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1 Leaflets > 2, generally 4-12; [native species of various habitats]. |
..2 Foliaceous stipules laterally symmetrical, with 2 approximately equal basal lobes; leaves somewhat fleshy; [plants of ocean beaches and dunes] |
..2 Foliaceous stipules asymmetrical, oblique at the base, the basal lobe well-developed only on one side. |
....3 Leaflets (8-) 10-14 per leaf, generally irregular arrayed; [plants of dry to mesic forests] |
....3 Leaflets (4-) 6-10 per leaf, generally paired; [plants of various dry or wet habitats]. |
......4 Racemes with 5-15 (-20) flowers; corollas white to cream, 10-14 mm long |
......4 Racemes with 2-6 (-9) flowers; flowers pink to purple, 15-28 mm long. |
........5 Corollas 20-28 mm long; leaflets (4-) 6-10 per leaf; [Great Plainsian, east to c. OK] |
........5 Corollas 15-20 mm long; leaflets (4-) 6 per leaf; [northern, south to NC, GA, AL, MO, NE] |
1 Leaflets 0-2; [alien species, except L. pusillus]. |
..........6 Leaflets absent (but with foliaceous stipules) |
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............ 7 Stems not winged or flanged; corollas 10-15 mm long; flowers 3-10 per inflorescence. |
............ ..8 Corollas yellow |
............ ..8 Corollas red-purple |
............ 7 Stems winged; corollas 6-30 mm long; flowers 1-15 per inflorescence. |
............ ....9 Stems with wings 0-1 (-2) mm wide; corolla 6-14 mm long; flowers 1-3 (-4) per raceme. |
............ ......10 Legume (in fruit) and ovary (in flower) hirsute with swollen-based hairs; corolla 9-14 mm long |
............ ......10 Legume (in fruit) and ovary (in flower) glabrous; corolla 6-9 mm long |
............ ....9 Stems with wings 1-3 mm wide; corolla 13-30 mm long; flowers 2-12 per raceme. |
............ ........11 Stems hirsute with swollen-based hairs; plant an annual; flowers 2-4 per raceme |
............ ........11 Stems glabrate; plant a perennial; flowers (3-) 4-12 per raceme. |
............ ..........12 Stipules 4-10 mm wide; leaflets 2-5× as long as wide |
............ ..........12 Stipules 2-3 mm wide; leaflets 6-15× as long as wide |
1 Tendrils present on plant; leaves modified into tendrils (leaflike structures present clearly interpretable as stipules); [tribe Fabeae]. |
..2 Legume 4-7 mm wide; corolla 10-13 mm long |
..2 Legume 12-20 mm wide; corolla 18-25 mm long |
1 Tendrils absent; leaves or stipules present on plant and interpretable as leaves with 1 leaflet. |
....3 Leaflet blades roundish, 0.6-1.5× as long as wide. |
......4 Leaves with a well-developed petiole, > 0.5 cm long. |
........5 Leaflet margins dentate; corollas white to pink; [tribe Psoraleeae] |
........5 Leaflet margins entire; corollas yellow; [tribe Phaseoleae] |
......4 Leaves sessile, subsessile, or perfoliate. |
..........6 Corolla bright or creamy yellow; stamens separate; leaves all 1-foliolate; leaflet blades perfoliate or sessile; [tribe Thermopsideae] |
..........6 Corolla violet to blue (drying pale); stamens diadelphous; leaves 1-foliolate and with some leaves 3-foliolate or 2-foliolate; leaflet blades cuneate, subsessile; [tribe Psoraleeae] |
....3 Leaflet blades elongate, 1.5-15× as long as wide. |
............ 7 Leaves basally disposed. |
............ ..8 Leaflet blades elliptic, widest near the midpoint of the blade; flowers pink, rose, or purplish; legume straight; [native of the Coastal Plain, se. NC south to s. FL, west to e. LA]; [tribe Genisteae] |
............ ..8 Leaflet blades oblanceolate, widest well past the midpoint of the blade; flowers yellow; legume coiled; [rare waif]; [tribe Loteae] |
............ 7 Leaves all or primarily cauline. |
............ ....9 Leaves long-petioled, the petiole > 2 cm long. |
............ ......10 Petiole winged its entire length; leaflet blade 2-4× as long as wide, sagittate at the base; foliage not glandular; [tribe Phaseoleae] |
............ ......10 Petiole not winged; leaflet blade 8-15× as long as wide, cuneate at the base; foliage glandular-punctate; [tribe Psoraleeae] |
............ ....9 Leaves sessile, subsessile, or short-petiolate, the petiole < 1.5 cm long. |
............ ........11 Stamens monadelphous; corolla yellow, 8-30 mm long; [tribe Crotalarieae] |
............ ........11 Stamens diadelphous; corolla purple, lavender, or cream, 5-15 mm long. |
............ ..........12 Corolla 11-15 mm long, purple; [se. and s. TX]; [tribe Diocleae] |
............ ..........12 Corolla 5-7 mm long, lavender or cream; [widespread in our area] |
............ ............ 13 Flowers solitary in leaf axils; [tribe Loteae] |
............ ............ 13 Flowers in racemose inflorescences; [tribe Desmodieae] |