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•Papaver spp.
•Parodia spp.
•Passiflora spp.
•Paullinia spp.
•Pausinystalia spp.
•Pedilanthus spp.
•Peganum spp.
•Pereskiopsis spp.
•Petalostylis spp.
•Peumus spp.
•Phalaris spp.
•Phragmites spp.
•Phyllanthus spp.
•Physalis spp.
•Pilocarpus spp.
•Pilocereus spp.
•Piper spp.
•Plinia spp.
•Polygonum spp.
•Pouterina spp.
•Psychotria spp.
•Ptychopetalum spp.
•Pueraria spp.
•Punica spp.
•Quassia spp.
•Ranunculus spp.
•Rauvolfia spp.
•Rebutia spp.
•Rhipsalis spp.
•Ricinus spp.
•Rivea (Turbina) spp.
•Rollinia spp.
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