| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Commelinaceae | Commelina erecta var. angustifolia | Sand Dayflower | Dunes and dry sand flats on barrier islands, longleaf pine sandhills, other dry sandy sites, shale barrens, other dry rocky sites. | E. NC south to s. FL, west to TX, and north and west in the interior to IA, nw. NE, CO, and NM; also apparently in Central and South America. |  |
| Commelinaceae | Commelina erecta var. deamiana | Midwestern Dayflower | Usually in dry, sandy soils. | IN, IL, and IA south to AR, TX, NM, and AZ. |  |
| Commelinaceae | Commelina erecta var. erecta | Erect Dayflower | Dry openings and woodlands, especially in thin soil around rock outcrops, streambanks, riverbanks, mesic forests. | PA west to MO and e. KS, south to FL and TX; also apparently in Central and South America. |  |