Campanula
'Ringsabell Indigo Blue'
Caryopteris incana
"Blue Myth"
Caryopteris incana
"Bluebeard"
Ceanothus
'Centennial'
"California Lilac"
Ceanothus
'Midnight Magic'
Ceratotheca triloba
"African Foxglove"
Cerinthe retorta