27. Desmodium. Stamens diadelphous (9 and 1) or monadelphous below. Calyx 2-lipped. Pod several-jointed. Flowers all of one sort and complete. Leaflets stipellate. 28. Lespedeza. Stamens diadelphous (9 and 1); anthers uniform. Pod 1--2-jointed. Flowers often of 2 sorts, the more fertile ones apetalous. Leaflets not stipellate. 29. Stylosanthes. Stamens monadelphous; anthers of 2 sorts. Pod 1--2-jointed. Calyx deciduous, the tube narrow and stalk-like. Leaflets not stipellate. [+][+][+][+] Herbs with abruptly pinnate leaves, terminated by a tendril or bristle; stamens diadelphous; pod continuous, 2-valved, few--several-seeded. (VICIEÆ.) 30. Vicia. Wings adherent to the keel. Style filiform, bearded with a tuft or ring of hairs at the apex. 31. Lathyrus. Wings nearly free. Style somewhat dilated and flattened upwards, bearded down the inner face. [+][+][+][+][+] Twining (sometimes only trailing) herbs, leaves pinnately 3- (rarely 1- or 5--7-) foliolate; no tendrils; peduncles or flowers axillary, pod not jointed, 2-valved. (PHASEOLEÆ.) [=] Leaves pinnate. 32. Apios. Herbaceous twiner; leaflets 5--7. Keel slender and much incurved or coiled. [=][=] 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. [*] Flowers imperfectly papilionaceous, perfect. Trees. 40. Cercis. Calyx campanulate, 5-toothed. Pod flat, wing-margined. Leaves simple. [*][*] Flowers not at all papilionaceous, perfect. Calyx 5-parted. Herbs. 41. Cassia. Leaves simply and abruptly pinnate, not glandular-punctate. 42. Hoffmanseggia. Leaves bipinnate, glandular-punctate. [*][*][*] Flowers not at all papilionaceous, polygamous or diœcious. Trees.