CYPERACEJ2. (SEDGE FAMILY.) 525 



long as the nut. Var. OLOBULARIS. Smaller (6' -15' high) ; corymbs reduced 

 to few globose-ovate dark brown clustered spikes ; nuts smaller, and deeper fur- 

 rowed. Low ground, Florida, and northward. June and July. 



7. R. compressa, Carey. Culms stout, 3-angled (2 -3 high) ; leaves lin- 

 ear, rigid ; corymbs 3 -- 5, remote, spreading ; spikes ovate, numerous, in dense 

 bracted clusters ; scales acute ; nut obovate ; the flat or somewhat depressed 

 sides strongly wrinkled and pitted, twice as long as the 6 bristles ; tubercle 

 conical-beaked, with the dilated base wider than the nut. Margins of pine- 

 barren ponds, "West Florida. June and July. Radical leaves numerous, 1 

 long. 



i- - Bristles equalling or longer than the nut (in No. 9 variable). 



8. R. stenophylla, n. sp. Culms and leaves setaceous; corymbs 1-2, 

 small, erect ; spikes 5-7, distinct, lanceolate-oblong ; nut obovate, biconvex, 

 strongly wrinkled, twice as long as the conical-beaked tubercle ; bristles 6, slen- 

 der, nearly as long as the nut and tubercle. Low grassy pine barrens, Apala- 

 chicola. June and July. Culms tufted, 1 long. 



9. R. microcarpa, Baldw. Culms (2 high) erect, slender, nearly terete ; 

 leaves narrowly linear ; corymbs 4-6, slender, spreading, compound ; spikes small, 

 round-ovate, scattered ; nut round-obovate, lenticular, strongly wrinkled, tipped 

 with the very short and broad tubercle ; bristles 5-6, as long as the nut. 

 Varies with the spikes clustered, and the 3 bristles not half the length of the 

 nut. Margins of ponds, Florida to North Carolina. July and Aug. 



10. R. inexpansa, Vahl. Culms nearly terete, slender (2 -3 high) ; leaves 

 narrowly linear ; corymbs 4-5, narrow, remote, compound, drooping ; spikes 

 scattered, lanceolate ; nut lanceolate-oblong, compressed, twice as long as the 

 conical-beaked tubercle ; bristles 6, very slender, twice the length of the nut. 

 Swamps and banks of streams, Georgia, and northward. July and Aug. 



11. R-. decurrens, n. sp. Culms (2 -3 high) erect, nearly terete, very 

 slender and bending near the top ; leaves linear, elongated, flat and somewhat 

 glaucous ; corymbs 5-6, remote, compound, the bristle-like branches spreading 

 or drooping; spikes (1" long) ovate, scattered, pedicelled ; nut obovate, lentic- 

 ular, slightly wrinkled and pitted ; tubercle compressed, crescent-shaped, with 

 the edges decurrent, the length of the nut ; bristles 6, as long as the nut. 

 Marshy banks of lakes and rivers, West Florida. June and July. 



12. R. patllla, Gray. Culms 3-angled (2 -3 high), slender above; leaves 

 linear ; corymbs 3-5, remote, compound, widely spreading ; spikes scattered, 

 ovate, on slender stalks ; nut round-obovate, lenticular ; tubercle flat, conical, 

 half the length of the nut, ciliate on the edges ; bristles 6, rather longer than the 

 nut. Varies with the spikes lanceolate, the narrower nut contracted at the 

 base, and the bristles twice the length of the nut. Banks of pine-barren 

 streams, Florida and Georgia. June and July. 



13. R. Elliottii, Dietr. Culm (2 -3 high) 3-angled; leaves linear (!"- 

 2" wide) ; corymbs 3-5, compound, the lower ones remote; spikes small, ovate, 

 crowded ; nut obovate, flattened, strongly wrinkled ; tubercle broadly conical, 

 flat, as long as the nut; bristles 6, strongly hispid, as long as the nut and 



