378 CLvi. CYPERACEiE (clarke). [Mariscus, 



Hairy. Spikes cinnamon-straw-coloured . 11. M. pilosulus. 

 ||Infloiescence umbellate. 



Whole plant including the glumes minutely 



pubescent . . . . . . . 13. Jf. psilostachys. 



Whole plant glabrous. 



Leaves ^-\ in. broad ..... 12. M. Taylori. 



Leaves ^ in. broad or less. 



Glumes mucronate . . . . . 15. illf. vestitus. 



Glumes muticous, hardly acute. 



Spikelets compressed, leaves much wither- 

 ing ...... 14. M. leptophyllus. 



Spikelets exactly linear-cylindric . . 16. M. concinnns. 



■f jSpikelets i-ipening only 1 nut. (Cfr. also M. remotus.) 

 Inflorescence in 1 head. 



Spikes 3-1, congested. Nut broadly obovoid. 



Spikelets and glumes scarcely acute . . 17. M. bulhocaulis. 



Spikelets and glumes acute, i-ather larger . 18. M. plateilema. 

 Spike 1 (apparently). Nut linear-oblong. 



Bracts suberect, much dilated at the base . 19. M. circumclusus. 

 Bracts divaricate or deflexed, scarcely dilated 

 at the base. 

 Basal leaf -sheaths torn into much soft fibre 20. M. mollipes. 

 Basal leaf -sheaths hardly at all fimbriate . 21. M. globifer. 

 Inflorescence a simple umbel. Leaves with scarious 



mai'gins in their lower half . . . 22. M. albomarginatv^. 



■''■•'• Eu-Mabiscus. — Base of the stem not much thickened, but covered by sheaths, 

 foliaceous in texture, neither scarious nor marcescent. 



I Umbellati. — Spikelets green or reddish, ultimately pallid, maturing 1-2 (rarely 3) 

 nuts. Nut-bearing glumes approxiujate, suberect, wrapped round the nut (except in 

 M. decidims). Lowest empty glume lanceolate or mucronate, hardly long-setaceous 

 (except in M.flavus). Nut often f (rarely only ^) the length of the glume. 

 Stem, with upper parts of the bracts, densely and 



shortly white hairy . . . . . . 37. ilSf. albopilostts. 



Stem, and whole plant, glabrous. 



Glumes, even before the nut is ripe, spreading, hardly 



imbricate ....... 36. M. decidims. 



Glumes sulDerect, adpressed, margins often enclosing 

 the rhachilla. 

 Spikes deep chestnut-red, in one head . . . 32. M. Kerstenii. 



Spikes lurid or blacki«h-green, in one head . . 35. M. Soyanxii. 



Spikes from green or wliite to sttaw-colour or 

 yellowish or brown, mostly umbelled. (These 

 ten species might be treated as nine varieties 

 of M. sieherianus.) 

 Lowest empty glume reduced to a bristle from a 



lanceolate base ..... 34. M.Jiavus. 



Lowest empty glume lanceolate, or mucronate, 

 not long-setaceous. 

 Spikelets often with 1 (or 1-2) nuts (except 

 in M. sieberianus, var.). 

 Spikelets very slender, often all deflexed in 



fruit . . . . .24. M. nmbellatus. 



Spikelets thicker, rarely deflexed in fruit. 

 Spikelets acute. 



