| St. Johns Wort | HYPERICUM PERFORATUM |
| Scarlet Pimpernel | ANAGALLIS ARVENSIS |
| Scentless Mayweed | MATRICARIA PERFORATA |
| Shepherds Purse | CAPSELLA BURSA-PASTORIS |
| Silverweed | POTENTILLA ANSERINA |
| Small-flowered Geranium | GERANIUM PUSILLUM |
| Snowdrop | GALANTHUS NIVALIS |
| Speedwell, Common Field | VERONICA PERSICA |
| Speedwell, Pink Water | VERONICA CATENTATA |
| Spindle | EUONYMUS EUROPAEUS |
| Stinging Nettle | URTICA DIOICA |
| Stinking or Roast-beef Iris | IRIS FOETIDISSIMA |
| Stonecrop | SEDUM ALBUM White |
| Sweet briar | ROSA RUBIGINOSA |
| Sweet Woodruff | GALIUM ODORATUM |
| Tansy | TANACETUM VULGARE |
| Teasel | DIPSACUS FULLONUM |
| Travellers Joy or Native Clematis | VITALBA |
| Tufted Vetch | VICIA CRACCA |