202 



CY-VERACEAE (SEDGE FAMILY) 



(0.4-1 m. high); leaves narrow (1-3 mm. wide), chatinele^, 

 scarcely rough-margined ; panicle 0.5-3 dm. long., 2-5 cm. 

 broad, of 2-4 umbellifonn cymes, the rays rigidly ascend- 

 ing ; spikelets clustered in heads 3-10 

 together on few peduncles ; achene miter- 

 shaped, the truncate base slightly flaring. 

 — Bogs and wet sandy shores, either 

 fresh or brackish, N. S. to Ont., s. to 

 Fla., Ky., Ind., and la. Aug.-Oct. Fig. 

 328. 



2. C. jamaicense Crantz. (Saw 

 Grass.) Tall (1-3 ni.) and coarse ; 



3->S C mariscoides ^^^^^^ ^^^^^ ^^'^^ ^'^'^' ^^'"^ ^"^ ^^^^' 

 ' ■ • ' i]iQ margins and midrib beneath harshly 



serrate; panicle 3-9 dm. long, the numerous rays bearing 



abundant fascicled small chestnut-colored spikelets ; achene 



obovoid, the truncate base not flaring. (C. effusum Torr.) 



— Shallow water, Va. to Fla. and Tex. (W. I.) Fig. 329. 329. C. jamaicense. 



16. SCLERIA Bergius. Nut Eush 



Flowers monoecious ; the fertile spikelets 1-flowered, usually intermixed with 

 clusters of few-flowered staminate spikelets. Scales loosely imbricated, the 

 lower empty. Stamens 1-3. Style 3-cleft. Achene globular, stony, bony, or 



enamel-like in texture. — Perennials, with triangular leafy 

 culms, mostly from creeping rootstocks ; flowering in summor ; 

 all in low ground or swamps. Inflorescence, in our species, 

 of terminal and axillary clusters, the lower clusters usually 

 peduncled. (Name a-KX-npia, hardness, from the indurated 



*^^^*-^ * Achene smooth. 



1. S. triglomerata Michx. Culm (0.5-1 m. high) and 

 broadly linear (3.5-9 mm. wide) leaves roughish; fascicles of 

 spikelets few, the lowest peduncled, the upper somewhat in 

 threes; achene ovoid-globose or depressed, 2-3 mm. long, on 

 an obscure crustaceous disk. — Low, usually 

 sandy soil, e. Mass. and Vt. (according to John 

 Torrey) to Ont., la., and southw. June-Aug. 

 Fig. 330. Var. gracilis Britton. Culms 

 slender (3-6 dm. long) ; leaves narrower ; 

 fascicles few-flowered, the loioer (2-S-flowered) 

 on very long filiform peduncles; achene nar- 

 rower, 1-1.5 mm. long, acutish. (Var. minor 

 Britton ) —N. Y. and N. J. 



2. S. oligantha Michx. Culms slender, the angles somewhat 



winged ; leaves linear (3-5 mm. wide), smooth except the scabrous^ 



apex ; lateral fascicles 1 or 2, usually on long exserted peduncles ; 



achene ovoid, on a tuberculate disk. — ^Voods, D. C. to Fla. and 



Tex. May-July. Fig. 331. 



* * Achene papillose, granulose or warty. 



3. S. paucifl5ra Muhl. Smoothish or slightly hairy; culm 

 slender (2-() dm. high) ; leaves narrowly linear, 1-3 mm. broad ; 

 fascicles few-flowered, the lateral pedunculate, sessile, or want- 

 ing ; bracts ciliate ; achene globose, 1.5-2 mm. in diameter; the 

 disk a narrow ring bearing 3 pairs of distinct minute tubercles. 

 — Barrens and drvish meadows, N.J. to ()., s. to Fla. and Tex. 

 June-Aug. (W. I.) P^k;. .332. 

 ci- Var caroliniana (Willd.) Wood. Very slender; lenves, culms 

 and scales veru nubescent. — Local, Mass., ()., Ind., and southw. 



iJ30. S. trig-lomerata. 



331. S. olifrantha. 



332. S. pau 

 flora 



