| | | | Panicum virgatum Strictum (panic effil?) | |
| | | | Parnassia palustris (parnassie des marais) | |
| |  | | Peltandra virginica (peltandre) | |
| | | | Peltiphyllum peltatum (Darmera) (plante de parapluie) | |
| | | | PennisetumAlopecuroides (?) | |
| | |  | Petasites hybridus (p?tasite officinal - chapeau du diable) | |
| | | | Phalaris arundinacea Picta (roseau panach?) | |
| | | | Phragmites australis (roseau commun) | |
| | | | Phragmites australis "karka cv" (?) | |
| | | | Phragmites australis "stolonifera" (?) | |
| | | | Phragmites australis "Variegata" (roseau ? balais panach?) | |
| | | | Pistia stratiotes (laitue aquatique) | |
| | | | Polygonium affine (renou?e) | |
| | | | Polygonum amphibium (renou?e amphibie) | |
| | | | Polygonum bistorta (renou?e histori?) | |
| | | | Pontederia cordata (pont?d?rie ? feuilles en coeur) | |
| | | | Pontederia cordata "Alba" (pont?d?rie blanche) | |
| | | | Pontederia lanceolata (pont?d?rie ? feuilles lanc?ol?es) | |
| | | | Potamogeton crispus (potamot cr?pu) | |
| | | | Potamogeton lucens (potamot luisant) | |
| | | | Potamogeton natans (potamot nageant - langue de chien) | |
| | | | Potamogeton perfoliatus (Potamot perfoli?) | |
| | | | Preslia cervina (menthe anglaise bleue) | |
| | | | Preslia cervina "Alba" (menthe anglaise blanche) | |
| | | | Primula Florindae (Primev?re) | |
