34- 



FABACEAE. 



Vol. I!. 



High-climbing woody vines. 

 Trees or shrubs. 

 Herbs ; lea\'es evenly pinnate. 

 Standard narrow ; our species all herbs. 



Pod not prickly ; foliage not glandular-punctate. 

 Keel of the corolla blunt. 

 Leaves pinnate, or simple. 



Pods not flattened, swollen, or one or both sutures intruded. 

 Pods fleshy, becoming spongy, ^-celled, indehiscent. 



22. 

 23- 



24. 



Kraunhia. 



Robinia, 



Sesban. 



5. Gcoprumnon. 



Pods not fleshy, dehiscent (epicarp slightly fleshy in Astragalus pectinalus). 



Pods not much swollen, leathery or papery 

 Pods much inflated, membranous, i -celled. 

 Pods flat, both sutures prominent externally. 



Leaves not bristle-tipped : pods several-seeded. 

 Leaves bristle-tipped : pods only 1-2-seeded. 

 Leaves j-foliolate. 

 Keel of the corolla acute. 

 Pod prickly ; foliage glandular-punctate. 



Tribe 8. Hedvsareae. 



Leaves odd-pinnate. 



Flowers purplish, umbellate. 



Flowers purple or white, racemose. 



Flowers yellow, small. 

 Leaves 4-foliolate or 2-foliolate. 

 Leaves 3-foliolate, the terminal leaflets stalked. 



Flowers yellow. 



Flowers purple, blue or white. 



Pod of several joints : leaflets stipellate. 

 Pod of I or 2 joints ; leaflets not stipellate. 



Tribe 9. A^icieae. 



Style slender, with a tuft of hairs at the summit. 

 Style flattened, bearded along the inner side. 



Tribe 10. Phaseoleae. 



Style bearded along the inner side ; rachis not thickened at the insertion of the flowers 



26. Astragalus. 



2y. Phaca. 



28. Homalobus. 



29. Kentrophyta. 



30. Orophaca. 



31. Oxytropis. 



32. Glycyrrhisa. 



33. Coronilla. 



34. Hcdysarum. 



35. AEschynomene. 



36. Zornia. 



37. Stylosanthes. 



38. Meibomia. 



39. Lcspedeaa, 



40. Vicia. 



41. Lathyrus, 



keel of 



keel of corolla not curved nor coiled. 



corolla not curved nor coiled 

 Style glabrous, or pubescent below 

 Standard spurred at the base. 

 Standard not spurred. 



Flowers blue, purple, purplish, or white. 

 Leaves odd-pinnate : leaflets 5-7, 

 Leaves 3-foliolate, rarely T-foIiolate. 



Calyx tubular, not bracteolate. ' 45. 



Calyx short, bracteolate, 46. 



Flowers yellow. 47- 



Style bearded along the inner side : rachis thickened at the insertion of the flowers, 



Keel of the corolla spirally coiled ; flowers racemed. 48. 



Keel of the corolla strongly incurved ; flowers purple, capitate. 49. 



Keel of the corolla short, slightly incurved ; flowers capitate. 50. 



42. Clitoria. 



43. Bradburya. 



44. Glycine. 



Falcata. 



Galactia. 



Dolicholus. 



Phaseolus. 



Stiophostyles. 



Vigna, 



I. SOPHORA L. Sp. PI. 373. 1753- 



Shrubs, perennial herbs, or in tropical regions trees, with odd-pinnate leaves and white 

 yellow or violet flowers in terminal racemes or panicles. Calyx generally campanulate, its 

 teeth short. Standard obovate or orbicular, erect or spreading; wings obliquely oblong; keel 

 oblong, nearly straight. Stamens all distinct or very nearly so; anthers versatile, all alike; 



style incurved. Ovary short-stalked ; ovules 00. Pod 

 stalked in the calyx, coriaceous or fleshy, terete, con- 

 stricted between the subglobose seeds, mainly inde- 

 hiscent. [Arabic, yellow.] 



About 25 species, natives of warm and tropical regions. 

 Besides the following, about 5 others occur in the south- 

 ern States, Type species : Sophora alopecuroides L. 



I. Sophora sericea Nutt. Silky Sophora. 

 Fig. 2449. 



Sophora scricca Nutt. Gen. i : 280. 1818. 



Herbaceous, woody at the base, erect or ascending, 

 branched, silky or silvery pubescent with appressed 

 hairs, 6'-i2' high. Stipules subulate, deciduous ; leaves 

 short-ipetioled ; leaflets 7-25, short -stalked, obovate 

 or elliptic, obtuse or emarginate at the apex, narrowed 

 or cuneate at the base, 3"^" long; raceme peduncled, 

 rather loosely flowered, 2'-4' long ; flowers white, 

 about 8'' long, nearly sessile; pod dry, coriaceous, 

 i'-2' long, about 2" thick, pubescent, few-seeded. 



Plains and prairies. South Dakota, Nebraska and 

 Wyoming to Texas, .\rizona and Mexico. .-^pril-June. 



