| | Where you can find a given plant |
| | Key |
| | Path A: Old Sarum -top | Path E: Keeper's Cottage - Camp Hill | Road P: To bottom of Camp Hill |
| | Path B: Old Sarum - Outer Rings | Path F: Avon Farm - Salisbury | Road Q: To Little Durnford |
| | Path C: Paths S & W of Old Sarum | Path G: Mill lane - Devizes Road | Road R: Through village to Hathaway Close |
| | Path D: Old Sarum - Keeper's Cottage | Place X: Water Meadow | Road S: Up Phillips Lane to Park & Ride |
| | |
| | Flowering Period |
| | English Name | Path(s) | Start | End | Genus | Species | Family |
| | Cleavers, Common | ABCDEFG | May | Sep | Galium | aparine | Bedstraw |
| | Clover, Red | C | May | Nov | Trifolium | pratense | Pea |
| | Clover, white | C | May | Nov | Trifolium | repense | Pea |
| | Comfrey, Common | FG | May | Jun | Symphytum | officinale | Borage |
| | Cornsalad | R | Apr | Aug | Valerianella | locusta | Valerian |
| | Corydalis, Yellow | R | May | Nov | Corydalis | lutea | Fumitory |
| | Cowslip | Apr | May | Primula | veris | Primrose |
| | Cranesbill, Cut leaved | CR | May | Sep | Geranium | dissectum | Geranium |
| | Cranesbill, Dovesfoot | C | Apr | Sep | Geranium | molle | Geranium |
| | Cranesbill, Hedgerow | CR | May | Sep | Geranium | pyrenaicum | Geranium |
| | Cress, Hoary | May | Jun | Carderia | draba | Crucifer |
| | Cress, Thale | R | Mar | Oct | Arabidopsis | thaliana | Crucifer |
| | Crowfoot,Chalk-stream Wat | X | Apr | Sep | Ranunculus | penicillatus | Buttercup |
| | Cuckoo Flower | X | Apr | Jun | Cardamine | pratensis | Crucifer |
| | Daisy | C | Jan | Dec | Bellis | perennis | Daisy |