526 CYPERACEJ. (SEDGE FAMILY.) 
tubercle. (R. multiflora, Gray. Scirpus schoenoides, Æl.) — Margins of ponds 
in the pine barrens, Georgia, Florida, and westward. June and July. — Nuts 
1" long, several on a spike. 
14. R. caduca, Ell. Culms stout (39 — 49 high), 3-angled ; leaves broadly 
linear (35 — 4" wide); corymbs 4-6, compound, remote, the branches and short 
pedicels erect; spikes very numerous, approximate, ovate; scales caducous; 
nuts 4—8 on the spike, obovate, biconvex, faintly wrinkled ; tubercle flat, con- 
ical, ciliate, } as long as the nut; bristles 6, slender twice as long as the nut. — 
Swamps and wet banks of streams, Florida to North Carolina. Aug. — Spikes 
2'1 long. Nut twice as large as in No. 13. 
. 15. R. miliacea, Gray. Culms tall (3°- 4° high), 3-angled ; leaves flat (3"- 
4" wide); corymbs 6 — 8, distant, compound ; the branches and slender pedicels 
spreading horizontally ; spikes ovate ; scales caducous ; nuts 4-8 on the spike, 
round-obovate, biconvex ; tubercle compressed, conical; bristles 6, slender, as 
long as the nut and tubercle. (R. sparsa, Ell.) — Bogs and deep miry places, 
Florida to North Carolina, June and July.— The nuts of this and the preced- 
ing species remain on the spike after the scales have fallen away. : 
16. R. punctata, Ell. Culms (1°-2° high) slender, 3-angled ; leaves 
short, linear-lanceolate ; corymbs 3 — 4, cluster-like, the lateral ones simple, dis- 
tant, and long-peduncled ; spikes ovate ; nut obovate, compressed, with transverse 
pitted furrows, rather shorter than the 6 slightly hispid bristles ; tubercle conical, 
compressed, shorter than the nut. — Near Savannah and St. Mary's, Georgia, 
Elliott. May and June. dis 
17. R. Grayii, Kunth. Culm solitary, 3-angled (2°-3° high); leaves lin- 
ear, rigid, shining ; corymbs 3 — 4, distant, capitate ; spikes few, large, ovate; on 
round-obovate, tumid, slightly pitted, dull; tubercle short-conical, dilated at the 
base; bristles 6, as long as the nut and tubercle; stamens 3-6. (R. distans, 
Ell. R. Elliottii, Gray.) — Dry pine barrens, Florida to North Carolina. June 
3x * * Nut smooth and even: bristles hispid upward. 
18. R. megalocarpa, Gray. Culms stout (29 - 3° high), 3-angled ; leaves 
candra, Baldw.) — Dry sands along the coast of West and East Florida, and 
Wilmington, North Carolina. May - Aug. 
capitate; spikes ovate, dark chestnut; nut ovate, lenticular, twice as long wer 
flat conical tubercle; bristles 12-14, longer than the nut; stamens 6— "U^ 
à. Cams blunt angled (10 -20 high); eaves short d 
