Search by Common Name
27 records
| Common Name | Other Names | Scientific Name | Family |
|---|---|---|---|
| oak mistletoe | mistletoe, american christmas-mistletoe | Phoradendron serotinum ssp. serotinum | Viscaceae |
| oakleaf hydrangea | oak-leaf hydrangea | Hydrangea quercifolia | Hydrangeaceae |
| obedient plant | obedient-plant, fall obedient plant, false dragonhead, virginia lions-heart, obedience | Physostegia virginiana | Lamiaceae |
| oceanblue morning-glory | blue morningglory, oceanblue morningglory | Ipomoea indica | Convolvulaceae |
| october flower | Polygonella polygama | Polygonaceae | |
| oglethorpe oak | Quercus oglethorpensis | Fagaceae | |
| oklahoma grass-pink | oklahoma grasspink, prairie grasspink | Calopogon oklahomensis | Orchidaceae |
| okra | Abelmoschus esculentus | Malvaceae | |
| old field toadflax | canada toadflax, oldfield-toadflax, oldfield toadflax, blue toadflax | Nuttallanthus canadensis | Scrophulariaceae |
| old switch panic grass | switchgrass, wand panic grass | Panicum virgatum | Poaceae |
| oldfield milkvine | deceptive milkvine, deceptive spinypod, climbing milkweed | Matelea decipiens | Asclepiadaceae |
| oldplainsman | old plainsman, woolly-white | Hymenopappus artemisiifolius | Asteraceae |
| oleander | common oleander, laurel rosa | Nerium oleander | Apocynaceae |
| one flowered broomrape | naked broom-rape, naked broomrape, oneflowered broomrape, one-flower cancer root | Orobanche uniflora | Orobanchaceae |
| oneflower false fiddleleaf | smooth hydrolea, oneflower hydrolea | Hydrolea uniflora | Hydrophyllaceae |
| oneflower honeycombhead | Balduina uniflora | Asteraceae | |
| orange daylily | tawny day-lily, yellow day-lily | Hemerocallis fulva | Liliaceae |
| orange milkwort | Polygala lutea | Polygalaceae | |
| orangegrass | pineweed, pinweed st. johnswort, orangegrass | Hypericum gentianoides | Clusiaceae |
| oriental false hawksbeard | Youngia japonica | Asteraceae | |
| osage orange | osage-orange, bois d'arc, bodark, horse apple, hedge apple, naranjo chino, bow-wood | Maclura pomifera | Moraceae |
| oval-leaf sedge | ovalleaf sedge, oval-leaved sedge, one-headed sedge | Carex cephalophora | Cyperaceae |
| ovate false fiddleleaf | hairy hydrolea | Hydrolea ovata | Hydrophyllaceae |
| overcup oak | overcup-oak, swamp post oak, water white oak, swamp white oak | Quercus lyrata | Fagaceae |
| oxeye daisy | marguerite | Leucanthemum vulgare | Asteraceae |
| ozark milkvetch | bentpod milkvetch, bent milk vetch | Astragalus distortus | Fabaceae |
| ozarkgrass | ozark grass | Limnodea arkansana | Poaceae |