| P Aleurites fordii (Tungoil Tree) |
| P Aleurites moluccana (Candlenut; Candleberry; Candlenut Tree; Indian Walnut; Lumbangtree; Varnishtree) |
| P Aleurites montana |
| P Alisma plantago-aquatica (Mud Plantain; Tse-Hsieh; Water Plantain; Ze-Xie) |
| P Alliaria petiolata (Garlic Mustard) |
| P Allium ampeloprasum (Elephant Garlic; Kurrat) |
| P Allium cepa (Onion; Shallot) |
| P Allium sativum var. sativum (Garlic) |
| P Allium schoenoprasum (Chives) |
| P Alnus crispa |
| P Alnus glutinosa (Black Alder) |
| P Alnus maximowiczii |
| P Alnus nepalensis |
| P Alnus rubra |
| P Alnus rugosa |
| P Alocasia macrorrhiza (Giant Taro) |
| P Aloe vera (Bitter Aloes; Aloe) |
| P Aloysia citrodora (Lemon Verbena) |
| P Alphitonia excelsa |
| P Alphitonia macrocarpa |