558 CYl'KKACK/K. (sKlxiK K.V.MIKV.) 



-'. D. latifolia, BaMw. Ciilnis stout (2^-:)'^ liij^li), iio;irly torctc ; leaves 

 broailly linear, eloiigate>l ; leaves of tlie iiivolmre «-'.», ta|ipriii;; from the 

 broad (.'J" -4" wide) base to tiii' tdciider snniiiiit, liocoining reddish ; nut round- 

 ohovate, faintly wrinkled ; tul)ercle Hat.conieal, olituso, t Ik; sides deeurrent on 

 the ed;^es of tlie nut. — Low pine liarrens, Florida to North Carolina. May- 

 July. — Heads larger than those of tlie preceding. 



18. CLADIUM, 1*. Br. 



Spikes ovate, 1-2-flowered. Scales loosely imbricated, the lower ones 

 empty. Perianth none. Stamens 2. Style 2-3-cleft, the divisions often 

 2 -3-eleft, deciduous. Nut globose-ovate, the pericarp thickened and corky 

 near tlie apex. Tubercle none. — Culms tall. Spikes disposed in a.xillary 

 and terminal cyme-like panicles. 



1. C. eflfusum, Torr. (Saw-Grass.) Culms (4° -8° high) nearly terete; 

 leaves linear, elongated, saw-edged ; panicles numerous, diffuse ; spikes small, 

 3-4 in a cluster, deep brown ; scales about 6, the uppermost bearing a per- 

 fect flower, the next below staminiferous, the others empty ; nut ovate, pointed, 

 wrinkled. (Schoenus effusus, Su-artz.) — Fresh or brackish marshes along the 

 coast, Florida to Xortli Carolina, and westward. July -August. 



2. C. mariscoides, Torr. Culms nearly terete ; leaves narrow-linear, 

 sinoothish; panicles 2 -3, the few branches erect; spikes 3 - 8 in a cluster ; 

 nut ovate, acute, faintly wrinkled. (Schoenus, Muhl.) — Grassy ponds, West 

 Florida, North Carolina, and northward. 



19. SCLERIA, L. Nct Rush 



Flowers monoecious. Sterile spike few - many-flowered. Scales loosely im- 

 bricated in 2-3 rows. Fertile flowers solitary, separate or at the ba.se of the 

 sterile spike. Stamens 1 -3. Style 3-cleft. Nut globose or ovate, stony or 

 hony. — Chiefly perennials, with creeping rootstocks, and triangular leafy 

 culms. Spikes clustered, lateral and terminal. 



§ 1. ScLERiA proper. — Nut supported bi/ an annular or 3 -f>-lobed disk. 



« Nut smooth : stamens 3. 



1. S. triglomerata, Michx. Culms stout, rough, sharply angled (2° -3° 

 high); leaves broadly linear, smooth or hairy; spikes disposed in 3 -6 clus- 

 ters at the summit of the culm, and 1-2 distant lateral ones on long and 

 drooping peduncles ; disk forming a complete narrow ring at the base of the 

 globose-ovate yellowish white nut. — Low grounds, Florida, and northward. 

 June- August. 



2. S. Oligantha, Ell., Michx.? Culms (l°-2° high) slender, smooth, 

 sharply angled, often glaucous, like the smooth linear leaves; spikes 3-5, sin- 

 gle, scattered, forming a terminal interrupted compound spike, and 1 -2 dis- 

 tant lateral ones, on long drooping peduncles; bracts leafy ; disk of 9 minute 

 globular lobes at the base of the white and polished ovate nut. — Thickets 

 and margins of fields, Florida to South Carolina. July. 



