| NAME OF PLANT | WHERE FOUND | DATE | WHERE FOUND | DATE |
| Arctium minus | ||||
| lesser burdock | ||||
| Arctium nemorosum | ||||
| wood burdock | ||||
| Arctostaphylos uva-ursi | ||||
| bearberry | ||||
| Arenaria serpyllifolia | ||||
| thyme-leaved sandwort | ||||
| Armeria maritima | ||||
| thrift | ||||
| Armoracia rusticana | ||||
| horse-radish | ||||
| Arrhenatherum elatius | ||||
| false oat-grass | ||||
| Artemisia absinthium | ||||
| wormwood | ||||
| Artemisia verlotiorum | ||||
| Chinese mugwort | ||||
| Artemisia vulgaris | ||||
| mugwort | ||||
| Arum maculatum | ||||
| lords-and-ladies | ||||
| Asparagus officinalis | ||||
| asparagus | ||||
| Asperula cynanchica | ||||
| squinancywort | ||||
| Asplenium adiantum-nigrum | ||||
| black spleenwort | ||||
| Asplenium marinum | ||||
| sea spleenwort | ||||
| Asplenium ruta-muraria | ||||
| wall-rue | ||||
| Aspenium trichomanes | ||||
| maidenhair spleenwort | ||||
| Asplenium viride | ||||
| green spleenwort | ||||
| Aster tripolium | ||||
| sea aster | ||||
| Aster x salignus | ||||
| common Michaelmas-daisy | ||||
| 7 | ||||