| Agapanthus africanus | African Lily, Lily of the nile | Amaryllidaceae | A. umbellatus. pro parte | 0 | 1 |
| Agapanthus campanulatus | | Amaryllidaceae | A. umbellatus. pro parte | 0 | 1 |
| Agapanthus praecox minimus | | Amaryllidaceae | A. umbellatus. pro parte | 1 | 1 |
| Allium acuminatum | Hooker's Onion, Tapertip onion | Amaryllidaceae | | 3 | 2 |
| Allium aflatunense | Persian Onion, Ornamental Onion | Amaryllidaceae | | 2 | 2 |
| Allium akaka | | Amaryllidaceae | A. latifolium. | 3 | 2 |
| Allium altaicum | | Amaryllidaceae | | 3 | 2 |
| Allium ampeloprasum | Wild Leek, Broadleaf wild leek | Amaryllidaceae | | 5 | 3 |
| Allium ampeloprasum babingtonii | Babington's Leek | Amaryllidaceae | A. babingtonii. | 3 | 3 |
| Allium angulare | | Amaryllidaceae | | 3 | 2 |
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