Combination search
Looking for commercially available native plant species suitable to your state or region, try the Recommended Species page.
| scientific name | common name(s) | image gallery |
| Oenothera grandiflora | Largeflower Evening Primrose Florida Tree-primrose | |
| Oenothera heterophylla | Variable-leaf Evening-primrose | |
| Oenothera heterophylla ssp. orientalis | Oriental Evening Primrose Oriental Evening-primrose | |
| Oenothera humifusa | Seabeach Evening Primrose | |
| Oenothera laciniata | Cutleaf Evening-primrose Cut-leaved Evening Primrose | |
| Oenothera linifolia | Threadleaf Evening-primrose | |
| Oenothera nutans | Nodding Evening Primrose Nodding Evening-primrose | |
| Oenothera pilosella | Meadow Evening-primrose | |
| Oenothera pilosella ssp. pilosella | Meadow Evening Primrose Meadow Evening-primrose Prairie Sundrops | |
| Oenothera simulans | Southern Beeblossom Southern Gaura Morning Honeysuckle Morning Gaura | |
| Oenothera sinuosa | Wavyleaf Beeblossom Wavyleaf Gaura | |
| Oenothera spachiana | Spach's Evening-primrose | |
| Oenothera speciosa | Pink Evening Primrose Showy Evening Primrose Mexican Evening Primrose Showy Primrose Pink Ladies Buttercups Pink Buttercups | |
| Oenothera triloba | Stemless Evening-primrose Stemless Evening Primrose | |
| Oenothera villosa | Hairy Evening Primrose | |
| Oenothera villosa ssp. villosa | Hairy Evening-primrose | |
| Oldenlandia boscii | Bosc's Mille Graines | |
| Oldenlandia corymbosa | Flat-top Mille Graines | |
| Oligoneuron rigidum | Stiff Goldenrod Hard-leaf Goldenrod | |
| Oligoneuron rigidum var. glabratum | Stiff Goldenrod | |
| Oldenlandia uniflora | Clustered Mille Graines | |
| Onosmodium bejariense | Soft-hair Marbleseed | |
| Onosmodium bejariense var. bejariense | Soft-hair Marbleseed False Gromwell | |
| Onosmodium bejariense var. hispidissimum | Softhair Marbleseed | |
| Onosmodium decipiens | Deceptive Marbleseed | |
| Onoclea sensibilis | Sensitive Fern Bead Fern Sympathy Fern | |
| Onosmodium virginianum | Wild Job's-tears Virginia False Gromwell Eastern False Gromwell Virginia Marbleseed | |
| Ophioglossum crotalophoroides | Bulbous Adder's-tongue | |
| Ophioglossum crotalophoroides var. crotalophoroides | Bulbous Adder's-tongue | |
| Ophioglossum crotalophoroides var. nanum | Bulbous Adder's-tongue Bulbous Adderstongue | |
| Ophioglossum engelmannii | Limestone Adder's-tongue Limestone Adderstongue | |
| Oplismenus hirtellus | Basketgrass | |
| Oplismenus hirtellus ssp. setarius | Basketgrass | |
| Opuntia humifusa | Low Prickly Pear Smooth Prickly Pear Devil's Tongue | |
| Ophioglossum nudicaule | Least Adder's-tongue | |
| Ophioglossum petiolatum | Longstem Adder's-tongue | |
| Opuntia pusilla | Cockspur Prickly Pear Drummond's Prickly Pear | |
| Opuntia stricta | Erect Pricklypear | |
| Ophioglossum vulgatum | Southern Adder's-tongue Adder's-tongue Adder's-tongue Fern | |
| Orontium aquaticum | Goldenclub Neverwet | |
| Orbexilum lupinellum | Piedmont Leather-root | |
| Orbexilum pedunculatum | Sampson's Snakeroot | |
| Orbexilum pedunculatum var. psoralioides | Eastern Sampson's Snakeroot | |
| Orbexilum pedunculatum var. pedunculatum | Sampson's Snakeroot | |
| Orbexilum simplex | Singlestem Leather-root | |
| Orobanche uniflora | One-flowered Broomrape One-flower Cancer Root | |
| Osmanthus americanus | American Olive Devilwood Wild Olive | |
| Osmanthus americanus var. americanus | American Devilwood American Olive Devilwood | |
| Osmunda cinnamomea | Cinnamon Fern | |
