428 CLVi. CYPERACE^ (clarke). [Bnlbostylis. 



***Style 3-fid. Stem with 1 head of spikelets only (heads occasionally umbelled 

 in South African examples of B. cinnainomea). 



Stem glabrous at the top; sometimes scabrous or 

 obscurely hairy in B. colllna and B. laniceps. 

 Nut without longitudinal ribs or transversely 

 wavy lines. 

 Spikelets usually yV in. broad or more, 3-20 

 in a head. 

 Spikelets acute, minutely pubescent. 



Nut broadly obovoid . . . . 5. jB. harhata. 



Nut narrowly obovoid, . . .11. JS. cardiocarpa. 



Spikelets obtuse, with some long white 



hairs . . . . . . 8. JS. collina. 



Spikelets scarcely ^g in. broad, numerous, 



very closely packed .... 10. JS. laniceps. 



Nut with transverse (often very minute) wavy 

 lines; outermost cells longitudinally 

 oblong. 

 Stem 2-4 in. long with 2-1 spikelets . . Q. B. rarissima. 



Stem 18-24 ni. long; spikelets ^ in. long . 7. B. cinnamomea. 

 Stem 24-32 in. long; spikelets f in. long . 16. B. aphyllanthoides. 

 Nut longitudinally striate, horizontally tra- 

 beculate ; outermost cells transversely 

 oblong . . . . . . . \b. B. schimperiana. 



Stem minutely hairy at the top (see also B. collina 

 and B. laniceps above). 

 Bracts hardly longer than the head, suberect; • 

 plants sparsely hairy. 

 Spikelets ^ in. lonsr, numerous . . .9. B.jilamentosa. 



Spikelets \-\ in. long, usually 3-6 in a head. 

 Leaves setaceous. 



Spikelets acute \2. B. erratica. 



Spikelets obtuse 13. -B. atrosanguinea. 



Leaves very narrowly linear . . . 14. B. scleropus. 



Bracts conspicuous, spreading, green; whole 



plant hairy . . . . . . 17. ^. Buchanani. 



*##«Style 3-fid. Heads of spikelets umbelled (cf. also 7. B. cinnamomea). 

 t.iough stems with one head only are not rare. 



Rhizome woody ; nut transversely wavy, iiot 



striate lengthwise IS. B. Zeyheri. 



Annual, slender; nut striate lengthwise, and 



transversely barred 19. -S. trahecnlata. 



*****Style 3-fid. Spikelets numerous, all (or most) podicelled, not clustered. 

 Spikelets moie than \ in. long. 



Spikelet 1, rarely 2; leaf-sheaths bearded in 



the throat ...... 34. B. macra. 



Spikelets 3-5 ; leaf-sheaths glabrous in the 



throat ....... 35. B. megastachys, 



Spikelets less than \ in. long (only a few attaining 

 even ^ in. long). 

 Nut trabeculate, slenderly and obscurely striate 



lengthwise 29. -B. Johnstoni. 



Nut smooth, more or less transversely wavy, or 

 obscurely reticulate or dotted. 



