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 Herb, 1-4 dm tall; leaflets 5-15 mm long; corollas white to cream; [c. KS, c. OK, nc. TX, westwards]
..2 Leaflets 1.5-2× as long as wide; leaflet lower surface densely tomentulose; [native of s. TX southwards, and introduced in s. FL]
..2 Leaflets (1.5-) 1.8-2.5× as long as wide; leaflet lower surface sparsely pubescent at maturity; [of s. FL]