Northern Prairie Wildlife Research Center
| Lead | Characteristic | Go To |
| 1 | Leaves mainly basal; flowers yellow, the tepals 5-12 mm long; ovary inferior. | Genus Hypoxis |
| 1 | Leaves cauline; flowers orange-red with dark spots (very rarely solid yellow), the tepals 4-8 cm long; ovary superior. | Genus Lilium |