532 CYPERACE^. (sedge FAMILY.) 



warts, those at the base elongated ; lobes of the disk 6, distinct, globose. (S 

 Caroliniana, Willi., the villous form ) 



Var. glabra. Smooth throughout, or the loaves and bracts scabrous at the 

 summit; culms erect (1° high), rigid, but slender, like the erect leaves ; clusters 

 terminal ; spikes many-flowered ; lobes of the disk 3, each 2-lobed. This also 

 varies, with longer (2°-2j°) diffuse culms, and with 1-2 distant axillary clus- 

 ters on long (5'- 10') drooping peduncles. — Low sandy pine barrens, Florida, 

 and northward j the varieties chiefly southward. May -Aug. 



§ 2. HYPOPORUM. D^k none : nut concave and often pitted at the sides of 



the triangular base. 



* Clusters of spikes terminal, leaft/-bracted. 



8. S. Baldwinii, Terr. Culms rough above (2° -3° high); leaves mostly 

 2, linear, rigid ; nut large (2" long) dull white, globose-ovate, obscurely angled, 

 longitudinally furrowed, concave at the sides of the abruptly contracted base, 

 slightly pointed. — Pine-barren swamps, Plorida and Georgia, near the coast 

 June and July. 



9. S. gracilis, Ell. Culms .slender (1° high), smooth, like the filiform 

 leaves; nut small (1" long), ovate, dull white, furrowed lengthwise, the sides at 

 the base concave and pitted. — Low pine barrens, Florida to South Carolina 

 June and July. — Plant brownish, tufted. 



* * Clusters of spikes [small) numerous, scattered near the summit of the culm, form- 

 ing an interrupted compound spike : bracts mostly short. 



10. S. flliformis, Swartz. Glaucous; culms slender (lJ°-2° high), 

 smooth ; leaves narrowly linear, rough on the margins and keel, ciliate at the 

 throat ; clusters 3-4, erect, few-flowered, the lowest remote, leafy-bracted ; 

 scales lanceolate, rough-pointed ; stamens 3 ; nut obovate, obscurely 3-angled, 

 smooth and glassy, concave at the base, not pitted. — South Florida. Oct. 



11. S. vertioillata, Muhl. Culms very slender (6' -12' high), smooth, 

 like the narrowly linear or filiform leaves and sheaths; clusters 3-5, erect; 

 scales smooth ; nut very small, globose-3-angled, pointed, rough with raised 

 wavy ridges, not pitted at the base. — Varies with hairy sheaths, more numer- 

 ous (6 -9) clusters, and reticulated nuts. — Damp soil, Florida, and northward. 

 June and July. 



12. S. Michauxii. Culms (6'- 12' high) smooth; leaves linear, and, like 

 the sheaths, hairy ; clusters 4-6, nodding; scales bristle-awned ; nut globose- 

 3-angled, very minute, pointed, smooth, not pitted at the base. (S. interrupta, 

 Miclix., not of Richard.) — Low pine barrens, Florida to South Carolina. July 

 and Aug. 



21. CAREX, L. Sedge. 



Flowers monoecious, rarely dioecious, spiked. Sterile and fertile flowers in 

 the same spike (androgi/nous), or in separate spikes. Scales imbricated in few- 

 many rows. Stamens 2-3. Style 2-3-eleft, exserted from a sac (perigt/nium) 

 which encloses the ovary and the lenticular biconvex or 3-angled nut. — Peren- 



