CYPERACE^. 287 



neled. Spikes arranged in a leafy panicle, some sessile, others pc-dunculate, 

 1 ovate. Glumes njucronaie, tooihed at the summit, wiih the midrib 

 t \ • li,' into an awn. 



4 May — June, in salt water marshes. 3-4 ft. 



22 S ExALTATCs. Sinn obtusely 3-angltd. I-eaves lonff, glabrous, finely 

 serrulate. Siukes ovate, clustered, in a compound umbel. Involure many 

 leaved, loiijjor than the umbel. Inioiucel t^horl. 



Var. ViviPARUs. Stetn tall, somewhat climbing. L'lulnls viviparous, 

 bearing flowers at the base of the branches. 



% Jul) — Aug. In shady woods. 2-10 ft. 



23 S LiNEATi*s. Stem triangid.ir, leafy, glabrous. leaves lanceolate, 



t d, finely serrulate. Spikts ovale, in axillary umbels. Glumcg fer- 

 r __ -, with tl>e midrib green. 



4 June — Auy;. Pine barrens. 2-3 ft. 



24 S DrN'ARicATUs. S/cm erect, obtusely 3-angled, glabrous. Leaves flat, 

 with finely serrulate margms, glabrous. Spikesova], pendulous, in compound 

 umbels. CUumes ovate, marginswhiie, miilrib green. 



7| May — June. Fine barrens. 2-4 ft. 



25 S Schce-\o:des. Stem triangular, glabrous. * Leaves linear, short. — 

 Spikes ovcte-lanceolaie, clustered, numerous, arranged in a compound pani- 

 cle. Glumes ovate, ferruginous. 



% July — Aug. In Tow country. 2-3 ft. 



Genus V ERIOPHORUM. 



Glumes ciiafiy, imbricate in all directions. PalccB none. 

 Seed surrouiiiled by a long, dense wool. 



1 E ViRJi.vicuM. Stem erect, glabrous, terete. Ijcaves linear, keeled, 

 with the margins scabrous. Spikes clusu red, in a globose head. Involucre 

 longer tiian the head, 3-leaved, unequal. Floicers diandrous. 

 % Aug.— Sept. -1:; wet places. 3-4 It. 



Gexts VI SCHCENUS. 



Glumes numerous, collected into a spike, lower ones empty. 

 Palece none, deciduous. Seed naked. 



1 S Effuscs. Stem erect, stout, leafy, obtusely 3-angled. Leaves lon^, 

 glabrous, finely serrate. Flotceis in compound panicles, lateral or terminal, 

 diffuse. Seed ovate, wrinkled, without l)ristles or haire. 

 % August — Sept. In ponds. 6-10 ft. 



Gents VII. DICHROMENA. 



Glumes imbricate on nil sides, the lower ones without dow- 

 ers. Paiecc none. Seed naked. 



1 D Leccocephala. Stem erect triarigular, naked. Leaves linear, glab- 

 rous, concave. Flowers in compound heads. Involucre 6-leaved, white at 

 the base, the ihree exterior ones longest. Glumes membranaceous, lanceo- 

 late, white. 



% July— Oct- Damp soils. 10-12 in. 



2 D Latifoua. Stem erect, glabrous, leafy at the base, terete. I^eaves 

 osually longer than the stem, concave, with long sheaths. Flotrers in com- 

 pressed heads, compound. Involucre about 10-leaved, the exterior ones long- 

 eat tapering towards the summit, white. Glumes ovate, white. 



% Afay — June. On the margins of ponds. 10-18 in. 



