| NAME OF PLANT | WHERE FOUND | DATE | WHERE FOUND | DATE |
| Solidago gigantea | ||||
| early goldenrod | ||||
| Solidago virgaurea | ||||
| goldenrod | ||||
| Sonchus arvensis | ||||
| perennial sow-thistle | ||||
| Sonchus asper | ||||
| prickly sow-thistle | ||||
| Sonchus oleraceus | ||||
| smooth sow-thistle | ||||
| Sorbus aria | ||||
| whitebeam | ||||
| Sorbus acuparia | ||||
| rowan | ||||
| Sorbus torminalis | ||||
| wild service-tree | ||||
| Sparganium angustifolium | ||||
| floating bur-reed | ||||
| Sparganium emersum | ||||
| unbranched bur-reed | ||||
| Sparganium erectum | ||||
| branched bur-reed | ||||
| Spartina anglica | ||||
| common cord-grass | ||||
| Spartium junceum | ||||
| Spanish broom | ||||
| Spergula arvensis | ||||
| corn spurrey | ||||
| Spergularia marina | ||||
| lesser sea-spurrey | ||||
| Spergularia media | ||||
| greater sea-spurrey | ||||
| Spergularia rubra | ||||
| sand spurrey | ||||
| Spergularia rupicola | ||||
| rock sea-spurrey | ||||
| Spiranthes spiralis | ||||
| autumn lady's-tresses | ||||
| Spirodela polyrhiza | ||||
| greater duckweed | ||||
| 87 | ||||