GENERA AND SPECIES. 
Cyperus. 
1. Spikelets flat with navicular keeled bracts ; 
Sruit biangular, stigmas 2. 
Spikelets few in a loose cluster ; stamens 2 
11. Spikelets flat ; rhachis not winged ; stigmas 3, 
fruit triangular. 
Spikelets spreading, pale-coloured, in a single sessile 
cluster ; bracts obtuse. 
Dwarf annual; spikelets 1 or 2, one long involu- 
cral bract ; stamens | or 2... 
Slender perennial; spikelets 1 or few, involucral 
bracts 1 to 3; stamens 3; bracts greenish, 3- to 
4-nerved ah f 
Dwarf annual, spikelets numerous, involucral 
bracts 2 or 3 with a broad base, stamen 1] 
Spikelets numerous, capitate or in an umbel of few rays. 
Bracts with a prominent straight or recurved point 
Spikelets dark-coloured in dense globose heads 
Spikelets pale or brown, capitate, or solitary on the 
rays of an umbel. 
Involucral bracts few unequal 
Involucral bracts 6, rigid, nearly equal 
Spikelets pale- or dark-brown, clustered on the rays of 
of an umbel. 
Spikelets small, few-flowered, in little globular 
clusters sn get oad Fok Sue 
Spikelets linear ; bracts tipped with fine points ... 
Spikelets rather thick; bracts obtuse, or scarcely 
acute. 
Stems obtusely triangular ; spikelets 8- to 12- 
flowered, linear-lanceolate, very spreading, 
of a golden-brown; bracts 2- or 3-nerved ... 
Stems acutely triangular ; spikelets 10- to 30- 
flowered, linear, pale-brown; bracts 3- to 4- 
nerved. Involucral bracts rough 
Spikelets pale-brown or yellowish-green, numerous in 
loose spikes along the rays of a simple or com- 
pound umbel ; bracts very obtuse 
1. Spikelets flat or rownd, rhachis winged ; 
stigmas 3; nut triangular. 
Spikelets clustered in short spikes or umbels; nut not 
half the length of the bract. 
Stems leafless ; bracts keeled, several-nerved 
181 
Eragrostis 
tenellus 
gracilis 
pygmaeus 
squarrosus 
difformis 
trinervis 
vaginatus 
holoschoenus 
Gilesii 
fuluvus 
alternifiorus 
lria 
diphyllus 
