Part 4, 1924] FABACEAE: GALEGEAE 249 



cm. long; peduncle pilose and glandular; bracts subulate, 2-3 mm. long; calyx strigose, the 

 tube 2 mm. long, the lobes lanceolate, acuminate, 3 mm. long; corolla cream-white; pod 16- 

 seeded. 



Type LOCALITY: Chichen Ilza, Yucatan. 

 Distribution: Yucatan and Campechy. 



Illustrations: Field Mus. Publ. Bot. 1: pi. 13. 



Excluded species 



Bexthamantha glabrEsce.ms (Benth.) Alef. Bonplandia 10: 264. 1862. Tephrosia glab- 

 rescens Benth. Bot. Voy. Sulph. 81. 1S44. Cracca glabrescens Benth.; Benth. & Oerst. 

 Vidensk. Meddcl. 1853: 9. 1853. Britton.imara caribaea. glabrescens Kuntze, Rev. Gen. 165. 

 1891. This has been reported erroneously from Mexico. It is a native of Colombia. 



29. SPHINCTOSPERMUM Rose, Contr. U. S. 

 Nat. Herb. 10: 107. 1906. 



Annual herbs, with simple linear leaves. Flowers single or rarely paired in the axils, 

 short-pcdicelled. with minute bracts and no bractlets. Calyx turbinate, with 5 subequal 

 lobes. Corolla pinkish. Banner rounded-obcordate, with a very short claw. Wing-petals 

 short-clawed, the blade obliquely oblong with an acute basal auricle. Keel-petals strongly 

 lunate, united above almost semi-orbicular, with a prominent basal lobe. Stamens 10. 

 diadelphous, the upper filament free, the other nine united less than half their length, the 

 alternate ones shorter; anthers uniform. Ovary sessile; style slender, hairy near the top. 

 Pod linear, flat. 2-valved, transversely septate between the seeds. Seeds prismatic, con- 

 stricted at the middle, roughened. 



Type species, Tephrosia constricta S. Wats. 



1. Sphinctospermum constrictum (S. Wats.) Rose, 

 Contr. U. S. Nat. Herb. 10: 107. 1906. 



• Tephrosia constricta S. Wats. Proc. Am. Acad. 24: 46. 1889. 



Annual; stem simple or with a few ascending branches, 2-4 dm. high, glabrous or spar- 

 ingly strigose, slender; leaves sessile, simple, linear, 2-7 cm. long, 1-3 mm. wide, glabrous or 

 nearly so; pedicel 2-5 mm. long, jointed below the middle, recurved; calyx glabrous, the tube 

 about 1 mm. long, the lobes lanceolate, acute, somewhat spread 'rig, 1.5 mm. long: corolla 

 about 5 mm. ong; pod 3-4cm long, 3 mm. wide, glabrous, straight, pendent; seeds fully 2 mm. 

 long, nearly as broad, prismatic, constricted in the middle, the lateral angles with rounded ribs. 



Type locality: Guaymas, Sonora, 



Distribution: Arizona, Sonora, and Lower California. 



Illustrations: Contr. U. S. Nat. Herb. 10: pi. 34; Am. Jour. Bot. 11: pi. 36 V. 



Subtribe 9 COLUTEANAE. Shrubs or suffrutescent herbs. Leaves odd- 

 pinnate Flowers in axillary racemes; bracts and sometimes bractlets present. 

 Calyx campanulate, vlobed Corolla in ours rather showy. Stamens usually 

 diadelphous; anthers all alike. Style hairy on the upper margin. Pod in- 

 flated, papery, 1 -celled, often indehiscent. 



Style strongly hooked at the end, with the stigma subterminal in the sinus; 



petals nearly equal, broad; banner porrect; keel-petals blunt. 30. CoLUTEA. 



Style not hooked, with" a terminal capitate stigma; petals unequal, long and nar- 

 row; keel-petals acute, lunger than the banner and much longer than the wings. 31. Colutia. 



30 COLUTEA I,. Sp. PI. 723. 1753. 



Shrubs, with odd-pinnate leaves, small caducous stipules, and no stipels. Flowers 

 in axillary racemes; bracts minute or none. Calyx-tube campanulate; lobes short, subequal 

 or the upper two shorter. Corolla yellowish or reddish. Banner short-clawed, the blade 



