| 1. Pistils 45(12); styles in fruit 26 cm, plumose; leaf lobes (3)59, from just below middle |
| P. mexicana var. stansburyana |
| 1' Pistils 1(3); styles in fruit < 1 cm, canescent at least below tip; leaf lobes 3(5), generally from above middle |
| P. tridentata |
| 2. Leaf upper surface sparsely nonglandular-hairy, sessile or sunken glands fewmany; twig hairs mostly glandular |
| var. glandulosa |
| 2' Leaf upper surface densely nonglandular-hairy, sessile or sunken glands 0few; twig hairs mostly nonglandular |
| var. tridentata
|