| Monarda bradburiana | | Lemon Bergamot? |
| Oenothera fruticosa | | Sundrops |
| Oenothera speciosa (white) | | Showy Primrose |
| Oxalis violacea | | Violet Wood Sorrel |
| Pachysandra procumbens | | Allegheny Spurge |
| Panax quinquefolium | | Ginseng |
| Penstemon australis | | Beardtongue (lavender) |
| Penstemon smallii | | Beardtongue (purple/white) |
| Phacelia bipinnatifida | | Phacelia (annual) |
| Phacelia purshii | | Pursh's Phacelia |
| Phlox amoena | | Hairy Phlox |
| Phlox carolina | | Carolina Phlox |
| Phlox divaricata (blue) | | Wild Sweet William (blue) |
| Phlox pilosa v. ozarkana | | Ozark Phlox |
| Physostegia virginiana | | Obedient Plant |
| Polemonium reptans | | Jacob's Ladder |
| Polygonatum biflorum | | Solomon's Seal |
| Polygonatum commutatum | | Great Solomon's Seal |