| Osmunda cinnamomea var. cinnamomea | Cinnamon Fern | |
| Osmunda cinnamomea var. glandulosa | Cinnamon Fern Osmonde Cannelle | |
| Osmorhiza claytonii | Clayton's Sweetroot Hairy Sweet-cicely Sweet Jarvil | |
| Osmunda claytoniana | Interrupted Fern | |
| Osmorhiza longistylis | Longstyle Sweetroot Aniseroot Sweet-cicely Wild Licorice | |
| Osmunda regalis | Royal Fern | |
| Osmunda regalis var. spectabilis | Royal Fern | |
| Ostrya virginiana | Eastern Hop-hornbeam American Hop-hornbeam Woolly Hop-hornbean Eastern Ironwood Roughbark Ironwood Ironwood Deerwood Leverwood | |
| Oxydendrum arboreum | Sourwood Sorrel Tree | |
| Oxycaryum cubense | Cuban Bulrush | |
| Oxypolis filiformis | Water Cowbane | |
| Oxalis grandis | Great Yellow Woodsorrel Large Yellow Wood Sorrel | |
| Oxalis priceae | Tufted Yellow Woodsorrel | |
| Oxalis priceae ssp. priceae | Price's Wood-sorrel Tufted Yellow Woodsorrel | |
| Oxypolis rigidior | Stiff Cowbane | |
| Oxalis stricta | Common Yellow Oxalis Yellow Wood-sorrel Upright Yellow Wood-sorrel Yellow Woodsorrel | |
| Oxalis violacea | Violet Woodsorrel Violet Wood-sorrel | |
| Parkinsonia aculeata | Retama Paloverde Mexican Paloverde Jerusalem Thorn Horsebean Lluvia De Oro | |
| Paspalum acuminatum | Brook Crown Grass Brook Crowngrass Canoegrass | |
| Panicum amarum | Bitter Panicgrass Beachgrass Coastal Panic Grass | |
| Paronychia americana | American Nailwort American Whitlow-wort | |
| Paronychia americana ssp. americana | American Nailwort American Whitlow-wort | |
| Panicum amarum var. amarulum | Coastal Panic Grass Coastal Panicgrass | |
| Panicum amarum var. amarum | Bitter Panic Grass Bitter Panicgrass | |
| Panicum anceps | Beaked Panicgrass Beaked Panic Grass | |
| Packera anonyma | Small's Ragwort | |
| Parnassia asarifolia | Kidneyleaf Grass-of-parnassus Appalachian Grass-of-parnassus | |
| Packera aurea | Golden Groundsel Golden Ragwort Butterweed | |
| Parthenium auriculatum | Wild Quinine | |
| Paronychia baldwinii | Baldwin's Nailwort Dune Whitlow-wort | |
| Paronychia baldwinii ssp. baldwinii | Baldwin's Nailwort Dune Whitlow-wort | |
| Paronychia baldwinii ssp. riparia | Baldwin's Nailwort Dune Whitlow-wort | |
| Paspalum bifidum | Pitchfork Crown Grass Pitchfork Crowngrass Pitchfork Paspalum | |
| Paspalum boscianum | Bull Crown Grass Bull Crowngrass Bull Paspalum | |
| Paronychia canadensis | Smooth Forked Nailwort Forked Chickweed | |
| Paspalum caespitosum | Blue Crown Grass Blue Crowngrass Blue Paspalum | |
| Panicum capillare | Witchgrass | |
| Paspalum conjugatum | Hilograss Sour Crown Grass Sour Paspalum | |
| Paspalum denticulatum | Longtom Pull-and-Be-Damned | |
| Panicum dichotomiflorum | Fall Panicgrass Fall Panic Grass | |
| Paspalum dissectum | Mudbank Crowngrass | |
| Paspalum distichum | Knotgrass | |
| Panicum dichotomiflorum var. dichotomiflorum | Fall Panic Grass Fall Panicgrass | |
| Paronychia erecta | Square Flower Squareflower | |
| Paronychia erecta var. corymbosa | Square Flower Squareflower | |
| Paronychia erecta var. erecta | Square Flower Squareflower | |
| Paronychia fastigiata | Clusterstem Nailwort Hairy Forked Chickweed Hairy Forked Nailwort | |
| Paronychia fastigiata var. fastigiata | Hairy Forked Chickweed Hairy Forked Nailwort | |
| Panicum flexile | Wiry Witch Grass Wiry Panic Grass Stiff Witch Grass Slender Panic Grass | |
| Parietaria floridana | Florida Pellitory | |
| Paspalum floridanum | Florida Paspalum | |
| scientific name | common name(s) | image gallery |
