218 



CYPBRACEAE (^SBDGE FAMILY) 



843. C. tribuloides. 



344. C. trib., V. reducta. 



reseence compact, the 8-14 obovoid ascending aomewhat crowded 



gray-green or dull-brown spikes 7-12 



mm. long ; perigynia S.I -5 mm. long, 



their tips appressed. — Swales and rich 



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



southvv. June-Sept. Fig. 343. Var. 



turbXta Bailey. Spikes remote. — 



Less common. 



Var. reddcta 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. 

 844. 



4. C. sicca ta Dewey.' Culms slender, 

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

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

 staininate 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., 

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

 345. 



5. 0. 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- 

 845. 0. siccata 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. ^^'q crawfordU 

 scoparia, var. minor Boott. ) — Open soil, 

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

 Sept. Fig. 346. Var. vIgens 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. oronfinsis Fernald. Culms few in 

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

 sharply angled and harsh above ; leaves smooth, 

 2. 5-4 mm. broad, much shorter than the culms ; 

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



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

 scales dark, with pale scarious margins ; peri- 

 gynia appressed, about 4 mm. long, 1.3 mm. 3^ f, „^.^„^„sis 

 broad, very narrowly winged above. — Dry 

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

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



7. C. prat^nsis Drejer. Culms smootli 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. crist^ta Schwein. Culms 1 m. or less high, harsh 

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



34T. C. Crawfordii, 

 V. vigons. 



849. 0. pratensls. 



