Northern Prairie Wildlife Research Center
| Lead | Characteristic | Go To |
| 1 | Leaves oblanceolate to obovate, glabrous; flowers showy, white or bluish, 5-10 mm across. | Genus Heliotropium |
| 1 | Leaves linear, strigose; flowers inconspicuous, white, 1-2 mm across. | Genus Plagiobothrys |