Vascular Plants
Includes all flowering plants, conifers, ferns and fern-allies.
Genus names beginning with P:
104 genera
413 species
143 subspecies and varieties
413 species
143 subspecies and varieties
Show only taxa with photos
Packera – butterweed (12 species)
Packera – groundsel (12 species)
Paeonia – peony (1 species)
Panicum – panic grass (6 species)
Panicum – witchgrass (6 species)
Papaver – poppy (4 species)
Parameconopsis (1 species)
Parapholis – sickle-grass (1 species)
Parietaria – pellitory (2 species)
Parnassia – grass-of-parnassus (5 species)
Parthenocissus – Virginia creeper (1 species)
Parthenocissus – woodbine (1 species)
Pascopyrum – wheatgrass (1 species)
Paspalum (1 species)
Pastinaca – parsnip (1 species)
Paulownia – princess tree (1 species)
Paxistima (1 species)
Pectiantia – mitrewort (1 species)
Pectocarya – combseed (2 species)
Pectocarya – pectocarya (2 species)
Pedicularis – lousewort (7 species)
Pedicularis – pedicularis (7 species)
Pediocactus – ball cactus (1 species)
Peganum – harmal (1 species)
Pellaea – cliff-brake (4 species)
Peltandra – arrow arum (1 species)
Penstemon – beardtongue (30 species)
Penstemon – penstemon (30 species)
Pentaglottis – alkanet (1 species)
Pentagramma – gold-back fern (1 species)
Penthorum – ditch stonecrop (1 species)
Perideridia – false-caraway (2 species)
Perideridia – yampah (2 species)
Perilla (1 species)
Persicaria – knotweed (7 species)
Persicaria – smartweed (7 species)
Persicaria – tearthumb (7 species)
Petasites – butterbur (2 species)
Petasites – coltsfoot (2 species)
Petrophytum – rockmat (3 species)
Petroselinum – parsley (1 species)
Phacelia – phacelia (14 species)
Phalaris – canarygrass (2 species)
Phegopteris – beechfern (1 species)
Phemeranthus – fameflower (2 species)
Philadelphus – mockorange (1 species)
Philadelphus – syringa (1 species)
Phleum – Timothy (2 species)
Phlox – phlox (10 species)
Phlox – wild sweet-william (10 species)
Phoenicaulis – daggerpod (1 species)
Photinia – redtip (1 species)
Phragmites – reed (1 species)
Phyllodoce – mountain-heath (3 species)
Phyllospadix – surf-grass (3 species)
Physalis – ground-cherry (2 species)
Physaria – bladderpod (6 species)
Physaria – double bladderpod (6 species)
Physaria – twinpod (6 species)
Physocarpus – ninebark (2 species)
Physostegia – physostegia (1 species)
Phyteuma (1 species)
Phytolacca – pokeberry (1 species)
Picea – spruce (3 species)
Picris – oxtongue (1 species)
Picris – picris (1 species)
Pilularia – pillwort (1 species)
Pimpinella – pimpinella (0 species)
Pinguicula – butterwort (1 species)
Pinus – pine (4 species)
Piptatheropsis – piptatherum (1 species)
Pisum (1 species)
Pityopus – pine-foot (1 species)
Pityopus – pityopus (1 species)
Plagiobothrys – plagiobothrys (8 species)
Plagiobothrys – popcorn-flower (8 species)
Plantago – plantain (9 species)
Platanthera – bog-orchid (13 species)
Platanthera – piperia (13 species)
Platanthera – rein-orchid (13 species)
Platanus (2 species)
Plectritis – plectritis (4 species)
Pleiacanthus – skeletonweed (1 species)
Pleuricospora – fringed-pinesap (1 species)
Pleuricospora – Sierra-sap (1 species)
Pleuropogon – pleuropogon (1 species)
Pleuropogon – semaphoregrass (1 species)
Poa – bluegrass (32 species)
Podagrostis – bent (3 species)
Podagrostis – bentgrass (3 species)
Polanisia – clammyweed (0 species)
Polemonium – Jacob's-ladder (8 species)
Polemonium – polemonium (8 species)
Polemonium – sky-pilot (8 species)
Polycarpon – manyseed (1 species)
Polyctenium – combleaf (1 species)
Polygala – milkwort (1 species)
Polygonum – doorweed (16 species)
Polygonum – knotweed (16 species)
Polygonum – smartweed (16 species)
Polypodium – polypody (4 species)
Polypogon – beard-grass (4 species)
Polypogon – polypogon (4 species)
Polystichum – holly-fern (14 species)
Polystichum – sword-fern (14 species)
Pontederia (1 species)
Populus – aspen (6 species)
Populus – cottonwood (6 species)
Populus – poplar (6 species)
Portulaca (1 species)
Potamogeton – pondweed (19 species)
Potentilla – cinquefoil (22 species)
Potentilla – five-finger (22 species)
Poteridium – American burnet (1 species)
Poteridium – western burnet (1 species)
Poterium – fodder burnet (1 species)
Poterium – garden burnet (1 species)
Poterium – salad burnet (1 species)
Poterium – small burnet (1 species)
Primula – primrose (8 species)
Prosartes – fairy-bell (3 species)
Prunella – all-heal (1 species)
Prunella – self-heal (1 species)
Prunus – cherry (18 species)
Prunus – laurel (18 species)
Prunus – plum (18 species)
Psathyrostachys (1 species)
Pseudelymus (1 species)
Pseudognaphalium – cudweed (5 species)
Pseudoroegneria – wheatgrass (1 species)
Pseudotsuga – Douglas fir (1 species)
Pseudotsuga – Oregon pine (1 species)
Psilocarphus – woolly-heads (4 species)
Psilocarphus – woolly-marbles (4 species)
Pteridium – bracken (1 species)
Pteridium – brake-fern (1 species)
Pterospora – Albany-beechdrops (1 species)
Pterospora – pinedrops (1 species)
Puccinellia – alkaligrass (5 species)
Pueraria (1 species)
Pulmonaria (0 species)
Purshia – antelope-brush (1 species)
Purshia – bitter-brush (1 species)
Pyracantha – firethorn (2 species)
Pyrola – pyrola (7 species)
Pyrola – shinleaf (7 species)
Pyrola – wintergreen (7 species)
Pyrrocoma – goldenweed (4 species)
Pyrus – pear (1 species)
