364 ORDER 154. CYPERACE^E. 



1 T. autummilis (L.) (Fig. 5.) Calm flattened, 2-edged, very elcnder, 310'; IvaJ 



narrow-linear, flat, much shorter ; spikes (Fig. 6) lance-oblong, very acute, 4-rowed, 

 2", 13 together, many in the cyme ; glumes sharp- 

 pointed, brown ; stamens 2 ; achenium (Fig. 7) white 

 smooth. (I) Wet banks, &o. 



2 T. ciliatifblia (Ell.) Culm setaceous, angular, 



3 12' ; leaves setaceous, with long toown hairs on the 

 sheaths : cyme 5-9-rayed, often overtopped by 1 bract ; 

 spike 1 2", mostly single ; glumes acute, 4-rowed, 

 612 ; Btamens 2 ; achenium white. (D Dry, 



/3. coarctata. Cyme contracted ; spks 23", 

 2 3 clustered together. 



3 T. capillaris (L.) Culm capillary, angular, 



leaves setaceous, much shorter, entirely smooth ; spk. 

 2 4 in the simple cyme ; gls. 8 12, strongly keeled, 

 4-rowed; stamens 2; ach. white, equally 3-sided. 

 Sandy fields. (Fig. 8, a flower.) 



4 T. borealis Wood. Culm filiform, angular, 2 4'; 



Ivs. linear, flat, i 2'; bracts similar, as long as the 

 leaves ; spikes capitate and in cymes, 1 5 together, 

 ovoid, green, \" ; glumes pointed; sta. 1 ; ach. white, 

 3-angled ; sty. bulbous at base. (D 111. Banks of the 

 Miss. E., 111. (J. Wolf.) Shores of Lake Sup.. Mich. 

 (Mr. Perkins) 



5 T. steiiopliylla (Ell.) Culm setaceous, grooved, 



2 4'; leaves setaceous, 23'; bracts many, 3 4 times 

 longer than the dense head ; ach. (Fig. 9) blackish. S. 



6 T. "Ware! (Torr.) Culm filiform, If, 3-augled ; Ivs. 



and bracts setaceous, silky-fringed at base, the latter twice longer than the head 01 

 812 ovate spikes. Fla. 



7 T. cariiiata (Hook, and Am.) Culm flattened-setaceou?, 3 &, with 1 short seta- 



ceous leaf at base ; spk. ovoid, near the top ; gls. 5 8, broad-ovate, acuminate. S-W. 



8 T. LEPTALEA (Schultes?) Culms filiform, bright green, flaccid, 6 12", sheathed at 



base, with a short setaceous leaf or ; ppk. ovate, whitish, as long as its brart (3") ; 

 pta. 3 ; ach. 3-angled, shilling. Cult, iu conservatories. From S. Ear. 



12. PSILOCARYA, Torr. Fls. 5 . Gls. oo, imbricated all around, all 

 fertile. Setae 0. Stam. 2, long, persistent. Style 2-cleft, dilated or tuber- 

 culaie at base. Ach. biconvex, crowned with the persistent style, (i) 

 Culms leafy. Spikes lateral and terminal, cymous, brown. 



1 P. scirpoides Torr. Culm 3-sided, slender, 59' ; Ivs. linear, 35', about 2 on the 



culm, a cyme in each axil ; spike ovoid, 23" ; ach. 2030, smoothish (slightly 

 rugous), tippid with the long 2-cleft style. Ponds, R. I., and N. 



2 P. nitens (Vahl.) Culm 1} 2f, flattened, with several long linear leaves ; cymes 



loose, spike lance-ovoid, 2", all pedicellate ; ach. 8 10, conspicuously rugous, tipped 

 with the entire-part of the style, blackish when ripe. S. 



13. DICHROMENA, Rich. Spikes flattened, in a terminal head. 

 Gls. imbricated all around, many empty. Perianth 0. Sta. 8. ^ty. 2-cleft. 

 Ach. lens-shaped, crowned with the broad tubercular base ol' the style. 

 Culms leafy. Bracts discolored. 



1 D. leucocephala MX. Culm 3-angled, 1 2f; leaves narrow-linear: invol. of 6 8 

 narrow leaves, which are whitened at base as well as the spikes ; ach. rugulous, trun- 

 cate, the tubercle not decorreut. Barrens. N. J., and S. 



-rowed, ^f V f O ' A 



Soften ^4V A S 



ir , ^ *^&* 



; sp*- \ 



eeled, 



>t< + \ 



