218 



CYPERACEAE (SEDGE FAMILY) 



843. C. tribuloides. 



344. C. trib., v. rednctft. 



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, 



their tips oppressed. Swales and rich 



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



southw. June-Sept FIG. 343. Var. 



TCRBXTA Bailey. Spikes remote. 



Less common. 



Var. reducta 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, 8. to Ct., N. Y., and la. FIG. 



344. 



4. C. siccata Dewey. Culms slender, 



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 M 

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

 345. 



5. C. Crawf6rdii 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. ^ c crawfordii 



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 3-6 dm. high ; leaves 2.5-3 mm. broad; 



spikes mostly greener and longer, densely 



crowded. Less common. FIG. 347. 



6. C. oron6nsis 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-cylivdric, 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. ^ c. oronensis. 

 broad, very narrowly winged above. Dry 

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

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



7. C. pratensis Drejer. Culms smooth and slender, 3-6 

 dm. high, overtopping the smooth flat (2-3.5 mm. broad) 

 leaves ; inflorescence slender, flexuous, moniliform ; spikes 3-7, 

 silvery-brown, mostly remote, pointed, few-flowered, 7-1.7 mm. 

 long, mostly long-clavate at base ; perigynia ovate-lanceolate, 

 4.5-6.5 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. 

 June-Aug. (Greenl.) FIG. 349. 



8. C. cristlkta Schwein. Culms 1 m. or less high, harsh 

 849. C. pmtensis. above ; leaves soft and flat, 3-7 mm. broad, often equaling 



345. C. siccata. 



