A
B
C
- Calendula (Calendula officinalis)
- Camomile (Matricaria chamomilla)
- Camphor (Cinnamomum camphora)
- Caraway (Carum carvi)
- Cayenne pepper (Capsicum frutescens)
- Celandine (Chelidonium majus)
- Chicory (Cichorium intybus)
- Cinnamon (Cinnamomum verum / cassia)
- Clove, spice (Syzygium aromaticum)
- Coffee (Coffea arabica)
- Coltsfoot (Tussilago farfara)
- Comfrey (Symphytum officinale)
- Coriander (Coriandrum sativum)
- Couch grass (Elymus repens)
- Cranberry (Vaccinium macrocarpon Aiton)
- Cranberry (Vaccinium vitis-idaea)
- Currant, black (Ribes nigrum)
) in the following list.