70 
21. Sesbania. Leaflets with or without stipels: flowers in axillary loose racemes: 
pod usually stipitate. 
d. Perennial herbs: standard narrow and erect: pod turgid or inflated. 
22, Astragalus. Keel not tipped with a point or sharp appendage: pod with 
one or both the sutures turned in, sometimes dividing the cell lengthwise into two. 
23. Oxytropis. Keel tipped with an erect point: otherwise as Astragalus. 
24. Glycyrrhiza. Flowers, etc., of Astragalus: anther-cells confluent: pod 
prickly or muricate, short, nearly indehiscent. 
+ + + Herbs with pinnately 1 to 3-foliolate leaves (digitately 2 or 4-foliolate in Zor- 
nia): no tendrils: pod transversely 2 to several-jointed, the reticulated 1-seeded 
joints indehiscent, or sometimes reduced to one such joint. 
95. Zornia. Leaves digitately 2 to 4-foliolate: flowers yellow: stamens monadel- 
phous, anthers of 2 sorts: pod 2 to 5-jointed. 
96, Desmodium. Flowers white or purplish : stamens diadelphous (9 and 1) or 
monadelphous below, anthers uniform : leatlets stipellate: pod several-jointed. 
27, Lespedeza. Flowers white or purplish: stamens diadelphous (9 and 1), an- 
thers uniform: leaflets not stipellate: pod 1 (rarely 2)-jointed. 
_ +++ Herbs with abruptly pinnate leaves terminated by a tendril or bristle: sta- 
mens diadelphous: pod continuous, 2-valved, few to several-seeded. 
98. Vicia. Wings adherent to the keel: style filiform, bearded with a tuft or ring 
of hairs at the apex. 
2), Lathyrus. Wingsnearly free: style somewhat dilated and flattened upwards, 
bearded down the inner face. 
+++ Twining or trailing herbs: leaves pinnately 3 (rarely 1, or 5 to 7)-foliolate: 
no tendrils: peduncles or flowers axillary : pod not jointed, 2-valved. 
a+ Leaves 3 to 7-foliolate: flowers brown-purple. 
30. Apios. Ilerbaceous twiner: keel slender and much incurved or coiled. 
4+ ++ Leaves usually 3-foliolate: flowers not yellow. 
31. Centrosema. Calyx short, 5-cleft: standard with a spur at the base: keel 
broad and merely incurved: style minutely bearded next the stigma. 
32. Clitoria. Calyx tubular, 5-lobed: standard erect and spurless: keel scythe- 
shaped: style bearded down the inner face. 
33. Cologania. Calyx tubular, 4-toothed: pod stipitate: style beardless: bracts 
prominent and persistent. 
34, Galactia. Calyx 4-cleft, the upper lobe broadest and entire: pod subsessile: 
style beardless: bracts minute and deciduous. 
35, Phaseolus. Calyx 5-toothed or cleft: keei strongly incurved or coiled ; stand- 
ard recurved spreading: style bearded lengthwise. 
a+ 4+ ++ Leaves 1 to 3-foliolate: flowers yellow. 
36. Vigna. Calyx 4-toothed: keel straight: style bearded above: pod terete and 
torulose, several-seeded. 
37. Rhynchosia. Calyx 4 or 5-parted: keel seythe-shaped or incuryed: style beard- 
less: pod short and flat, 1 or 2-seeded. 
Il. CHSALPINIEZ. Corolla imperfectly or not at all papilionaceous, sometimes 
nearly regular, the upper petal inclosed by the others,in bud: stamens 10 or fewer, 
cowmonly distinct, inserted on the calyx. 
* Flowers imperfectly papilionaceous, perfect: trees. 
38, Cercis. Calyx campanulate, 5-toothed: pod flat, wing-margined: leaves 
simple. 
** Flowers not at all papilionaceous, perfect: calyx 5-parted. 
+ Herbs (occasionally shrubby). 
39, Cassia. Leaves simply and abruptly pinnate, not glandular-punctate. 
