CYPERACER. (SEDGE FAMILY.) 911 
spikelets or a single one. Spikelets somewhat glaucous, 4" — 6" Jong, serrated by 
the projecting points of the scales. 
27. C. trachynotus, Torr. Umbel simple, of 3-5 short erect rays; in- 
volucre elongated, 3-leaved ; spikelets several in a cluster, lanceolate, compressed, 
12-20-flowered; scales whitish, ovate, acuminate, loosely imbricated in fruit, 
hispid-serrulate on the keel, the broad margins embracing the pear-shaped acutely 
angled nut; culm flattened on one side, rounded on the other, as long as the 
slender keeled leaves. — Dry sandy soil, South Florida. May - Nov. — Culms 
9/ - 15! high, straw-color, like the leaves. Spikelets }/ long. 
LES Spikelets numerous in compact globular or oblong heads. 
+ Perennials: culms tumid or tuberous at the base. 
28. C. fuligineus, n. sp. Head solitary, globose, shorter than the 2-leaved 
involucre; spikes lanceolate, acute, compressed, 8 —12-flowered ; scales (black) 
ovate, obtuse or emarginate, mucronate; nut oblong-obovate; culms filiform, 
obtuse-angled, thrice the length of the narrow rigid leaves. — Key West. No- 
vember. — Culms j9-19 high. Sheaths of the leaves blackish. Head 5" in 
diameter. Scales 9-nerved. 
29. C. filieulmis, Vahl. Umbel of 1-2 spreading rays or none; invo- 
luere 3 - 4-leaved ; spikelets 15 —20, in a dense globose head, linear-lanceolate, 
6-—10-flowered ; joints of the rachis barely margined; scales (greenish) ovate, 
obtuse or emarginate, short-mucronate, loosely imbricated ; nut obovate ; culms 
(10’- 15' high), slender, wiry, longer than the linear leaves. (C. mariscoides, ÆU.) 
— Dry sandy soil, Florida, and northward. July- Sept. — Heads }/ in diameter. 
30. C. Grayii, Torr. Umbel of 4-6 erect rays, shorter than the 3-4- 
leaved involucre; spikelets 6-9 in a rather loose head, linear or linear-lanceo- 
late, 5- 7-flowered ; joints of the rachis winged; scales (brownish) closely im- 
bricated (spreading in fruit), ovate or oblong, obtuse; nut obovate; culms (8’- 
12! high) filiform, wiry, longer than the bristle-shaped leaves. — Dry sandy pine 
barrens, Florida, and northward. Aug. and Sept. 
31. C. ovularis, Torr. Umbel 3-6-rayed, rarely wanting; heads small, 
globose or oblong; spikelets (117—2" long) angular, obtuse, 2-4-flowered ; 
scales ovate-oblong, obtuse, mucronate, closely imbricated; nut oblong; culms 
filiform, smooth ; rather acute-angled, much longer than the rigid filiform leaves. 
(Mariscus ovularis, Vahl. M. cylindricus, Ell.) — Wet or dry soil, Florida, and 
northward. Aug. and Sept. — Culms 4° -2° high. Heads 2" -3" in diameter. 
82. C. retrofractus, Torr. Umbel of about 8 slender (2/- 6! long) rays, 
longer than the involucre ; heads obovate; spikelets subulate, reflexed, terete ; 
scales 4— 5, the two lower ones ovate and empty, the upper lanceolate, acute; 
nut linear-oblong: culm tall (2°-4°), downy and roughish, like the broadly 
linear leaves. (Mariscus retrofractus, Vahl.) — Barren sandy soil, Florida, and 
northward. fer: Sept. — Leaves much shorter than the culm. 
i 4— + Annuals: roots fibrous. We 
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