| | 1. Petiole dark brown to generally blackish; leaf blade upper surface with white exudate; Sierra Nevada |
| P. pallida |
| | 1' Petiole brown to reddish brown; leaf blade upper surface generally without exudate; California Floristic Province, East of Sierra Nevada, Desert Mountains |
| P. triangularis |
| | 2. Leaf blade upper surface not sticky, generally glabrous |
| subsp. triangularis |
| | 2' Leaf blade upper surface sticky or with sparse, minute, yellowish glands |
| |
| | 3. Leaf blade upper surface generally with sparse, minute, yellowish glands; 2° leaflets on basal surface of lowermost 1° leaflets deeply pinnately lobed to nearly 1-pinnate |
| subsp. maxonii |
| | 3' Leaf blade upper surface generally sticky; 2° leaflets on basal surface of lowermost 1° leaflets ± entire to shallowly pinnately lobed |
| subsp. viscosa
|