218 



CYPERACEAE (SEDGE FAMILY) 



843. 0. tribuloides. 





rescence compact, the 8-14 obovoid ascending somewhat crowded 



gray-green or dull-brown spikes 7-12 



mm. long ; perigynia 3.7-5 mm. long, 



f lii-ir tips appressed. Swales and rich 



open woods, N. B. to Sask., ahd 



southw. June-Sept. FIG. 343. Var. 



TUKBA.TA Bailey. Spikes remote. 



Less common. 



Var. rediicta Bailey. Inflorescence 



usually flexuous, at least the lowest 



spikes scattered ; perigynia with loosely 



recurved tips. (Var. moniliformis Brit- 

 ton, in part.) Gulf of St. Lawrence 



to Ont., s. to Ct., N. Y., and la. FIG. 



344. 



4. C. siccata Dewey. Culmsslender, 



1-6 dm. high ; leaves stiff, 1-3 mm. 

 wide ; inflorescence of 3-7 approximate or scattered glossy brown spikes, the 

 staminate and pistillate flowers variously mixed or in distinct spikes; perigynia 

 obviously distended over the achene, 2 mm. broad, usually 

 with distinct serrulate wings. Dry or sandy soil, Me. to 

 B. C. and Alaska, s. to Mass., Ct., N. Y., 

 O., Mich., and westw. May-July. FIG. 

 345. 



5. C. Crawfordii Fernald. Slender, 

 the culms forming close stools; leaves 

 narrow (1-2.5 mm. wide), often equaling 

 or exceeding the culms ; inflorescence dull 

 brown, subcylindric or ovoid, often sub- 

 tended by an elongate filiform bract ; 

 spikes 3-12, subcylindric or narrowly 

 ovoid, ascending, 3-7 mm. long, approximate ; the linear- 

 lanceolate perigynia plump at base, about 1 mm. wide. (C. 



scoparia, var. minor Boott.) Open soil, 



rarely in woods, Nfd. to B. C., s. to n. Ct., and Mich. June- 

 Sept. FIG. 346. Var. V!GENS Fernald. Stouter throughout ; 



culms 3-0 dm. high ; leaves 2.5-3 mm. broad; 



spikes mostly greener and longer, densely 



crowded. Less common. FIG. 347. 



6. C. orone'nsis Fernald. Culms few in 

 loose stools, tall and erect, 0.5-1 m. high, 



847 C Crawfordii snar ply angled and harsh above ; leaves smooth, 

 v. vigens. ' 2.5-4 mm. broad, much shorter than the culms ; 

 inflorescence thick-cylindric, erect; spikes 3-9, 



ascending, dark brown, rhomboid-ovoid, pointed, 0.5-1 cm. long ; 

 scales dark, with pale scarious margins ; peri- 

 gynia appressed, about 4 mm. long, 1.3 mm. 

 broad, very narrowly winged above. Dry 

 fields, thickets, open woods, and gravelly banks, Orono and 

 Bangor, Me. June-July. FIG. 348. 



7. C. pratSnsis Drejer. Culm* snntnfh and sli'mli-r. :'.-<> 

 dm. high, overtopping the smooth flat ('2-:\. 5 mm. broad) 

 leaves; inflorescence slender, flcsuons, nuniilifonu ; #)n'kcs 3-7, 

 silrrt-if-hrnirn, mostly remote, pointed, frir-floircrrtl. 7-1.7 mm. 

 long, mostly long-clavate at base; i><ri<jiii<i r<tt<-l<ntc<>olate, 



- mm. long, 1.5-2 mm. broad. Open woods, clearings. 

 and prairies, Lab. to B. C., s. to N. S., n. Me., L. Superior, etc. 

 Juno-Aug. (Greenl.) FIG. 31'.'. 



8. C. cristata Schwein. Culms 1 m. or less high, hnruli 

 S4H. <'. pratensis. above ; leaves soft and flat, 3-7 mm. broad, often equaling 



345. C. siccata. 



346. C. Cnuvfordii. 



c orom . Ilsis . 



