| Plant tribes (Pi - Pn) | 
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| bitterbush |  | Rutales > Picramniaceae > Picramnioideae |  | 
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| bitter ash, bitterwood, nigaki, picrasma, quassia |  | Rutanae > Rutales > Simaroubaceae |  | 
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| bitterweed, oxtongue |  | Asteranae > Asterales > Asteraceae |  | 
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| aceitillo, jaborandi, pilocarpus |  | Rutanae > Rutales > Rutaceae |  | 
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|  |  | Thymelaeales > Thymelaeineae > Thymelaeaceae |  | 
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| burnet saxifrage |  | Araliales > Apiaceae > Pimpinelloideae |  | 
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| pine, pinyon |  | Pinineae > Pinaceae > Pinoideae |  | 
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| butterwort |  | Lamianae > Lamiales > Lentibulariaceae |  | 
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| cubeb, higuillo, kava kava, pepper, spanish elder |  | Piperales > Piperaceae > Piperoideae |  | 
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|  |  | Fabanae > Fabales > Mimosaceae |  | 
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| catchbirdtree, corcho bobo, devil's-claws, water mampoo |  | Caryophyllales > Nyctaginaceae > Pisonioideae |  | 
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| Cyprus turpentine, mastic tree, pistache, pistachio |  | Anacardiineae > Anacardiaceae > Pistacioideae |  | 
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| pistia, water lettuce |  | Arales > Araceae > Pistioideae |  | 
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| pina cortadora, pitcairnia |  | Bromeliales > Bromeliineae > Bromeliaceae |  | 
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| Japanese pittosporum, Victorian box, cheesewood, mock orange |  | Pittosporales > Pittosporaceae > Pittosporoideae |  | 
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| planertree |  | Urticanae > Urticales > Ulmaceae |  | 
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| ale, buckhorn, desert Indianwheat, flea seed, goose tongue, plantain, psyllium |  | Lamiales > Plantaginaceae > Plantaginoideae |  | 
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| London plane, buttonwood, planetree, sycamore |  | Hamamelidales > Platanaceae > Platanoideae |  | 
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|  |  | Lamianae > Lamiales > Bignoniaceae |  | 
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|  |  | Bromeliales > Bromeliineae > Bromeliaceae |  | 
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| creamcups |  | Papaverales > Papaveraceae > Platystemonoideae |  | 
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|  |  | Gentiananae > Apocynales > Apocynaceae |  | 
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|  |  | Araliales > Araliaceae > Plerandroideae |  | 
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|  |  | Myrtanae > Myrtales > Melastomataceae |  | 
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| pinesap |  | Ericales > Ericineae > Ericaceae |  | 
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|  |  | Polypodiidae > Parkeriales > Vittariaceae |  | 
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| bonnet orchid |  | Orchidales > Orchidineae > Orchidaceae |  | 
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| Cape plumbago, doctorbush, leadwort, whorled plantain |  | Plumbaginales > Plumbaginaceae > Plumbaginoideae |  | 
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| Singapore graveyard flower, frangipani, nosegaytree, plumeria, red jasmine, templetree |  | Apocynales > Apocynaceae > Plumerioideae |  | 
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|  |  | Gentianales > Gentianineae > Gentianaceae |  |