| P Avicennia tomentosa |
| P Azadirachta indica (Neem) |
| P Bactris gasipaes (Peach palm; Pejibaye) |
| P Balanites aegyptiacus (Desert Date; Soapberry Tree; dattier du desert (Fr.); dattier sauvage (Fr.); heglik (Fr.); Zachunbaum (Ger.); betu (Indi) |
| P Balanops australiana |
| P Ballota nigra (Black Horehound) |
| P Banisteriopsis caapi (Ayahuasca; Caapi; Yage; Soul Vine; Spirit Vine) |
| P Baptisia hirsuta |
| P Baptisia sp |
| P Baptisia sphaerocarpa |
| P Baptisia tinctoria (Wild Indigo) |
| P Barosma betulina (Buchu) |
| P Basella alba (Vinespinach) |
| P Bauhinia vahlii |
| P Belamcanda chinensis (Leopard Lily; Blackberry Lily; Shenan; Iris Tigre (Fr.); Leopardenblume (Ger.); Maravilla (Sp.); Mariposa (Sp.)) |
| P Benincasa hispida (Waxgourd) |
| P Berberis vulgaris (Barberry) |
| P Bertholletia excelsa (Brazilnut; Brazilnut-Tree; Creamnut; Paranut) |
| P Beta vulgaris (Beet; Beetroot; Sugar Beet; Garden Beet) |
| P Betula alba |