342 



FABACEAE. 



Vol. II. 



High-climbing woody vines. 

 Trees or shrubs. 

 Herbs ; leaves 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, 2-celled, indehiscent. 



22, 



23- 

 24. 



Kraunhit 

 Robinia, 

 Sesban. 



25. Geoprumnon. 



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



26. 



27- 



Astragalus^ 

 Phaca. 



28. Homalobus. 

 2^, Kentrophyta. 



30. Orophaca. 



31. Oxytropis. 



32. Glycyrrhiza. 



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 3-foliolate. 

 Keel of the corolla acute. 

 Pod prickly ; foliage glandular-punctate. 



Tribe 8. Hedysareae. 



Leaves odd-pinnate. 



Flowers purplish, umbellate. 



Flowers purple or white, racemose. 



Flowers yellow, small. 

 Leaves 4-foliolate or 2-foliolate. 

 Leaves 3-foIiolate, 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. Vicieae. 



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 



33- 

 34- 

 35- 

 36. 



Coronilla. 

 Hedysarum, 

 AEschynomene. 

 Zornia. 



37, Stylosanihes. 



38. 

 39- 



40. 

 41. 



Meibomia, 

 Lespedeza. 



Vicia. 

 Lathyrus. 



42. Clitoria. 



43. Bradburya, 



keel of 



44. Glycine. 



45. Falcata. 



46. Galactia. 



47. Dolicholus. 



corolla not curved nor coiled. 

 Style glabrous, on pubescent below ; keel of corolla not curved nor coiled. 

 Standard spurred at the base. 

 Standard not spurred. 



Flowers blue, purple, purplish, or white. 

 Leaves odd-pinnate ; leaflets 5-7. 

 Leaves 3-foliolate, rarely i-foliolate. 

 Calyx tubular, not bracteolate. 

 Calyx short, bracteolate. 

 Flowers yellow. 

 Style bearded along the inner side ; rachis thickened at the insertion of the flowers. 



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



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



Keel of the corolla short, slightly incurved ; flowers capitate. 50. 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 sericea 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-petioled ; leaflets 7-25, short-stalked, obovate 

 or elliptic, obtuse or emarginate at the apex, narrowed 

 or cuneate at the base, 3"-6" long; raceme peduncled, 

 rather loosely flowered, 2'-^' 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, Arizona and Mexico. April-June. 



