| P Ampelozizyphus amazonicus |
| P Amphicarpaea bracteata (Hog Peanut) |
| P Amphicarpaea edgworthii |
| P Amsonia grandiflora |
| P Anabasis aphylla (Anabasis) |
| P Anacardium occidentale (Cashew) |
| P Anadenanthera colubrina (Cohoba; Niopo) |
| P Anadenanthera peregrina (Cohoba; Niopo) |
| P Anamirta cocculus (Levant Berry) |
| P Ananas comosus (Pineapple) |
| P Anaphalis margaritacea (Pearly Everlasting) |
| P Anastatica hierochuntica (Jericho Rose) |
| P Andira araroba (Araroba) |
| P Andira inermis (Cabbage Bark) |
| P Andrographis paniculata (Creat) |
| P Anemarrhena asphodeloides (Chih-Mu; Zhi-Mu) |
| P Anemone narcissiflora |
| P Anemone pulsatilla (Pasque Flower) |
| P Anethum graveolens (Dill; Garden Dill) |
| P Angelica archangelica (Garden Angelica; Angelica; Wild Parsnip) |