[=][=] Leaves 3-foliolate. Ovules and seeds several. Flowers not yellow.
33. Phaseolus. Keel spirally coiled; standard recurved-spreading. Style bearded lengthwise. Flowers racemose. Seeds round-reniform.
34. Strophostyles. Keel long, strongly incurved. Style bearded lengthwise. Flowers sessile, capitate, few. Seeds oblong, mostly pubescent.
35. Centrosema. Calyx short, 5-cleft. Standard with a spur at the base; keel broad, merely incurved. Style minutely bearded next the stigma.
36. Clitoria. Calyx tubular, 5-lobed. Standard erect, spurless; keel scythe-shaped. Style bearded down the inner face.
37. Amphicarpæa. Calyx tubular, 4–5-toothed. Standard erect; keel almost straight. Style beardless. Some nearly apetalous fertile flowers next the ground.
38. Galactia. Calyx 4 cleft, the upper lobe broadest and entire. Style beardless. Bract and bractlets minute, mostly deciduous.
[=][=][=] Leaves 1–3-foliolate. Ovules and seeds only one or two. Flowers yellow.
39. Rhynchosia. Keel scythe shaped. Calyx 4–5-parted. Pod short.
Suborder II. Cæsalpinieæ. (Brasiletto Family.) Corolla perfectly or not at all papilionaceous, sometimes nearly regular, imbricated in the bud, the upper or odd petal inside and enclosed by the others, Stamens 10 or fewer, commonly distinct, inserted on the calyx. Seeds anatropous, often with albumen. Embryo straight.