Cyperus

D. E. Viney, An illustrated flora of North Cyprus 2. 1996R. D. Meikle, Flora of Cyprus 2. 1985
but modified and names used differing
1Nut lenticular with the narrow edge against the rhachilla; spikelets much compressed; stigmas 2
1'Nut trigonous or rounded (occasionally flattened with a wide face against the rhachilla); spikelets more or less elliptical in section; stigmas (2-)3
2Inflorescence a head of spikelets without rays
2'Inflorescence spreading, anthelate, with short to long rays
3Head obviously terminal, up to 6 cm wide; far-creeping sand-dune plant
3'Head apparently lateral, flanked by an erect bract
4Bracts 2-3, leaf-like; leaves well developed, flat; nut dark, trigonous
4'Bracts apparently solitary, terete and culm-like; leaf-blades reduced to an apiculus or when developed, thick, crescentiform or triangular; nut pale, compressed
5Plants with thick far-creeping rhizomes
5'Plants with thin, or short, rhizomes, or rhizomes absent
6Rays few, not more than 5 cm long; slender, montane plants
6'Rays numerous, 8-12(-20) cm long; tall, lowland plants
73-6 bracts below inflorescence
7'8 or more bracts in a condensed spiral below inflorescence
8Spikelets not more than 5 mm long, in small round, dense spikes
8'Spikelets 7-40 mm long
9Plant densely caespitose, without elongated rhizomes; glumes regularly and closely imbricate
9'Plant not densely caespitose, with slender tube-bearing rhizomes; glumes loosely imbricate