364 ORDER 154. CYPERACE.E. 



1 T. autumiialis (L.) (Fig. 5.) Culm flattened, 2-edged, very elcndcr, 310'; Ira, 



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

 2", 1 y together, many in the cyme ; glumes sharp- 

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

 smooth. (T) Wet banks, &e. 



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



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

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

 spike 12", mostly single ; glumes acute, 4-rowed, 

 (512 ; stamens 2 ; achenium white, (f) Dry, S. 



ft. coarclata. Cyme contracted ; spks 23", often 

 2 3 clustered together. 



3 T. capillaris (L.) Culm capillary, angular, 38' ; 



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. (I; 

 bandy field*. ('Fig. 8, a flower.) 



4 T. borealis Wood. Culm filiform, angular, 24'; 



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

 leaves; spikes capitate and in cymes, 15 together, 

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

 3-angled ; sty. bulbous at base, (j) 111. Banks of the 

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

 (Mr. Pa-kin*.) 



5 T. stciiopliylla 'Ell.) Culm setaceous, grooved, 



24'; leaves setaceous, 2 3'; bracts many, 3 4 times - \ 



longer than the dense head; ach. (Fig. fl) blackish. S. , \ 



T. Warel (Torr.) Culm filiform, If, 3-angled ; Ivs. 



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

 812 ovate spikes. Fla. 



7 T. carinata (Hook, and Am.) Culm flattcned-setaceou?, 36', with 1 short seta- 



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



8 T. I.KPTALKA (Schultes?) Culms filiform, bright green, flaccid, 612", sheathed at 



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

 sta. 3 ; ach. 3-angled, shining. Cult, in conservatories. From S. Eur. 



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

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

 evtlule jit base. Ach. biconvex, crowned with the persistent style. 

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



1 P. Kcirpoides Torr. Culm 3-sided, slender, 5-9' ; Ivs. linear, 35', about 2 on the 



culm, a cyme in each axil ; spike ovoid, 2-3" ; ach. 2030, smoothish (slightly 

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



2 I*, nltcns (Vahl.) Culm 1} 2f, flattened, with several long linear leaves ; cymes 



loose, spike lance-ovoid, 2", all pedicellate ; ach. 810, conspicuously rugous, tipped 

 with the enl ire-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. 3. Sty. 2-cleft. 

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

 Culms leafy. Bracts discolored. 



1 D. leticocepliala MX. Culm 3-angled, 1 2f; leaves narrow-linear; invol. of G 8 

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

 cate, the tubercle not de-current. Barren?, N. J., and S. 



