| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Poaceae | Sporobolus compositus var. compositus | Tall Dropseed | Diabase glades and barrens, limestone glades and barrens, disturbed areas over diabase or calcareous rocks. | The general range is centered in the Plains, but extending east into ne. United States. This species and variety are reported for NC in a revision of the S. asper group (Riggins 1977); little is known about the occurrence of this species in NC. |  |
| Poaceae | Sporobolus compositus var. drummondii | Drummond’s Dropseed | Glades, barrens, roadsides, disturbed areas, over calcareous substrates. | East to the Ridge and Valley province of e. TN (Chester et al. 1993), occurring over limestone, and in sw. SC (on mafic rocks at Wadakoe Mountain), and allegedly also in GA (Kartesz 2015). It could very likely occur in sw. VA, as it is in Hawkins County, TN, immediately adjacent to VA (Chester et al. 1993). |  |
| Poaceae | Sporobolus compositus var. macer | Wet and dry pinelands, prairies, dry woodland margins. | MO and KS south to LA and e. TX. |