Pacific Silverweed
Painted Trillium
Pale Beardtongue
Pale Dock
Pale False Mannagrass
Pale Sedge
Pale St. Johnswort
Pale Touch-me-not
Palegreen Orchid
Paleleaf Woodland Sunflower
Palespike Lobelia
Paleyellow Iris
Panicgrass
Panicled Bulrush
Panicled Hydrangea
Panicledleaf Ticktrefoil
Paper Birch
Parachute Sedge
Paradise Apple
Paradise Plant
Parasol Sedge
Parasol Whitetop
Parsnip
Partridgeberry
Pasture Thistle
Patience Dock
Pea
Pear
Pearl Millet
Pearlwort
Pearly Everlasting
Peaty Dewberry
Pellitory
Pennsylvania Bittercress
Pennsylvania Blackberry
Pennsylvania Buttercup
Pennsylvania Catchfly
Pennsylvania Cinquefoil
Pennsylvania Clubmoss
Pennsylvania Pellitory
Pennsylvania Sedge
Pennsylvania Smartweed
Pennycress
Penthorum