66 xlvii. § papilionace^: (baker). [Indigofera. 



un<Hiiculate ; wings oblong", adhering a little to the keel ; keel obtuse 

 or acuminate, gibbous or spurred on both sides. Upper stamen free 

 from the base, the others connate ; anthers uniform, the connective 

 forming an apiculus. Ovary sessile or nearly so, usually with several, 

 sometimes with only one or two ovules ; style glabrous ; stigma capi- 

 tate. Pod linear or oblong, rarely globose, straight or curved, terete 

 or tetragonous or compressed, septate internally.— Herbs or shrubs of 

 very various habit, more or less clothed with adpressed silky hairs 

 fixed by the middle, and sometimes also with laxer pubescence. Leaves 

 in our species simple or pinnately 3- oo-foliolate. 



A large genus, nearly restricted to the Tropics, except in South Africa, with a greater 

 number of species in Africa than anywhere else, not less than 200, including the Cape 

 and Mascarene forms. 



§ Acanthonotus, Benth. Ovary uniovulate. Pod short, falcate, subtriquetrous, 

 the dorsal suture dilated and prickly. 

 The only species I. I. echinata. 



§§ Sphaeridiophora, Desv. Pod small, subglobose or ovoid, 1-seeded, unarmed. 



Leaves simple} linea"r, silvery 2.1. linifolia. 



Leaves iraparipinnate, not silvery. 



Leaflets 3-5, 3 lines long 3. I. terminate. 



Leaflets 5-7, 6-8 lines long 4. I. congesta. 



Leaflets 7-13 5. 7. macrocalyx. 



§§§ Euindigofera. Pods linear, terete or sub tetragonous, 2- or many- seeded, 

 unarmed. 



Group 1 . Simplicifolise. — Leaves simple. 



Inflorescence copiously panicled. 



Pod terete, glabrous, 4-seeded 6. 7. paniculata. 



Pod subc impressed, villose, 2-seeded 7. I. procera. 



Flowers 1-2, pedicellate in the axils of the leaves. 



Leaves obovate, ^ in. long 8. 7. Bainesii. 



Leaves linear, 1 in. long 9. I. tetrasperma. 



Flowers in dense sessile axillary clusters . . . . . . ' . 10. I. cordifolia. 



Flowers in lax axillary racemes. 

 Leaves linear, subsessile. 



Pod under an inch'long, 5-6-seeded 11. I. simplicifolia. 



Pod 1^-2 in., long, 12-1 5-seeded 12. I. macrocarpa. 



Leaves oblong or lanceolate, short-stalked. 



Herbaceous, with copious soft spreading pubescence. 



Petiole 1-2 lines long ; racemes 2-8-flowered .... 13. I. erythrogramma. 

 Petiole 4 in. long; racemes 15-2 0-flowered .... 14. I. flavicans. 



Shrubby, with adpressed grey bristles 15. 7. Knoblecheri. 



Leaves obovate subsessile 16. I. bongensis 



Leaves round-obovate, stalked 17. I. nummularia. 



Group 2. Conjugate. — Leaflets 2, a large terminal one and a small lateral one. 



Leaflets suborbicular, argenteous 18. I. diphylla. 



Leaflets oblanceolate, glabrescent 19. I. conjugata. 



Group 3. Capitatae.— Leaves imparipinnate. Flowers in dense terminal heads. 



Bracts leaflike, pinnate 20. I. capitata. 



Bracts broad, trifid, densely imbricated 21. 7. strobilijera. 



