FABACEAE 595 



gg Flowers in terminal or axillary clusters or racemes. 42. DOLICHOLUS. 



ft Corolla blue, purple, white or scarlet. 



Pods terete, torulose : corolla scarlet. 43. ERYTHRINA. 



Pods flattened, not torulose : corolla blue, purple or white. 

 Calyx subtended by 2 bractlets. 



Standard and the filament opposite partially adnate. 44. DIOCLEA. 



Standard and the filament opposite free from each other. 45. GALACTEA. 



Calyx without bractlets. 46. FALCATA. 



** Standard spurred at the base. 47. BRADBURYA. 



b. Style bearded along: the inner side. 48. CLITORIA. 



B. Keel of the corolla coiled or curved. 

 Keel spirally twisted. 



Leaflets not stipellate 5 or more. 49. APIOS. 



Leaflets stipellate 3. 50. PHASEOLUS. 



Keel incurved. 



Inflorescence capitate. 



Pods flattened. 51. STROPHOSTYLES. 



Pods nearly terete. 52. VIGNA. 



Inflorescence racemose. 53. CANAVALIA. 



TRIBE XI. VICIEAE. 



Style terete, with a tuft of hairs at the apex. 54. VICIA. 



Style flattened, pubescent along the inner side. 55. LATHYRUS. 



1. SOPHORA L. 



Unarmed shrubs or trees, or rarely perennial herbs. Leaves alternate, deciduous or 

 persistent, with minute deciduous stipules : blades unequally pinnate : leaflets opposite, 

 sometimes with bristle-like stipels. Flowers perfect, in terminal or axillary racemes. 

 Calyx pedicelled : tube campanulate, often oblique : lobes 5. Corolla white, yellow or 

 violet. Petals 5, with claws, all of which are about equal in length : standard with a sub- 

 orbicular blade notched at the apex, truncate or subcordate at the base : wings oblong- 

 spatulate, slightly oblique, the blade auricled or truncate at the base : keel-petals much like 

 the wings. Stamens 10. Filaments distinct or nearly so : anthers versatile. Ovary nar- 

 row, short-stalked. Style subulate, incurved. Pod nearly terete, moniliform fleshy, 

 leathery or woody, indehiscent or tardily dehiscent. Seeds globose, each in a separate 

 cavity. 



Perennial herbs. 1. S. tericca. 

 Shrubs or trees. 



Calyx less than 4 mm. long. 2. S. affinia. 

 Calyx over 4 mm. long. 



Leaflets smooth : racemes elongated, mostly over 20 cm. long. 3. S. tomento$a. 



Leaflets reticulated : racemes thick, usually less than 10 cm. long. 4. S. secundiflora. 



1. Sophora sericea Nutt. Herbaceous, pubescent with silvery or silky appressed 

 hail's. Stems branching at the base, the branches 1-3 dm. tall : leaves 3-8 cm. long ; 

 leaflets 7-25, the blades oblong, elliptic, or obovate, 5-12 mm. long, obtuse or notched at 

 the apex : racemes 3-12 cm. long, peduncled : calyx oblong, 7-9 mm. long ; tube oblique 

 at the base ; lobes ovate, obtuse, much shorter than the tube : corolla white ; standard 

 with a dilated blade about 1 cm. broad : keel-petals 13-16 mm. long : pods leathery, 2.5-5 

 cm. long, becoming hard, constricted between the seeds. 



On prairies, Nebraska to Colorado, Texas and Arizona. Spring and summer. 



2. Sophora affinis T. & G. An almost glabrous shrub or small tree sometimes 6 m. 

 tall, with spreading branches. Leaves 1-2 dm. long ; leaflets firm, 13-15, the blades 

 elliptic or oval, 1-4 cm. long, mucronate, somewhat lustrous above : racemes slender, 5-15 

 cm. long, ascending : pedicels 1-10 mm. long : calyx campanulate, less than 4 mm. long, 

 shallowly 5-lobed : corolla white or pink ; petals all with short claws ; standard with a sub- 

 orbicular blade 1-1.5 cm. broad ; other petals with oblong-ovate blades : pods 3-8 cm. long, 

 pubescent, more or less strongly constricted between the seeds. 



On limestone prairies, Arkansas to Texas. Spring and summer. 



3. Sophora tomentosa L. A shrub 1-3 m. tall, with tomentose foliage. Leaves 

 1-2 dm. long ; leaflets 11-17, the blades leathery, oblong, oblong-obovate or oval, inequi- 

 lateral, becoming glabrous and revolute : racemes elongating, 1-4 dm. long : pedicels 5-10 

 mm. long : calyx oblong or oblong-funnelform, 5-8 mm. long, constricted at the base, the 

 edge undulate or indistinctly 5-lobed : corolla yellow ; standard with an ovate blade fully 

 1 cm. broad, and over 1.5 cm. long : keel-petals 20 mm. long : pods 5-10 cm. long, strongly 

 constricted between the seeds, long-stalked. 



Along or near the coast, peninsular Florida and the Keys. Spring to fall. 



4. Sophora secundiflora (Ortega) DC. A shrub or small tree sometimes 10 m. tall, 

 with upright branches. Leaves 1-1.5 dm. long ; leaflets leathery, 7-13, the blades oblong 



