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......4 Leaflets 3-5× as long as wide, usually < 1.5 cm wide; infructescence nodes (fruits or aborted fruits) usually 1-3; fruits broadly ellipsoid or subspheroidal, <2× as long as wide; [se. SC south through GA Coastal Plain to ne. FL]
......4 Leaflets 1.7-3.2 (-5)× as long as wide, the larger typically > 2 cm wide; infructescence nodes (1-) 3-10; fruits usually ellipsoid, often > 2× as long as wide; [FL Panhandle, s. AL, and c. peninsular FL]
........5 Pod drying black to blackish-brown, leathery or tough.
..........6 Stems puberulent (sometimes inconspicuously so) or villous.
............ 7 Legume (20-) 30-40 (-50) mm long, 15-25 mm in diameter; pedicels 14-18 (-30) mm long, subtended by persistent bracts10-25 mm long and 7-10 mm wide
............ ..8 Petioles of median leaves 4-10 mm long
..........6 Stems glabrous and generally glaucous as well {B. alba, B. leucantha, B. leucophaea var. laevicaulis, B. australis var. aberrans, B. australis var. australis}