MACLOSKIE : CYPERACE^C. 275 



Culm obtusely triquetrous. Leaves subterete, thick. Spike oblong, male part conspicuous. 



Scales ovate-lanceolate, acute. C. melanocystis Desv. 



26. Utricles coriaceous, margined, not winged. 27. 

 Utricles membranaceous. Wings crass at margins. 30. 



27. Spikes compound. Rostrum rough, more or less incurved. C. marcida Bt. 

 Utricle dorsally convex. Rostrum straight. 28. 



28. Utricle small, 2 mm. high, spongy. Spikes often unisexual. (18) C. gayana Dsv. 

 Utricle longer, thicker. Spike androgynous. 29. 



29. Culm rough above. Spikes compound. Utricle not stiped. C. ntacrorrhiza Bt. 

 Culm smooth ; spikes simple. Utricle stiped. C. hypoleucos Dsv. 



30 (from 26). Culm compressed-trigonal, rough upwards. Utricle 4 mm., ovate, attenuate- 



stipitate, 2 -toothed, with long rostrum. C. pycnostachya Dsv. 



Culm thick, smooth. Utricle 3 mm., glabrous, ovoid, winged, stiped. (24) C. kurtziana Kuk. 



3 1 . Spikes long-pediceled. 



(From 16.) Spike of few, simple, rarely compound, spikelets. 32. 



Spikes 10-12, upper 4 male, lower ones long-stalked. Stigmas 2. Rostrum 2-toothed. 



Bracts exceeding culm. (20) C. incompta. 



Spike paniculate, of many spikelets. 35. 



32. Lateral spikelets subbasilar. Utricle pyriform. Stigmas 3. 33. 

 Lateral spikelets subterminal. Utricles plano-convex. Stigmas 3. 34. 



33. Rhizome laxly cespitose. Spike clavate. Scales whitish. C. phalaroides Kuk. 

 Rhizome densely cespitose. Spikes scarcely cespitose. Scales pubescent. C. macella Kth. 



34. Spikes slender, laxiflorous. Utricles elliptical, not as long as the scales. 



C. pifhichensis Hum. 

 Spikes crass, densiflorous. Utricles broad-ovate, equalling the scales. 



C. brunnescens Bck. 



3 5 (from 31). Panicles divaricate. Utricle green, red-spotted. Stigmas 2. C. seditiosa Steud. 

 Panicle contracted. 36. 



36. Secondary panicles interrupted. Utricle 3.5 mm., planoconvex. Stigmas 2. 



C. catantarcensis Clk. 

 Secondary panicles contiguous. Utricles 2.5 mm., trigonal -globose. Stigmas 3. 



C. latibracteolata Kiik. 



37. Spikes sexually distinct. 



(From 12.) Terminal spike basally male; laterals only female. Stigmas 3. 



C. bolhiensis var. H. & M. 



Spikes 3, short, males at base and sometimes at apex, the lower stalked and bracted. 



Utricle compressed. (16) C.fuegiana. 



Terminal spikelet typically male ; laterals female. 38. 



38. Utricles entire or brevirostrate. 39. 

 Conspicuously rostrate and 2-toothed. 45. 



39. Stigmas 2. 40. 

 Stigmas 3. 43. 



40. Leaves narrow-involute. Basal sheaths leafy. Spikes subsessile, single. Scales obtuse. 41. 

 Sheaths leafless. Leaves broad, plane, revolute. Spikes long-stalked, in 2's and 3's. 



Scales acutish. 42. 



