532 CYPEnACK^. (SEDGK FAMII.V.) 



Avnrts, tliosc nt (lie base clonfjaU-d , lohcs of tlio (li>k fi, distinct, globose. (S 

 Carolinian;!, Willd., tiic villous form ) 



Var. glabra. Smootb tbroii'^'liinit, or tlir- liaves anil bracts scabrous at tlic 

 summit ; culms erect (1° bijjb), rij,'i(l, but slcmkr, like the erect leaves , cluster.-t 

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

 varies, with longer (2°-'2h°) ditfuse culms, and with 1 -2 distant axillary clus- 

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

 and northward , the varieties ehiclly southward. May- Aug. 



^ 2. IIYl'OrORUM. Disk none: nut concave and often pitied at the sides of 



the triavijulur base. 



* Clusters ofsiiifces terminal, leafij-hracted. 



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

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

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

 slightly pointed. — Pmc-barren swamps, Florida aiul Georgia, near the coast 

 June and July. 



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

 leaves; nut small (I" 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 ike simimit of tlte culm, form- 

 iwj an interrupted compound spike : bracts mostly short. 



10. S. flliformis, Swartz. Glaucous; culms slender (I^°-20 high), 

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

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

 scales lanceolate, rough-])ointed ; stamens 3; nut obovate, obscurely 3-anglcd, 

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



11. S. verticillata, Muhl. Culms very slender (G'-12' high), smooth, 

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

 scales smooth ; nut very small, globosc-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 bristlc-awned ; nut globo.se- 

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

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

 and Aug. 



21. CAREX, L. Skoge. 



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

 the same spike (androifijnous), or in separate spikes. Scales imbricated in few- 

 many rows. Stamens 2-3. Style 2-3-cleft, e.xserted from a sac (peri(ji/nium) 

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



