368 



ORDER 154. CYPERACE^. 



fascicles few-flowered, the lateral, if any, pedunculate ; ach. Email, rough, the dick 

 6-lobed. Hare northward, common South. 10 16'. 



/3. g-labra. Smoothish, slender, If; lateral fascicles 1-flowered, orO. Ms. to Ohio. 



y. Caroliniana. Scabrous-hirsute, slender ; leaves much exceeding the culm. 8. 



S. JEllidttii. Stoat, 2 3f, denticulate-ciliate ; lateral spikes pedunculate. S. 



5 S. reticularis MX. Slender, If, leaves shorter than culm; fascicles 2 5, distant, 



subsessile ; ach. dead-white, f ', conspicuously netted and pitted. R. I. to Fla. 



6 S. laxa Torr. Slender, weak, diffuse, 1 2f ; Ivs. flat, V wide ; fascicles very remote, 



spks. distant, in pairs ; ach. 1", with transverse ridges and brown pits. N. J. to Fla. 



7 S. vcrticlllata Muhl. Glabrous, 612', slender; fascicle? 46, smooth, purple, 



sessile, 8" 1' apart ; ach. globular, about i", rugous. N. Y. to Ohio, and South. 



8 S. Interrupta MX. Sparingly hirsute, 1230'; leaves 2" wide; fascicles 57, 



rusty-brown, sessile, ciliate, 49" apart ; ach. smooth, \' f diameter. South. 



9 S. gracilis Ell. Filiform, smooth, 1 2f; spikes few (15 pairs), 3", in a terminal 



fascicle; bract erect; ach. ovid-triangnlar, ribbed lengthwise. South. 



10 S. ISald \viiiii (Torr.) Culm scape-like, 2 3f, leaves all radical, long; spikes 5" 

 long, 35 pairs in a terminal fascicle, brown-purple, with 3 bracts, middle bract erect ; 

 ach. dull-white, 2" long, even. In Georgia and Florida. 



18. CHAETOSPORA, R. Br. Spikes 1-5-fl owered, fls. , glumes in two 

 rows, the lower empty. Setre 36. Stam. 3. 



Style 3-fid, deciduous. Achenium triangular. 



U Culm leafy only at base. Fls. capitate, * 



chesi nut-brown. 



C. nigricans K. Culm If, erect, teretieh, longer 

 than the narrow erect leaves ; spikes 4" long, in 

 one fascicle, bract erect, 1 3' ; achenium \" 

 diameter, white. Fla., Eur. 



19. CAREX, L. Flowers diclinous. Spks. 

 1 or more, either with both staminate and 

 pistillate flowers (androgynous), or with the 

 two kinds in separate spikes on the same plant 

 (moncecwus), or rarely on separate plants (diw- 

 cious}. Glumes single, imbricated, each 1-flwd. 



$ Stamens 3. ? Stigmas 2 or 3. Nut (ache- 

 nium} 2-edged or 3-angled, enclosed in a sac 

 (perigynium} composed of 2 united glumes. 

 n Culms triangular, in tufts, with grass-like 

 leaves and usually with axillary as well as 

 terminal spikes. 



The following enumeration of our Carices 

 is reduced from the excellent monograph by 

 the lamented Prof. C. Dewej T , contained in the 

 Class-book of Botany, and revised with the 

 assistance of friend- before mentioned, and 

 whose names appear below. 



Fig. 13, C. flava. 14, One of its perigynia 

 (magnified) : 15, a glume. Fig. 16, C. rosea. 

 17, A perigynium : IS, a glume. 



