Key for Pilea Lindl.

1Plants entirely glabrous.
1'Plants hairy, at least on the stems.
2Blade with uninervate venation.
2'Blade with pinnate or subtriplinerved venation.
3Leaves 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.
4Stipules 0.5-3 mm long.
4'Stipules ca. lO mm long.