514 



CLVI. CYPERACE^ (cLARKE). 



[Co 



27. CAREX, Linn. ; Benth. et Hook. f. Gen. PI. iii. 1073. 



Spikelets unisexual, female 1 -flowered, male (at least in appearance) 

 many -flowered ; female arranged in spikes, male often solitary. Female 

 flower consisting of a pistil only, completely enclosed in a utricle (a 

 bottle-like sac), really the bract to a branch of the axis ; within this 

 utricle is sometimes a bristle as long as the utricle representing the 

 axis which the utricle subtends. Stamens 3-1 ; anthers linear-oblong. 

 Style-branches 3 or 2. Nut trigonous or flattened. — Perennial herbs ; 



leaves grass-like. 



Species 3 400, scattcreJ throughout the "World, from the Arctic Circle to the 

 Soutlieru limit? of Phapuogains ; mostly in moist places. 



-'•ViGNEA.— Styh's 2-branched. 



■\CapituliqercB. Stem with 1 spike. 



Stem triqiic-trous; beak linear, ^-\ tlie length of 

 the i^tricle ....... 



Stem subterete, striate ; beak linear, hardly \ the 

 length of the utricle ..... 



^\MuricatcB. Panicle dense, of many ovoid spikes 



female at the base, some male at the top. 



Utricle nerveless on the plane face, obscurely 2-3- 



nerved on the convex face. 



Utricle ovoid-triangular, beak triangular or hardly 



any ........ 



Utricle ellipsoid, acuminated into a lanceolate- 

 linear beak 4. C leptosaccus 



Utricle with 5-9 nerves on the convex face. 



Utricle ^ in. long, long-lanceolate, attenuate at both 



ends . . . . . . . . 5. C. Koestlini. 



Utricle ^ in. long, ovoid-lanceolate, subsessile. 



Leaves 4 in. broad ; utricle with 7 strong ribs 

 on the convex face ..... 



Leaves ^ in. broad ; utricle with 7 nerves on the 

 convex face ...... 



1. C. monostachya. 



2. C. runssoroensis. 



3. C. conferta. 



6. 



C. erythrorrhiza. 

 C. Lycurus. 



•Carex. — Styles 3-branched. 



fSpikes (many of them) female at the base, male at 



the top ; panicle long. 



Spikes ovoid or oblong, ^ in. long or less (except in 



C. Sfeudneri), numerous, usually very numerous. 



Utricle glabrous. Partial panicles oblong (or in 



C. leptocladus obscurely pyramidal). 



Beak much shorter than the body of the utricle. 



Leaves -jV-h i"- broad ; panicle thin, utricle 



Y^g i"- iong ...... 



Leaves ^ in. broad ; panicle rather copious ; 

 utricle Jq i"* ^°"g .... 



Leaves \-^ in. broad; panicle rather copious; 

 utricle ^-\ in. long .... 



Beak nearly as long as the body of the utricle. 



Panicle-branches firm ; utricle i in. long, firm 11. 

 Panicle-branches capillary; utricle ^-\ in. 

 long, delicate 



9. 



C. schimperiana. 

 C. echinochloe. 

 10. C. nyasensis. 

 C. chlorosaccus. 

 C. leptocladus. 



. 12 



