564 ORDER CXLI. CYPERACE^E. 



2. S. nit'ida, (Willd.) Culm 3-angled, angles membranaceous. Leave* 

 narrow, rigid, scabrous ; limb ovate, rigid. Peduncles axillary and ter- 

 minal, few-spiked ; spikes long ; perfect and staminate spikes intermix- 

 ed. Stamens 3. — North Carolina. 



3. S. cilia'ta, (Mich.) Stem erect, glabrous, generally 1-leaved. Leaf 

 pubescent on the upper surface, linear, channeled. Spikes in terminal 

 clusters. Glumes ciliate, ovate, ferruginous. Seed rough. — 2T.. May 

 — June. Damp soils. 1 — 2 feet. 



4. S. interrup'ta, (Rich.) Stern erect, 3-angled, pubescent. Leaves 

 pubescent. Spikes clustered, alternate. Glumes bristly. Seed globose, 

 mucronate, transversely wrinkled. — If. July — Aug. Damp soils. 

 12 — 15 inches. 



5. S. vertictlla'ta, (Muhl.) Stem slender, glabrous, 3-angled. 

 Leaves glabrous, filiform. Floxoers in clustered spikes. Glumes ovate, 

 acuminate. Seed globose, mucronate, transversely wrinkled. — %. July 

 — Aug. Damp soils. 10 — 15 inches. 



6. S. Carolinia'na, (Willd.) (S. hirtella, Mich.) Stem erect, trian- 

 gular, pubescent. Leaves narrow, pubescent, channeled. Spikes axil- 

 lary or terminal. Bracts hairy, ciliate. Glumes pubescent, unequal. 

 Seed wrinkled. — If. Through the summer. Damp soils. 12 — 18 in. 



7. S. triglomera'ta, (Mich.) (Cladiitm triglomeratum, Nees.) Stem 

 triangular, striate, scabrous. Leaves linear-lanceolate, somewhat hairy. 

 Flowers in terminal and lateral spikes, clustered, pendulous. Glumes 

 ciliate, mucronate. Fertile florets 2 — 3 in each spike. Seed smooth. 

 — 2£. Through the summer. In dry or moist soils. Common. 1 — 2 ft. 



8. S. gra'cilis, (Ell.) Stem filiform, 3-angled, glabrous. Leaves lin 

 ear, glabrous, narrow. Spikes 2 — 3 at the summit of the stem, each 

 bearing a fertile floret. Glumes ferruginous, mucronate. Seed white, 

 smooth. — % . May — June. Southern Geo. 10 — 12 inches. 



Tribe V.— CARI'CEtE. 



Flowers monoecious or dioecious ; achenium inclosed in a sac, 

 lenticular or triangular. 



Genus XIV.— CA'REX. L. 19—3. 

 (From careri, to want; the upper spikes destitute of seeds.) 



Flowers monoecious, rarely dioecious ; imbricate, amenta- 

 ceous. Glume 1, 1-flowered. Palese of the sterile florets none; 

 of the fertile ones ventricose, persistent, inclosing the nut. 



I. STYLE BIFID. 



§ 1. Spikelets numerous, collected into a spike, staminate and pistillate^ 

 and androgynous, often intermixed. 



1. C. bromoi'des, (Schkuhr.) Stem 3-angled, scabrous along the mar- 

 gins, slender. Leaves linear, slightly scabrous. Flowers in numerous 

 linear spikes, the spikes alternate, erect. Glumes lanceolate, mucronate. 

 Paleoz ovate. Fruit scabrous, bifid, longer than the glume. — If. April. 

 Damp soils. 12 — 18 inches. 



