ORDER CXLI. CYPERACE^E. 569 



pedunculate, with ferruginous, ovate glumes; fertile spikes 3 — 4, cylin- 

 drical, on short peduncles, becoming pendulous ; scales ovate, emargi 

 nate, mucronate. Paleai ovate, glaucous. Fruit 3-angled. — %. April 

 — May. Around ponds. 1 — 2 feet. 



41. C. bulla'ta, (Schk.) Stem slender, acutely 3-angled. Leaves 

 narrow, with scabrous margins. Sterile spikes 3, slender ; fertile spikes 

 2, erect, on short peduncles. Glumes lanceolate, acute. Pa/ece ovate, 

 with pubescent nerves. Fruit ovate, beaked, 3-angled. — If. April. 

 In ditches. 2 feet. 



42. C. rostra'ta, (Mueh.) (C. tentaculata, Ell.) Stem 3-angled. 

 Leaves long, linear-lanceolate, nerved. Sterile spike solitary, cylindri- 

 cal ; fertile spikes 3, sessile, horizontal, with long bracts. Glumes mu- 

 cronate. Palece ovate, beaked. Fruit ovate, nerved, with a long beak. 

 — U. May — June Wet places. 12 — 18 inches. 



43. C. hysterici'na, (Mueh.) Stem 5-angled, with the angles scabrous. 

 Leaves narrow, long, scabrous. Sterile spikes cylindrical, with ovate- 

 lanceolate glumes; fertile spikes 3 — 4, thick, the lower ones on exsert- 

 ed peduncles. Paleai ovate, with a long 2-cleft beak. Glume ovate, 

 terminated by a hispid setaceous bristle. Bracts long. Fruit ovate, 

 nerved, beaked. — %. April — May. Wet soils 1 — 2 feet. 



44. C. lupuli'na, (Mueh.) Stem erect, glabrous, leafy, thick, 3-angled. 

 Leaves linear-lanceolate, with scabrous margins. Sterile spike on a short 

 peduncle; fertile ones 3, irect, with long, leafy bracts. Glume with a 

 hispid point. Paleai 2-beaked, longer than the glume. Fruit ovate, 

 nerved, with 2 long beaks. — %. April — May. Swamps. 2 — 3 feet. 



45. C. follicula'ta, (L.) Stem, erect, 3-angled. Leaves ligulate, sca- 

 b.-ous. Sterile spike solitary, terminal, with acute, lanceolate glumes, 

 fertile spikes usually 4, erect, on short peduncles. Palece. ovale, beak 

 ed, inflated. Fruit ovate, beaked. — %. June. Swamps. 12 — 18 in. 



46 C. Elliott'ii, (Torrey.) (C. castanea, Ell.) Stem 3-angled, slen- 

 der, purple at the base. Leaves linear, shorter than the stem. Sterile 

 spikes shorter than the bract. Glumes brown, with white margins. 

 Fertile spikes 3, nearly round, the lowest one on a long peduncle. 

 Palece inflated, with a long beak, shining. Fruit 3-angled. — %. April. 

 Wet pine-barrens. 1 — 2 feet. 



47. C. gigan'tea, (Rudgr.) Stem erect, 3-angled, glabrous. Leaves ligu- 

 late, slightly channeled. Sterile spike terminal, with acute, ovate glumes ; 

 fertile spikes 3. Palece ovate, nerved. Fruit 3-angled. — 2±. April — 

 May. In bogs. Common. 1 — 2 feet. 



§ 6. Staminate spikes solitary ; pistillate 2 — 3 — 5. 



48. C. vesti'ta, (Schk.) Stem acutely 3-angled. Leaves narrow, lig- 

 ulate. Sterile spike mostly solitary, terminal; fertile spikes generally 



2, sessile, sometimes sterile at the summit. Glumes brown, with white 

 margins. Paleai pubescent. Fruit ovate, nerved, pubescent, with a 

 short beak. — %. May — June. Wet soils. 1 — 2 feet. 



49. C. Pseudo-Cype'rus, (L.) Stem erect, acutely 3-angled, scabrous 

 along the angles, stout. Leaves channeled, with scabrous margins. 

 Sterile spike long, slender, with linear-lanceolate glumes ; fertile spikes 



3, pendulous. Bracts long, scabrous, nerved. Paleai ovate, beaked, SB- 

 cleft at the summit. Glume small, with a subulate point. Fruit ob- 

 long-lanceolate, beaked, many-nerved, with the apex bifid. — If. June. 

 In swamps. 2 feet. 



