Canary Bird is a synonym of Austria.
Canna Lily is a synonym of Canna.
Cannova Red is a synonym of Cannova Red Shades.
Caribbean is a synonym of indica var. indica.
Carman is a synonym of Eureka.
Carmen is a synonym of Eureka.
carnea Roscoe is a synonym of indica var. indica.
Caroni is a synonym of glauca f. Caroni.
Cattleya is a synonym of Allemania.