Family CYPERACEA# 27 
Perianth of bristles or wanting; not of scales. 
Scales of the spikelets spirally imbricated. 
Base of style persisting as a tubercle on the achene. 
Spikelets solitary; stems without leaves. 3. Eleocharis. 
Spikelets in a terminal umbel. 4. Stenophyllus. 
Base of the style not persistent as a tubercle on the achene. 
Style swollen at the base; perianth none. 5. Fimbristylis. 
Style not swollen at the base; perianth usually present. 
Bristles, if present, not long and hairlike. 6. Scirpus. 
Bristles numerous, long, hair-like. 7. Eriophorum. 
Seales of spikelets in 2 ranks. 
Inflorescence axillary; perianth of bristles. 8. Dulichium. 
Inflorescence terminal; perianth wanting. 9. Cyperus. 
Flowers monecious or dicecious; achene in a perigynium. 10. Carex. 
1. Fuirena. 182. 
1. Fuirena simplex Vahl. 
In wet soil, mostly along streams. Kearney; Minden. 
2. Hemicarpha. 183. 
Scales brown, with short spreading or recurved tips. 
1. H. micrantha. 
Seales pale with squarrose awns equal to their own length. 
la. H. micrantha aristulata. 
1. Hemicarpha micrantha (Vahl.) Pax. 
In moist soil over most of the state; frequent on sand-bars. Atkin- 
son; Cherry county; Ewing; Fremont; Long Pine; Minden. 
la. Hemicarpha micrantha var. aristulata Coville. 
Long Pine. 
3. Eleocharis. 167. 
Spike-rushes. 
Achenes lenticular; style branches usually 2. 
Annuals without rootstocks. 
Bristles much longer than the achene. 1. E. obtusa. 
Bristles about as long as the achene. 2. E. engelmanni. 
Bristles rudimentary or wanting. 2a. E. engelmanni detonsa. 
’ Perennials with horizontal rootstocks. 
Culm stout; spikelet 6-25 mm. long. 3. E. palustris. 
Culm slender to filiform; spikelet 4-10 mm. long. 
, 3 3a. E. pal. glaucescens. 
Achenes triangular; style branches 3. 
Spikelets flattened, 3-9 flowered; rootstock filiform. 
4. E. acicularis. 
Spikelets terete, many-flowered; rootstock stout. 5. E. acuminata. 
1. Eleocharis obtusa (Willd.) Schultes. 
In wet places in the eastern part of the state. Lincoln; Minden; 
Nebraska City; Nemaha. 
2. Eleocharis engelmanni Steud. 
Minden. 
2a. Eleocharis engelmanni var. detonsa Gray. 
Sprineview. 
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