Cypevm.] GUI. CYPEEACE^. 1731 



Spikelets shortly spioate or clustered on the rays of a simple or compound 

 umlel. Nut not exceeding half the length of the glume 

 (Corymbosl.) 

 Stems leafle-s or the sheaths bearing a very short lamina. 



Glumes keeled. Nut equally triquetrous. Stems continuous . , .40. C. corymbosus. 

 Stems leafy at the base. 



Spikelets rather fiat, usually acute, shortly and rather loosely spicate 



or clustered , . 41. C rotundus. 



Spikelets 4 to 11 in the clusters, linear compressed, 10 to 16- flowered 42. C. tenuiflorus. 

 Spikelets linear, compressed. Stems 3-angled . . . . ' . . . . 43. C. liicidulus. 

 Spikelets slightly flattened, in very dense short spikes or clusters. 



Stems acutely Sangled. Leaves rather broad with long points . . 44. G. eongestus. 

 Spikelets very narrow, scarcely flattened, in dense clusters. Stems 



obtusely triquetrous. Leaves very narrow ■. . 45. C subulatus. 



Spikelets clustered or shortly spicate on the rays of a simple or compound 

 umbel. Nut usually nearly as long ae the glume (Iiucidi.) 

 Spikelets small, 5 to 8-flowered, in little globular clusters. Stems 



obtusely triquetrous 46. C sporoboliis. 



Spikelets linear, scarcely flattened, 10 to 20-flowered, in close clusters 

 or heads. 

 Stems obtusely triquetrous. Spikelets usually few in the heads . . 47. G. angmtatue. 

 Stems stout, acutely 3-angled. Spikelets numerous in the heads . . 48. Nova HoUandite. 

 Spikelets flat, of a rich brown. 



Spikelets in globular clusters or heads, usually 8 to 12-flowered . . 49. G. Gtinnii, 



Spikelets distinctly spicate, mostly 5 to 8-flowered 50. C lucidus. 



Spikelets in lengthened spikes along the rays of a compound or rarely 

 simple umbel. 

 Spikelets flat. Glumes loosely imbricate. Nut more than half the 

 length of the glume. 

 Spikelets pale-coloured, 10 to 16-flowered, the rhaohis scarcely 



winged 38. 0. eleusinoides. 



I ■ Spikelets of a rich-brown, 3 to Sflowered, the rhachis distinctly 



winged 50. C. lucidus. 



Spikelets flat. Glumes closely imbricate. Nut less than half the 

 length of the glume (Exaltati.) 

 Spikelets thick, 1 J to 2 lines broad, pale-coloured, 4 to 8-flowered. . 51. C. pennatus. 

 Spikelets very flat, under 1 line broad, usually rich brown, 10 to 



20-flowered , 52. C. cxaltatus. 



Spikelets narrow, linear-terete, 10 to 20-flowered, loosely spicate, 

 mostly under Jin. Glumes obscurely 3-nerved. Nut less than halt 

 the length of the glume 53. C digitatus. 



Sect. V. Diclidium. — Spikelets narrow, terete or nearly so, often Aexuose, sometimes 

 1-flvwered, the rhachis bordered by hyaline wings embracing the nuts. Fowering glumes distant, 

 narrow, closely oppressed to the rliachis. Style 3-cleft, Nuts triquetrous. 



Spikelets rather rigid, with 6 or more flowers, in elongated spikes in a 



large compound umbel 54. C ferax. 



Spikelets bearing 10 to 18-flowers 55. C escu'entus. 



Spikelets almost subulate, with 6 or more flowers, in short close spikes 



in an umbel of few rays 56. (7. Bowmanii. 



Spikelets filiform, 3 or 4-flowered, in loose spikes in a large compound 



umbel 37. C. trichostachys. 



Spikelets mostly 2 or 3-flowered, in ovoid globular spikes in a simple 



umbel of few rays. Stems smooth 58. 0. leiocaulon. 



Spikelets 1 or 2-flowered, in ovoid or cylindrical spikes in a compound 



umbel of many rays. Stems scabrous 59. C scaber. 



Sect. VI. DXariscus. — Spikelets small, numerous, terete or scarcely flattened, 1 or 2- 

 Jiowered, the short enclosed rhachis bordered by hyaline wings. Flowering glumes imbricate when 

 more than one. Style 3-cleft. Nut triqueti'ous. 



Spikelets usually with 2 perfect flowers, in small globular clus^p in a 



compound tmbel of many rays 60. C decompositus. 



Spikelets with 1 or rarely 2 perfect flowers, in loose cylindrical spikes 



in a compound umbel '. 61. C Armstrongii. 



Spikelets usually with 1 perfect flower, in dense cylindrical spikes either 



sessile or pedunculate in a simple umbel 62. C umbellatus. 



Spikelets usually with l.perfeet flower, in dense ovoid or 3-lobed heads 



in a simple umbel 63. C. conicus. 



