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CLVI. CYPERACE.E (cLARKE). 



[ Fim hristylis. 



tyle 2-ficl 

 2. F. dipsacea. 



3. F. squarrosa. 



^'"'fDlCSElOSTYLis. — Stfcm with several (usually very many) spikelets ; 

 lower 'ertile glumes in many spirals. 



Xut linear-oblong ; glumes aristate 

 Xut obovoid. 



Style-base witb a ring of pendent hairs nearly as 



long as the nut ..... 

 Style-base without long pendent hairs. 

 Nut conspicuously 8-ribbed lengthwise. 



Glumes boat-shaped ; spikelet slightly 

 polygonal ..... 



Glumes concave ; spikelets terete 

 Nut smooth, sometimes obscurely reticulate, 

 scarcely ribbed. 

 Stem hairy at the top ; spikelets cuboid 

 Stem glabrous at the top ; spikelets ovoid 

 to cylindric. 

 Glumes at the upper half of the back grey 

 ' by reason of minute depressed hairs. 

 Glumes on the upper half of the back 

 glabrous. 

 Spikelets 15-20; glumes obtuse 

 Spikelets 60-80 j glumes acuminate . 



F. dichotoma. 

 F. diphylla. 



6. F. pilosa. 



7. F ferruginea.. 



F. longiculmis. 

 F. nigritana. 



vv:::Xeichelosttlis. — stem with several or many spikelets ; style 3-fid; I'oweir 

 fertile glumes in many spirals. 

 Spikelets not clustered. 



Spikelets usually less than 12 to the umbel, 

 except in F. cioniana. 

 Plants with fine long white hairs. 

 Nut with transverse wavy lines. 



Nut large, whitish ; spikelets 3-14 . 10. F. exilis. 

 Nut smaller, yellowish ; spikelets 10-25 12. F, cioniana. 

 Nut not wavy, smaller than in F. exilis . 11. F. Hensii. 

 Plants without long white hairs, very nearly 

 glabrous. 

 Glumes much acuminate ; spikelets sub- 

 acute ...... 



Glumes obtuse ; spikelets obtuse, ellipsoid . 

 Spikelets nearly always more than 12 to the 

 umbel. 

 Nut longitudinally striated, with transverse 

 bars between the striations. 

 Spikelets broadly ellipsoid, obtuse 

 Spikelets ellipsoid-lanceolate 

 Nut not longitudinally striate 



Stem at the top subequally 4-angled or 5- 

 angled. 

 Leaves very short, rarely 1-2 in. long . 

 Leaves half the length of the stem 

 Stem at the top very much flattened 

 Spikelets, at least many of them, clustered. 



Spikelets very numerous in a compound umbel 

 or head ....... 



Spikelets 1-4 to each stem, subcapitate 

 ''=''"'^*Abildgaardia. — Lower fertile glumes distichous or nearly so ; upper fertile- 

 glumes spirally placed ; spikelets not clustered. 



13. F. tenera. 



14. F. schtveinfurthiana,. 



15. F. miliacea. 



16. F. quinquangularis . 



17. F. suhaphylla. 



18. F, scahrida. 



19. F. complanata. 



20. F. ohtusifolia. 



21. F. oligostachys. 



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