Key for Dorstenia L.

1	Inflorescences (sub)quadrangular in outline, irregularly lobed. Dorstenia contrajerva
1'	Inflorescences orbicular in outline, entire. 2
2	Inflorescences bisexual. Dorstenia brasiliensis
2'	Inflorescences unisexual. Dorstenia cayapia subsp. asaroides