202 



CYPERACEAE (SEDGE FAMILY) 



(0.4-1 m. high); leaves narrow (1-3 mm. wide"), channeled, 

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

 broad, of 2-4 umbelliforrn 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. jamaic6nse Crantz. (SAW 

 GRASS.) Tall (1-3 m.) and coarse ; 



0. mariscoides. leaves broad (' 5 ~ 1 Cm ')' Sti & and $ at "< 

 the 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 RUSH 



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 summer ; 

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

 of terminal and. axillary clusters, the lower clusters usually 

 peduncled. (Name cncXypla, hardness, from the indurated 



* Achene smooth. 



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

 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 south w. June- Aug. 

 FIG. 330. Var. GRACILIS Britton. Culms 

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

 fascicles few-flowered, the lower (2-%-flowered) 

 880. 8. triglomerata. on ver y Jon ff filiform peduncles ; achene nar- 

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

 Britton.) N. Y. and N. J. 



J. S. oligdntha 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. Woods, D. C. to Fla. and 

 Tex. May^July. FIG. 331. 



* * Achene papillose, granulose or warty. 



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

 slender (2-6 dm. high) ; leaves narrowly linear, l-'J mm. broad ; 

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

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



disk ;i narrow ring lirariim ';! />,//>* <>f <1i$tiut't mfinitr tubercles. 

 Barrens and dryish meadows, N. ,1.' to ()., s. to Fla. and Tex. 

 Junr-Aim. (W. I.) Fi;. :;:ii>. 



Var. caroliniana (Willd.) Wood. Very slender; Iran'*, 

 and m-nlrx r,r>j j.ttbescent. Local, Mass..' <>., Ind.. and south w. 



