312 CLVI. CYPERACEE (CLARKE). [ Cyperus. 
Spikelets 1-5 in each spike. : 
Spikelets lanceolate, chestnut to black , < . 31. C. phaorhizus. 
Spikelets parallel-sided, yellowish-green or reddish. 
Bracts usually shorter than the umbel é . 32. C. Haspan. 
Bracts longer than the umbel . : : . 33. C. flavidus. 
§vii. PuLcHR#.—Leafy. Rhizome woody. Spikes umbelled. Glumes rigid, 
shining. 
Stylelong; branches much shorter than the undivided 
part : 5 : A : : : . 38. C. apricus. 
Style short; branches much longer than the un- 
divided part. : : 
Spikes 2-1 ; leaves green, weak . : : . 39. C. Adansont. 
Spikes numerous ; leaves narrow, 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. Hensit. 
Style branches much longer than the minute 
nut. 
Rhizome hardly any. 
Spikelets 1—3 in. long; glumes closely packed 35. C. tenax. 
Spikelets 1 in. long; glumes rather loosely 
packed . 3 ; : . 87. C. Boehmit. 
Rhizome 2 in. long, horizontal, woody, nodose 40. C. spherospermus. 
§ viii. TExXTILES.—Leafless. Rhizome woody. Umbel with numerous spikes. 
Primary rays of umbel subequal, often very numerous. 
Bracts numerous, much longer than the umbel, 
rather bro:d. ‘ 
Stems terete, or under the umbel scarcely 
trigonous. 
Primary rays of umbel rather thick . 41. C. flabelliformis. 
Primary rays of umbel very slender . 42. C. alternifolius. 
Stems 6-angular under the umbel_. . . 43. C. sexangularis. 
Bracts much shorter than the umbel. 
Stems terete . : : . ; : . 47. C. prolifer. 
Stems triquetrous . : 48. C. isocladus. 
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 : Z : ‘ F . 44. €C. denudatus. 
Spikelets shining black ; glumes 1-coloured . 45. C. lucentiargricans. 
Stem under the umbel round or obscurely 
trigonous , . . : . 3 . 46. C. marginatus. 
§ix. Dirrus#.—None annual, Leaves green, usually long, flat, 3-nerved, grassy, 
not rolled up in the dried state. 
Umbel congested into 1 head ; spikelets pallid 
Glumes remote, hardly imbricated in fruit. . 49. C. dichromene- | 
forms. 
Glumes close-packed, even in ripe fruit « . 50. C. mapaniordes. 
Umbel simple, with very long flexuose rays . 51. C. fertilis. 
Umbel compound with numerous spikes; depauperated 
examples rarely occur. 
