ORDER CXIJ. CYPERACE^. SCo 



§ 2. Spikes compound, androgynous, apex slaminate. 



2. C. Muhlexber'gii, (Sehkuhr.) Stem erect, an^'ular. stout, scubrouf 

 at the summit. Leaves linear, shoatliing tho stem. Spiken al>jut 5, 

 ovate, crowded at the summit of the stem. Bracleal leaves setacooiiis 

 longer than the spikes. Glumes niucronatf, lung(.-r than the paleae 

 Faleet 2-cleft at the summit. — If. May. Shady woods. 1 — '2 feet, 



3. C. sparganoi'dks, (Muhl.) Stem erect, nearly terete. Leaven nu- 

 merous, striate. Flowers in 6 — 8 sessile spikes, numerous, liractt 

 longer than the spikes. Glumes mucronate. 7'a/t'(c expandinir, serrate. 

 Fruit ovate, compressed, bifid, double the length of the glume. — U. 

 April — May. Damp soils, i — 2 feet. 



4. C. stipita'ta, (Muhl.) Stem erect, smooth, succulent. L.ravcs chan 

 neled, ligulate. Spikes numerous, compound, bracteate, with the bract? 

 longer than the spikelets. Glumes membranaceous. Palccc ovate, ser- 

 rulate. Fruit lanceolate, bidentate. — y. April — Ma}-. Wet lands. 

 1—3 feet. 



5. C. no'sEA, (Sehkuhr.) >SVe?» slender, slightly angled. Zrair* linear. 

 Spikes 4 — 6, remote, the lowest one with a setaceous bract. Fruit 

 ovate, 2-toothed, ciliate. Glumes ovate, nearly as long as the paleaj. — 

 If. May. Damp woods, 10 — 12 inches. 



6. C. reteoflex'a, (Muhl.) Stem slightly augled, slender. Lcavei 

 nearly filiform, scabrous along tlie margin. Spikes 4 — 6. Glnmc» 

 ovate, shorter than the palere. Fruit ovate-lanceolate, bitentate, as 

 long as the glumes. — If. May. Dry soils. 10 — 12 inches. 



7. C. multiflo'ra, (Muhl.) Stem scabrous, 3-angled. Leaves nar- 

 row, rigid, longer than the stem. Spike compound, ol)long; tipikelft* 

 glomerate, ovate, oblong, obtuse. Glumes lanceolate, browni.sh. Fruit 

 ovate, acuminate, compressed, 3-nerved, serrulate on the margin, di- 

 verging when mature, shorter than the glumes. — If. May. Moist 

 lands. 12 — 18 inches. 



8. C. cephaloph'ora, (Muhl.) Stem 3-aligled, scabrous along the 

 margins, leafy at the base. Leaves linear, long. Spikes collecteii into 

 an elliptical head. Glumes ovate, mucronate. }'\uit ovate, scabrons 

 on the margin. — If. .^lay — June. Oak woods. Common. 2 — 3 feet. 



§ 3. Spikes 3 — 12, androgynous, staminate lowest. 



9. C. lepori'na, (L.) Spikes 3, nearly round, elli|>tic, attenuate, eiu.-*- 

 tered, green, tinged with yellow; fruit ellii-tic, compressed, acuminate ; 

 scales ovate, acute, glabrous. — Carolina and northward, 



10. 0. scopa'ria, (Sehkuhr.) Stem obtusely angled. Leaves linenr, 

 with scabrous margins toward the summit. Spikes 6 — 8, alternate, el- 

 liptic, lowest one bracteate. Glumes ovate, membranaceous, /•Vri// 

 ovate-lanceolate, margined, smooth, bicuspidate, longer than the glume», 

 nerved, — If, May. Swamps. 1 — 2 feet. 



11. C. foe'nea, (Willd.) Stem obtusely 3-nngled, scabrous near tho 

 summit, furrowed. Spikes numerous ; the lower ones compound, the 

 upper ones aggregatecl. Paleop. serrulate, larger than the eilinto glunn-B ; 

 the lowest bract largest, subulate. — If. May — June. Marches. 1—2 

 feet. 



12. C. lagopodioi'des, (Sehkuhr.) Stan erect, obtusely 3-anKled, 

 scabrous toward the summit. Leaves sheathing the stem at tho ba*e. 



