Cyperus. | CLVI. CYPERACE& (CLARKE). 3 
Bracts much longer than the umbel, 3-nerved. 
Spikelets linear-oblong or linear; with (usually) 
more than 6 nuts. 
Spikelets in fruit green; nut nearly as long 
as the glume : . 57. C. diffusus. 
Spikelets in fruit reddish or brow nish (8 
species very closely allied). 
Spikelets 54,2 in. wide. 
Glumes closely packed, hardly mucronate. 
Nut ovoid. 
Spikelets compressed ; glumes rather 
rigid. : : 3 . 52. C. Manni. 
Spikelets turgid ; siecle soft . 54. C. fischerianus. 
Nut oblong : . 58. C. Deckenii. 
Glumes in fruit hardly ov erlapping, with 
a small mucro. 
Bracts 3 in. wide. c : . 55. C. derreilema. 
ice a in. wide . : : . 56. C, Ajax. 
Spikelets 7,—;1; in. wide. 
Spikelets short-oblong ; umbel rigid . 59. C. Baroni. 
Spikelets ier ee umbel flexuose. 
Leaves + 2 ue broad. ‘ c . 58. C. glaucophylius. 
Leaves 3-3 in, broad : . 60. C. zambesiensis. 
Spikelets short oblong, with (usually) 3—4 nuts . 61. C. Renschit. 
Bracts not (or scarcely) overtopping the umbel, 
I-nerved 2 F ‘ : z . 62. C. aureobruneus. 
B. Choristachys.—Spikelets spicate. 
a. SUBEXALATE.—Rhachilla not or scarcely winged, Leaves and bracts long, 
except in 72, C. socialis, 
§x. CoMPREss#.—Annuals; but sometimes persisting and flowering the second 
year. 
Nut nearly as long as the glume. : : . 63. C. Iria. 
Nut 3-2 the length of the glume. 
Glames obtuse, scarcely apiculate. 
Spikelets tort i in. broad : : . . 64. C. sphacelatus. 
Spikelets 2-1 in. broad. 5 - : . 66. C. incompressus. 
Glumes ete, ierene or aristate. 
Spikelets 4-1 in. broad . : . . 65. C. compressus. 
Spikelets 1-2 in. broad . : : : . 67. C. aristatus. 
§xi. Not annuals. Elongate stolons produced by most species. 
Leaves 0 : é : : : . 72. C. socialis. 
Leaves long. 
Rhachis of the spikes minutely hairy . . . 73. C, pilosus. 
Rhachis of the spikes glabrous. ; 
Glumes with an excurrent mucro_. : . 70. C. eleusinoides, 
Glumes muticous or scarcely apiculate. 
Glumes in fruit overlapping . 
Glumes in fruit overlapping but little. 
Spikelets in fruit acicular, divaricate . . 68. C. distans. 
Spikelets in fruit linear, suberect : . 69. C. nutans. 
Stems approximate on a nodose woody rhizome. Spikelets hard with rigid 
Gace : a ‘ 5 A z = . 74, C. pratensis. 
. 71. C. latifolius. 
