^32 CYPERACE^. (sedge FAMILY.) 



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

 Caroliniana, WiUd., the villous form.) 



Var. glabra. Smooth throughout, or the leaves 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°-^°) diffuse culms, and with 1 -2 distant axillary clus- 

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

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



§ 2. HYPOPORUM. Disk none: nut concave and often pitted at ths sides of 



the trianyular base- 



* Clusters of spikes terminal, leafy -hracted. 



8. S. Baldwinii, Ton-. 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, Florida and Georgia, near the coast 

 June and July. 



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

 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 mostli/ short. 



10. S, flliformis, Swartz. Glaucous; culms slender (Ii°-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-bractcd ; 

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

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



11. S. verticillata, 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 diojcious, 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-cleft, exserted from a sac (perigi/nium) 

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



