| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Poaceae | Dichanthelium ovale var. addisonii | Low Stiff Witchgrass | Dry to damp sandy woods and fields. | Massachusetts and Minnesota south to Panhandle Florida and Texas, also in n. Mexico. |  (c) Horn, Jay |
| Poaceae | Dichanthelium ovale var. ovale | Oval-flowered Witchgrass | Dry to damp sandy pinelands. | New York to Wisconsin, south to s. Florida and e. Texas and n. Mexico. Infrequent over most of its range except Florida. |  (c) Horn, Jay |