SECTION II: ANALYTICAL KEY TO SPECIES 79 



t6 Leaves thick, leathery, smooth, often glabrescent, 

 lobes ovate-acute, slightly constricted below, 

 gland-dots very prominent ; bracteoles toothed 

 or entire, deeply cordate ; flowers large, yellow, 

 with purple claws 



20. G. N. var. Roji. . . . (p. 134). 

 t7 Leaves quite glabrous, deeply segmented, and with 

 supplementary teeth in the sinuses ; bracteoles 

 broad ovate, with margins almost deeply laci- 

 niate ; flowers yellow, with purple claws 



21 G. N. var. soudanensis. . . (p. 138). 



*** Leaves less than half -cut into 5 (more rarely 3 or 7) lobes, which 

 are constricted beloio (ogee-shaped) obtuse or acute, distinctly 

 cordate, central vein only bearing a gland below. 



t Leaves stellately pilose, 3- or 5-lobed, lobes 

 obovate-oblong, obtuse, suddenly and minutely 

 bristle-tipped ; bracteoles ovate-acute, entire, or 

 toothed on the apex only, not very profoundly 

 cordate ; flowers yellow, with purple claws 



22. G. obtusifolium (type). . . (p. 139). 

 t2 Leaves ovate-rotund, often coated with persistent 



hairs, lobes 5-7 (rarely 3), ovate-oblong, acumi- 

 nate, the sinus narrow and thrown up in folds ; 

 bracteoles relatively small, ovate-acute, deeply 

 toothed on upper half of margin 



23. G. o. var. Wightiana. , . (p. 143). 

 t3 Leaves a little more drawn out and lobes more 



constricted below than in f2; bracteoles sub- 

 rotund, shortly and coarsely toothed around the 

 margin . . 24. G. o. var. africana. . . . (p. 153) 

 t4 Leaves almost reniform, distinctly cordate-auricu- 

 late, leathery in texture, glabrescent on maturity, 

 less than half-cut into 5-7 lobes, which are 

 broad ovate -rotund, suddenly acute or acumi- 

 nate; bracteoles large, broadly ovate-obtuse, 

 profoundly cordate, only very slightly united, 

 gashed into 7-9 fairly long teeth 



25. G. herbaceum (type). . . (p. 155). 



