506 CYl'ERACE.E. (sKI)GE FAMILY.) 



10. R. ccplaaklutlza, Torr. Leaves narrowly linear , flat, L 



very numerous, cruiald in 2-3 or more dense, (jhjbnlar hntds which arc distant (and 

 often in pairs), oblong-lanceolate, dark brown ; acheniuni orbicular-obovate, mar- 

 gined, narrowed at the base, about as long as the awl-shaped beak, half the 

 length of the stout bristles, which are barbed either downwards or upward*. Sandy 

 svamps, Long Island to New Jersey, and southward. Culm stout, 2 -3 high : 

 the fruit, c. larger than in the last, of which very probably it is only a marked 

 variety. 



14. CLADIUM, P. Browne. Twio-Rusn. 



Spikes ovoid or oblong, of several loosely imbricated scales ; the lower ones 

 empty, one or two above bearing a staminate or impeifect flower; the terminal 

 flower perfect and fertile. Perianth none. Stamens 2. Style 2 -3-cleft, decid- 

 uous. Aeheiiium ovoid or globular, somewhat corky at the summit, or pointed, 

 without any proper tubercle. Perennials, with the aspect of Khynchos-pora. 

 (Name from xXciSos, a twig or branch, perhaps on account of the brandling styles 

 of some species.) 



1. C. liiariscoiclcs, Torr. Culm obscurely triangular (l-2 high); 

 leaves narrow, channelled, scarcely rough-margined ; cymes small ; the spikes 

 clustered in heads 3-8 together on 2-4 peduncles; style 3-cleft. (Schoenus, 

 MuhL] Bogs, New England to N. Illinois, and northward. July. 



15. SCLERIA, L. Nux-Kusn. 



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

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

 ones empty. Stamens 1-3. Style 3-cleft. Achcnium globular, stony, bony, 

 or enamel-like in texture. Bristles, &c. none Perennials, with triangular 

 leafy culms. (Name ovcA^pia, hardness, from the bony or crustaceous fruit.) 

 K= Achenium smooth and polished : its base surrounded by an obscurity triangular crus- 

 taceous ring or disk : stamens 3. 



1. S. triglomerftta, Miehx. Culm (2 -3 high) and broadly linear 

 leaves roughish ; fascicles of spikes few, terminal and axillary, in triple clusters, 

 the lower peduncled; achcnium ovoid-globular, slightly pointed (2" broad). 

 Low grounds, Vermont to Wisconsin, &c. ; common southward. July. 



# # Achenium reticulated, seated on a flatfish disk of 3 conspicuous and ovate-lwi- 

 ceolate entire scale-like lol)es: stamens 2. 



2. S. rcticul:*tris, Michx. Culms slender (1 high); leaves narrowly 

 linear; clusters loose, axillary and terminal, sessile or short-pcd uncled ; ache- 

 niiim (/lubnlur, d<-cj>ly pi!t,d IK tin en the re;/u/ar reticulations, not hairy. Sandy 

 swamps, Kastern Massachusetts to Xew Jersey, Virginia, and southward : rare. 

 August. 



3. S. laxa, Torr. Culms slender and weak (l-2 high) ; loaves linear; 

 clusters loose, the lower mostly long-peduncled and drooping; arJienium globular, 

 pitted and someirhrit sf>im/li/ marked with minutil// httiri/ irrinklfs. Sandy swamps, 

 Long Island, New Jersey, and southward, near the coast. Too like the last. 



