| NAME OF PLANT | WHERE FOUND | DATE | WHERE FOUND | DATE |
| Centaurea scabiosa | ||||
| greater knapweed | ||||
| Centaurium erythraea | ||||
| common centaury | ||||
| Centranthus ruber | ||||
| red valerian | ||||
| Cephalanthera damasonium | ||||
| white helleborine | ||||
| Cerastium arvense | ||||
| field mouse-ear | ||||
| Cerastium diffusum | ||||
| dark-green mouse-ear (sea mouse-ear) | ||||
| Cerastium fontanum | ||||
| common mouse-ear | ||||
| Cerastium glomeratum | ||||
| sticky mouse-ear | ||||
| Cerastium semidecandrum | ||||
| little mouse-ear | ||||
| Cerastium tomentosum | ||||
| snow-in-summer | ||||
| Ceratocapnos claviculata | ||||
| climbing corydalis | ||||
| Ceratophyllum demersum | ||||
| rigid hornwort | ||||
| Ceterach officinarum | ||||
| rustyback | ||||
| Chaenorhinum minus | ||||
| small toadflax | ||||
| Chaerophyllum temulum | ||||
| rough chervil | ||||
| Chamaemelum nobile | ||||
| chamomile | ||||
| Chamerion angustifolium | ||||
| rosebay willowherb | ||||
| Chelidonium majus | ||||
| greater celandine | ||||
| Chenopodium album | ||||
| fat hen | ||||
| Chenopodium bonus-henricus | ||||
| good king-Henry | ||||
| 19 | ||||