526 i rPERACE.fi. (sedge family.) 



tubercle. (K. multiflora, Gray. Scirpus Bchoenoides, Ell.) — Margins of ponds 

 in the pine barrens, Georgia, Florida, and westward. June and July. — Muts 

 ^" long, BeTeral nn a spike. 



14. R. caduca, Ell. Culms stout (3° -4° high), 3-anglcd ; loaves broadly 

 linear (.'!"- 4" wide) ; corymbs 4-6, compound, remote, the brandies and short 

 pedicels erect; Bpikes very numerous, approximate, ovate; scales caducous; 

 nuts 4 — 8 on the spike, obovate, biconvex, faintly wrinkled; tubercle flat, con- 

 ical, ciliate, J as long as the nut ; bristles 6, slender twice as long as the nut. — 

 Swamps and wet hanks of streams, Florida to North Carolina. Aug. — Spikes 

 2" 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 G - 8, distant, compound ; the branches and slender pedicels 

 spreading horizontally ; spikes ovate ; scales caducous ; nuts 4-8 on the spike, 

 ronnd-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, 1)11- Culms (l°-2° high) slender, 3-angled; leaves 

 short, linear-lanceolate ; corymbs 3-4, cluster-like, the lateral ones simple, dis- 

 tant, and long-pedunclcd ; 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, 



May and June. 



17. R. Grayii, Knnth. Culm solitary, 3-angled (2°-3°high); leaves lin- 

 ear, riiri'l, shining; corymbs 3-4, distant, capitate; spikes few, large, ovate; nut 

 ronnd-obovate, tumid, slightly pitted, dull; tubercle short-conical, dilated at the 

 base; bristles 6, as long as the nut and tubercle; stamens 3-6. (II. distans, 

 Ell. R. Elliottii, Gray.) — Dry pine barrens, Florida to North Carolina. June 

 and July. 



* * Nut smooth and even: bristles hispid upward. 



18. R. megaloearpa, Gray. Culms stout (2° -3° high), 3-angled; leaves 

 rigid, linear, shining ; corymbs 4-6, distant, spreading or somewhat contract- 

 t'l; Bpikes (.!" long) ovate, single; nut large (2" long), orbicular-obovatc, 

 biconvex, lighl brown, turning blackish ; tubercle short-conical from a spreading 



bristles 6 — 10, commonly Bhorter than the nut; stamens 12. (R. dode- 

 candra, Baleho.) — Dry sands along the coast of Wot and East Florida, and 

 Wilmington, North Carolina. May -Aug. 



19. R. Baldwinii, Cray. Culms (2° -8° high) sharply 3-angled, rough; 



short, glaucous, Bmooth, very acute ; corymbs l - :t. contracted or nearly 



capitate' : --pikes ovate, dark cbestnut ; nut ovate, lenticular, twice as long as the 

 flat conical tubercle; bristles 12-14, longer than the nut; stamens 6. — Wet 



pine barrens, Georgia and Florida. June and July, 



20. R. ciliata, Vahl Culms blunt-angled (l°-2°high)j leaves short, glau- 



near lance. . late, obtuse, fringed on the margins ; corymbs mostly solitary, 



pikes Ugbi brown, ovate; nut oval, lenticular, minutely roughened; 



