CYPBRACEAE (SEDGE FAMILY) 



23b 



C, atrata, v. ovata. 



79. C atrita L., var. ovllta (Rudge) Boott. Very slender but erect, 2-9 

 dm. high ; culm rather sharp, roughish above ; leaves narrow but flat, shorter 

 than the culm ; spikes 3-6, all but the terminal one on 

 slender stalks, drooping when niatui'e, 1-2.5 cm. long, ellip- 

 soid or short oylindrio, reddish-brown to purplish-black; 

 perigynia broadly ovate, thin and puncticulate, very short- 

 beaked, ihe orifice slightly notched ; scales blunt, thin- 

 margined, about as long as the perigynia. 

 ( C. atratiformis Britton. ) — By streams 

 and in cold ravines, Nfd. to Athabasca, 

 locally s. to the mts. of n. N. E. June- 

 Aug. Fig. 429. 



bO. C. polygama Schkuhr. Rather 

 slender but stiff, 2-9 dm. high ; culm 

 sharp, roughish above ; leaves very nar- 

 row, rough, mostly shorter than the 

 culm ; spikes 2-7, the terminal rarely all 

 staminate, sessile and approximate or the lowest very short- 

 stalked, from globular to narrowly cylindrio, 0.7-5 cm. long, 

 430 polygama. ^''■^^ brovin or Variegated; perigynia elliptic and beakless, 

 whitish and granular, nearly nerveless, the orifice entire ; 

 staminate scales very long-lanceolate, the pistillate lance-ovate and very sharp, 

 conspicuously longer than the perigynia. (C. fusca Man. ed. 6, not All. ; 

 G. Buxbaumii Wahlenb. ) — Bogs and wet shores, e. Que. to Alaska, 

 s. to Pa., Great Lake region. Mo., Utah, and Cal. ; and in the mts. 

 toN. C. May-Iuly. (Eu.) Fig. 430. 



81. C. triceps Michx., var. hirsuta (Willd.) Bailey. Slender j 

 leaves narrow, hairy; spikes 2-4 (usually 3), all contiguous or 

 occasionally the lowest somewhat removed, sessile, thick-cylindric 

 to globular, green or brown (4-7 mm. thick); perigynia broad- 

 ovoid, flattish, very obtuse, often sparsely hirsute 

 when young but smooth at maturity; staminate 

 scales very sharp ; pistillate scales acute or short- 

 awned, about the length of or shorter than the 

 perigynia. (C triceps Britton in part, not Michx.) 

 — Copses and dryish meadows, N. E. to Ont., and 

 south w., rare northeastw. May-July. Fig. 431. 

 — ■ Hybridizes with C. gracillima. 



Var. Smfthii Porter. Tall, slender, olive-green, the leaves 

 very long, very nearly smooth; spikes small, globular to cylin- 

 drio, the lowest often somewhat remote, all more inclined to be 

 peduncled ; perigynia globular and turgid, brown, squarrose, 

 exceeding the brownish scales. (O. earoliniana Schwein.) — 

 Fields and woodlands, Gulf States, locally n. to 

 N. Y., 111., and Mo. May, June. 



82. C. virlscens Muhl. Slender, erect or 

 spreading, 0.4-1 m. high ; leaves very narrow, 

 more or less hairy ; spikes 2-4, sessile or slightly 

 stalked, compact, linear-cylindrio, 2-4 mm. thick; 

 perigynia ellipsoid-ovoid, compressed, costate, 

 usually longer than the thin whitish acute scales. (Var. eostata 

 Dewey ; O. costellata Britton.) — Dry banks and copses, s. Me. 

 to s. Ont., and southw. June, July. (W. L) Fig. 432. — Hy- 

 bridizes with O. arctata and C. debilis, var. Budget 



Var. Swilnii Fernald. Lower, 1.5-8 dm. high, the 2-5 thick-cylindric to 

 subglobose spikes 3-5 mm. thick; the perigynia less strongly ribbed. (C. vires- 

 cens Man. ed. 6, not Muhl.) — Similar range. Fig. 433. 



83. C. formbsa Dewey. Slender, erect, 3-9 dm. high ; leaves flat, often 

 pubescent, 3-7 mm. broad, those of the culm short ; spikes 3-5, scattered, ellip 

 SOid or cylindrical, 1-3 cm. long, compact, all flexuose or drooping ; perigynia 



431. C. triceps, 

 V. hirsuta. 



