Common houseleek 
Common Raspwort 
Concertina Plant 
Coppertone Stonecrop 
Coral Crassula 
Crassula alata 
Crassula capitella 
Crassula closiana 
Crassula corymbulosa 
Crassula elegans 
Crassula intermedia 
Creeping Foamflower 
Creeping Raspwort 
Crevice alumroot 
Crimean Peony 
Cynomorium 
Ditch Stonecrop 
Early saxifrage 
Echeveria derenbergii 
Echeveria pilosa 
Echeveria pulidonis 
Echeveria purpusorum 
Echeveria setosa 
Eurasian Watermilfoil