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.
..2 Lower leaf surface glabrous or pubescent only along the main veins; leaves averaging 4× as long as wide
..2 Lower leaf surface densely puberulent; leaves averaging 2× as long as wide
....3 Most the stem hairs 0-0.5 mm long (sometimes with a few scattered longer hairs), gland-tipped; leaves predominantly connate-perfoliate, the joined base 3-9 cm wide); style exserted beyond the corolla
......4 Stem pubescence uniformly of long, shaggy with hairs to 3 mm long; upper leaf surface with appressed setae up to 1 mm long.
........5 Leaves moderately hairy below
........5 Leaves glabrous or glabrescent below