| | 1. Leaves ± lanceolate, shiny green, resinous |
| V. laciniata |
| | 1' Leaves ovate, dull green to canescent-tomentose |
| |
| | 2. Leaves short rough-hairy on both surfaces, 1–2.5 cm, triangular-ovate, often toothed; veins not strongly raised beneath |
| V. parishii |
| | 2' Leaves densely canescent-tomentose above, dull green and loosely tomentose beneath, 3–8 cm, not triangular, entire; veins prominently raised beneath |
| V. reticulata
|