1 | Plants entirely glabrous. |
1' | Plants hairy, at least on the stems. |
2 | Blade with uninervate venation. |
2' | Blade with pinnate or subtriplinerved venation. |
3 | Leaves unequal in size and shape; blade up to 5 cm long. |
3' | Leaves equal or unequal in size but not in shape; blade upto 13 cm long. |
4 | Stipules 0.5-3 mm long. |
4' | Stipules ca. lO mm long. |