558 ORDER CXLI. CTPERACE^:. 



2. K. pi/mila, (Mich.) Stem erect, triquetrous, glabrous. Leaves 

 subulate, expanding- ; involucre usually 3-leaved, unequal. Flowers in 

 a terminal, nearly globose head. Glumes none. Palece 2, compressed. 

 Flowers diandrous. — 2f . August — Dec. Damp soils. Very common. 

 3 — 6 inches. 



3. K. macula'ta, (Mich.) (Lipocarpha maculata, Kunth.) Stem tri- 

 quetrous, glabrous. Leaves subulate. Flowers usually in 3 heads. 

 Glume 1, lanceolate, cuneate. Paleoe 2, unequal, the exterior one short- 

 est. Flowers monandrous. — If. August — Oct. 3 — 5 inches. 



Tribe IL— SCIR'PE^E. 



Flowers perfect. Spikes many-flowered. Perianth of bris- 

 tles, hairs or none. 



Genus IV.— ELEOCH'ARIS. Br. 3—1. 

 (From helos, a marsh, and chairo, to delight.) 



Spikes many-flowered. Scales imbricate, some of the lowest 

 not flower-bearing. Calyx usually 6 bristles. Stamens 3. 

 Style trifid, dilated at the base. Culm sheathed, leafless, 1- 

 spiked. 



1. E. acicula'ris. {Scirpus trichodes, Ell.) Stem setaceous, glabrous. 

 Spikes ovate-lanceolate. Glumes ovate-lanceolate, nearly white. Seed 

 3-angled, ribbed. — %. June — July. Low country. 6 — 8 inches. 



2. E. sim'plex, (Dietr.) {Scirpus simplex, Ell.) Stem erect, glabrous, 

 with a sheath at the base. Spike ovate. Glumes obtuse, nearly white. 

 — 2f . Through the summer. Wet places. 8 — 13 inches. 



3. E. tor'tilis, (Schult.) Culm cespitose, filiform, triangular ; in dry- 

 ing, twists spirally. Scales ovate, obtuse, 1 -nerved ; keel green. Setce 

 6. — Geo. and Car. 



4. E. tuberculo'sa, (Br.) (Scirpus tuberculosa, Mich.) Stem erect, 

 columnar, sheathed at the base. Spike ovate-lanceolate. Glumes ob- 

 tuse, with scarious margins. Stamens 2. Seed striate, with a sagittate 

 tubercle. Bristles plumose. — If. July — Aug. Wet soils. 10 — 12 in. 



5. E. filifor'mis, (Kunth.) (Scirpus filiformis, Lam.) Stem filiform, 

 terete. Spike cylindrical, oblong, obtuse. Glumes nearly round. — July 

 — Aug. Wet places. 



6. E. vivip'ara, (Link.) Culm cespitose, filiform, sheathing at the 

 base. Spikes solitary, elliptic-oblong, obtuse, many-flowered, often vi- 

 viparous ; scales elliptic-ovate. Stamens 3. Seta: 5, white. — On the 

 margins of lakes. Carolina and Georgia. 



7. E. palus'tris, (Brown.) (Scirpus palustris, L.) Stem glabrous, 

 striate, lucid, with 2 — 3 sheaths at the base. Spike oblong-lanceolate. 

 Glume obtuse, with the midrib green. — 2f. April — May. Marshes. 

 1—2 feet. 



8. E. capita'ta, (Brown.) (Scirpus capitatus, Willd.) Stem erect, 

 glabrous, inflated, with a short sheath at the base. Spike ovate. Glumes 

 coriaceous, nearly round. Bristles 6. — 2f . Through the summer. 

 Damp soils. 10 — 18 inches. 



