| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Apocynaceae | Asclepias tuberosa var. 1 [=terminalis] | Western Butterflyweed | Prairies. | SD, CO, s. UT south to e. TX, s. TX, s. NM, s. AZ, and Mexico (TAM, NLE, COA, CHH, and SON). | |
| Apocynaceae | Asclepias tuberosa var. 2 | Scrub Butterflyweed | Florida scrub. | Endemic in c. FL peninsula. |  |
| Apocynaceae | Asclepias tuberosa var. cordata | Midwestern Butterflyweed | Dry forests, roadbanks. | QC, ON, MN, SD, CO, UT, and CA south to PA, WV, KY, TN, and AL. |  |
| Apocynaceae | Asclepias tuberosa var. rolfsii | Sandhill Butterflyweed | Longleaf pine sandhills, other dry, sandy habitats. | Se. VA south to s. FL, west to s. MS. |  |
| Apocynaceae | Asclepias tuberosa var. tuberosa | Eastern Butterflyweed | Woodland margins, roadsides, pastures. | S. NH west to OH, south to Panhandle FL and e. TX. |  |