312 



CLVI. CYPERACE^ (cLARKE). 



\Cype,r 



Spikelets 1-5 in each spike. 



Spikelets lanceolate, ciiestnut to black , . . 31. C. phceorhizus. 



Spikelets parallel-sided, yellowish-green or reddish. 



Bracts usually shorter tlian the umbel . . 32. C. Haspan. 



Braces longer than the umbel .... 33. C.fiavidus. 



§ vil. PrLCMR;E. — Leafy. Rhizome woody. Spikes urabelled. Glumes rigid, 

 shining. 



Style long ; branches much shorter than the undivided 



part 38. C. apricus. 



Style short; branches mudh longer than the un- 

 divided part. 

 Spikes 2-1 ; leaves green, weak .... 39. C. Adansoni, 



Spikes numerous; leaves nirrow, tough. 



Style (including its branches) hardly longer than 

 the nut. 

 Nut much flattened on the anterior angle . 34. C. podocarpus. 

 Nut subequally trigonous .... 36. C. Hensii. 



Style branches much longer than the minute 

 nut. 

 Rhizome hardly any. 



Spikelets 1—^ in. long; glumes closely packed 35. C.tenax. 

 Spikelets 1 in. long; glumes rather loosely 



packed ...... 37. C. Boehmii. 



Rhizome 2 in. long, horizontal, woody, nodose 40, C. spliczrospermus. 



§viii. Textiles. — Leafless. Rhizome woody. Umbel with 

 Primary rays of umbel subequal, often very numerous. 

 Bracts numerous, much longer than the umbel, 

 rather broad. 

 Stems terete, or under the umbel scarcely 

 trigonous. 

 Primary rays of umbel rather thick 

 Primary rays of umbel very slender 

 Stems 6-anguiar under the umbel 

 Braces much shorter than the umbel. 



Stems terete ....... 



Stems triquetrous ...... 



Primary rays of umbel unequal, rarely more than 

 15 ; bracts not very conspicuous. 

 Stem acutely triquetrous under the umbel. 



Spikelets pale to reddish-brown ; glumes yellow 

 on the keel ...... 



Spikelets shining black ; glumes 1-coioured 

 Stem under the umbel round or obscurely 

 trigonous ....... 



§ ix. DiFFUSJE. — None annual 

 not rolled up in the dried state. 



Umbel congested into 1 head ; spikelets pallid 



Glumes remote, hardly imbricated in fruit . . 49. 



41. 

 42, 

 43. 



47. 

 48. 



44. 



45. 



46. 



numerous spikes. 



C. flahelliformis. 

 C. aUernif'olius. 

 C. sexartgtdaris. 



C. proHfer. 

 C. isocladus. 



C. denv.datus. 



C. luce ntinigrica lis. 



C. marginatus. 

 Leaves green, usually long, flat, 3-nerved, grassy j 



Glurnes close-packed, even in ripe fruit . . 50. 



Umbel simple, with very long flexuose rays . . 51. 



Umbel compound with numerous spikesj depauperated 

 examples rarely occur. 



C. dicJi/'omencB- 



f or mis. 

 C. mapanioides. 

 C. fertilis. 



