Oxydendrum arboreum (Sourwood)
Pachysandra procumbens (Allegheny Spurges)
Packera aurea (Golden Groundsel)
Packera obovata (Roundleaf Groundsel)
Panicum virgatum 'Dream Catcher Tumbleweed' (Tumbleweed Switchgrass)
Panicum virgatum (Switchgrass)
Parthenium integrifolium (Wild Quinine)
Passiflora incarnata (Passion Flower)
Penstemon calycosus (Calyco Beardtongue)
Penstemon digitalis (White Beardtongue)
Penstemon hirsutus (Hairy Beardtongue)
Penstemon laevigatus (Eastern Smooth Beardtongue)
Penstemon smallii (Small's Beardtongue)
Phlox divaricata 'Blue Moon' (Wild Blue Phlox)
Phlox divaricata (Wild Blue Phlox)
Phlox subulata 'Purple Beauty' (Moss phlox)
Phyla nodiflora (Frogfruit)
Physocarpus opulifolius (Ninebark)
Pityopsis graminifolia (Narrow-leaf Silkgrass)
Podophyllum peltatum (Mayapple)
Polemonium reptans (Jacob's Ladder)
Polygonatum biflorum (Solomon's Seal)
Polystichum acrostichoides (Christmas Fern)
Primula meadia (Eastern Shooting Star)
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Asclepias humistrata (Sand-hill Milkweed)
Asclepias incarnata (Swamp Milkweed)
Asclepias perennis (Aquatic Milkweed)
Asclepias purpurascens (Purple Milkweed)
