| 1 | Leaves unifoliolate |
| 1' | Leaves trifoliolate |
| 2 | Leaflets membranous, with serrate margins, adaxially dull, abaxially puberulent, especially along veins, the apex acuminate to acute |
| 2' | Leaflets chartaceous-coriaceous, with subentire or crenate-serrate margins, adaxially shiny, abaxially glabrous, the apex acute, obtuse and retuse, or subacuminate |
| 3 | Leaflets abaxially conspicuously appressed-pubescent |
| 3' | Leaflets abaxially glabrous or puberulent, if pubescent, hairs only along the veins |
| 4 | Leaflets chartaceous, obtuse to acute at apex; petioles tomentulose or sparsely pubescent, terete or nearly so |
| 4' | Leaflets membranaceous, acuminate or long-acuminate at apex; petioles glabrous, puberulent or appressed-pubescent, flattened, canaliculate |
| 5 | Leaflets with entire or wavy margins; axillary inflorescences unbranched (racemiform); pistillate flower with stipitate ovary; petals ca. 1.2 mm long; monocarps 1.2-1.5 cm long |
| 5' | Leaflets with serrate or obtusely serrate margins; axillary inflorescence branched (at least with a basal branch); pistillate flowers with sessile ovary; petals ca. 2.2. mm long; monocarps 5-8 mm long |
