| 1. Flower quickly reflexed, fruit reflexed; leaves basal and generally 13 cauline; inflorescence a loose raceme |
| O. deflexa var. sericea |
| 1' Flower and fruit ascending or erect; leaves all basal; inflorescence densely spike- or head-like |
| |
| 2. Leaflets 2339; plant green, puberulent, sticky-glandular; corolla 1218 mm |
| O. borealis var. viscida |
| 2' Leaflets 717; plant silvery or gray, silky or tomentose, not glandular; corolla 710 mm |
| |
| 3. Flowers 212 per inflorescence; fruit ovoid-inflated, ± 79 mm wide, papery |
| O. oreophila var. oreophila |
| 3' Flowers 13 per inflorescence; fruit lanceolate, ± 56 mm wide, leathery |
| O. parryi
|