1	"Flowers unisexual; pistillate flowers enclosed by a sac-like structure (utricle)"	Carex
1	"Flowers bisexual; pistillate flowers not enclosed by a utricle"	2
2	"Flowers with perianth segments"	3
2	"Flowers without perianth segments"	7
3	"Inflorescences composed of a solitary spike or spikes"	4
3	"Inflorescences composed of 2-many spikes"	5
4	"Inflorescences with an erect stem-like bract looking like a continuation of the stem"	Schoenoplectus
4	"Inflorescence bracts scale-like"	Eleocharis
5	"Spikelets with 1-5 flowers"	Schoenus
5	"Spikelets with many flowers"	6
6	"Leaf blades and leaf sheaths hairy, at least on the leaf tips and near the throat of the sheaths"	Fuirena
6	"Leaf blades and leaf sheaths glabrous or scabrous or leaf blades lacking"	Schoenoplectus
7	"Spikelets distichous, often flattened"	Cyperus
7	"Spikelets spirally arranged or in 5 rows, rarely flattened"	8
8	"Inflorescences composed of a solitary spike or spikelet"	9
8	"Inflorescences composed of 2-many spikelets at least on some stems"	10
9	"Leaf blades absent or reduced, short and triangular"	Eleocharis
9	"Leaf blades conspicuous, often filiform"	Bulbostylis
10	"Spikes with 3 or more empty bracts at the base"	Schoenus
10	"Spikes with (0-)1-2 bracts at the base"	11
11	"Inflorescences panculate; leaves usually hairy"	Fuirena
11	"Inflorescences open or crowded, clustered, often globose"	12
12	"Inflorescences appearing lateral, the major inflorescence bract erect and stemlik"	Schoenoplectus
12	"Inflorescences appearing terminal, the major inflorescence bract leafy or filiform, erect or spreading, not stem-like"	13
13	"Style bases persistent on the nutlets, forming a nob"	Bulbostylis
13	"Style bases not persistent"	14
14	"Leaves flat, often glabrous; sheaths without long hairs at the throat"	Fimbristylis
14	"Leaves setaceous or narrowly canaliculate, often hairy; sheaths with long hairs at the throat"	Bulbostylis