Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.
1 Fruit truncate at the apex, glabrous, with longitudinal ribs acute and winglike; annual
..2 Leaves well-distributed throughout the plant; inflorescences axillary and terminal; branches spreading-villous or hispid to minutely and finely pubescent
..2 Leaves mostly concentrated in the basal ½ of the plant; inflorescences mostly terminal; branches glabrate or glabrous