eberwurz Gummi | Pine Thistle | Asteracea |
| Carlina lanata | Eberwurz Wollige | Wooly Carline Thistle | Asteracea |
| Carlina macrocephala | Eberwurz Großköpfige | Big Head Carline Thistle | Asteracea |
| Carlina nebrodensis | Eberwurz Nebroden | Monti Nebrodi Carline Thistle | Asteracea |
| Carlina racemosa | Eberwurz Trauben | Racemose Carline Thistle | Asteracea |
| Carlina sicula | Eberwurz Sizilianische | Sicilian Carline Thistle | Asteracea |
| Carlina sitiensis | Eberwurz Sitia | Sitia Carline Thistle | Asteracea |
| Carlina tragacanthifolia | Eberwurz Küsten | Tragacanth- leaved Carline Thistle | Asteracea |
| Carlina vulgaris | Eberwurz Gewöhnliche | Common Carline Thistle | Asteracea |
| Carpesium cernuum | Kragenblume Nickende | Nodding Carpesium | Asteracea |
| Caroxylon aegaeum | Salzkraut Ägäisches | Aegean Saltwort | Chenopodiaceae |
| Caroxylon carpathum | Salzkraut Karpathos | Karpathos Saltwort | Chenopodiaceae |
| Caroxylon genistoides | Salzkraut Ginsterähnliches | Broom- like Saltwort | Chenopodiaceae |
| Caroxylon vermiculatum | Salzkraut Wurmähnliches | Mediterranean Saltwort | Chenopodiaceae |
| Carpinus betulus | Hainbuche Gewöhnliche | European Hornbeam | Betulaceae |
| Carpobrotus chilensis | Hottentottenfeige Chilenische | Chilean Hottentot Fig | Aizoacaea |
| Carpobrotus acinaciformis | Hottentottenfeige Rote | Red Hottentot Fig | Aizoacaea |
| Carpobrotus edulis | Hottentottenfeige Gelbe | Yellow Hottentot Fig | Aizoacaea |
| Carthamus arborescens | Färberdistel Baum | Yellow Woody Distaff Thistle | Asteraceae |
| Carthamus boissieri | Färberdistel Boissiers | Boissier's Distaff Thistle | Asteraceae |
| Carthamus dentatus | Färberdistel Gezähnte | Toothed Distaff Thistle | Asteraceae |
| Carthamus glaucus | Färberdistel Blaugrüne | Glaucous Distaff Thistle | Asteraceae |
| Carthamus lanatus | Färberdistel Wollige | Wooly Distaff Thistle | Asteraceae |
| Carthamus leucocaulos | Färberdistel Weißstämmige | White- stemmed Distaff Thistle | Asteraceae |
| Carthamus rechingeri | Färberdistel Rechingers | Rechinger's Distaff Thistle | Asteraceae |
| Carthamus tenuis | Färberdistel Zierliche | Slender Distaff Thistle | Asteraceae |
| Carthamus tinctorius | Färberdistel Echte | Safflower | Asteraceae |
| Caryoptris x cladonensis | Bartblume Hybrid | Hybrid Bluebeard | Lamiaceae |
| Castanea crenata | Kastanie Japanische | Japanese Chestnut | Fagaceae |
| Castanea sativa | Kastanie Edel | Sweet Chestnut | Fagaceae |
| Castroviejoa frigida | Strohblume Korsische | Corsican Strawflower | Asteraceae |
| Castroviejoa montelinasana | Strohblume Sardische | Monte Linas Strawflower | Asteraceae |
| Catalpa bignonioides | Trompetenbaum Gewöhnlicher | Southern Catalpa | Bignoniaceae |
| Catalpa x erubenscens | Trompetenbaum Purpurblättriger | Indian Catalpa | Bignoniaceae |
| Catalpa ovata | Trompetenbaum Gelber | Yellow Catalpa | Bignoniaceae |
| Catananche caerulea | Rasselblume Blaue | Blue Cupidone | Asteraceae |
| Catananche lutea | Rasselblume Gelbe | Yellow Cupidone | Asteraceae |
| Caucalis platycarpos | Haftdolde Acker | Small Bur Parsley | Apiaceae |