CYPEKACEAE (SEDGE FAMILY) 



233 



430. C. poh'gama. 



79. C atrUta L., var. ovata (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 mature, 1-2.5 cm. long, ellip- 

 soid or short cylindric, reddish-brown to purplish-hlack ; 

 perigynia broadly ovate, thin and puncticulate, very short- 

 beaked, the 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. 



80. C. polygama Schkuhr. Rather 

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

 sharp, roughish above ; leaves very nar- 

 row, rough, mostly shorter than the 429. C. atrata, v. ovata. 

 culm : spikes 2-7, the terminal rarely all 

 staminate, sessile and approximate or the lowest very short- 

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

 dai'k brovjn or variegated; perigynia elliptic and beakless, 

 lohitish 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. ; 

 C. 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-July. (Eu.) Fig. 430. 



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

 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. Smithii Porter. Tall, slender, olive-green, the leaves 



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

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

 peduncled ; perigynia globular and turgid, brovm, squarrose, 

 exceeding the brownish scales. (C. caroliniana Schweiu.) — 

 Fields and woodlands, Gulf States, locally n. to 

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



82. C. virescens Muhl. Slender, erect or 

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

 more or less hai7^y ; spikes 2-4, sessile or slightly 

 stalked, compact, linear-cylindric, 2-Amm. thick; 

 perigynia ellipsoid-ovoid, compressed, costate, 

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

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

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

 bridizes with C. arctata and C. debilis, var, Budgei. 



Var. Swanii Fernald. Lower, 1.5-8 dm. high, the 2-5 thick-cylindi'ic 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. formosa Dewey. Slender, erect, 3-9 dm. higli ; 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 flexut)se or drooping ; perigynia 



431. C. triceps, 

 V. hirsuta. 



virescens. 



433. C. vir., 

 T. Swanii. 



