CYPERACEAE (SEDGE FAMILY) 



229 



413. C. crus-corvi. 



414. C. arenaria. 



of the iiicouspicuous scale. — Swamps and bottoms, 

 Ind. to Minn., ]Seb., and south w. ; rare northw. June, 

 July. Fig. 413. 



58. C. AREXARiA L. Extensively creeping, 0.7-5 dm. 

 high ; leaves very narrow ami very long-pointed^ shorter 



than the culm; head dense or some- 

 times interrupted, ovoid or cylindric ; 

 spikes few to many, those at the apex 

 of the head usually staminate, the 

 intermediate ones staminate at the 

 summit, the lowest entirely pistillate 

 and subtended by a bract 1—3 cm. 



long ; iDcrigynium very strongly nerved on both faces, wing- 

 margined above, sharply long-toothed, about the length of 

 the brown snbulate-acuminate scale. — Sea-beaches near Nor- 

 folk, Va. (Nat. from Eu.) Fig. 414. 



59. C. Sartwellii Dewey. Culms stiff and strict, 0.3-1.2 

 m. high, from an elongate dark rootstock ; leaves (2-5 mm. 

 wide) produced into a long slender point, mostly shorter than 

 the culm ; staminate Jloicers variously disposed, frequently whole 

 spikes being sterile ; head 2.5-7 cm. long and rather narrow, 

 the individual spikes usually clearly defined, or occasionally the 

 head interrupted below, ta.vmy-hrown ; perigynium 3-5 mm. 

 long, elliptic or lance-elliiDtic, nerved on both sides, very gradu- 

 ally contracted into a short beak; scale blunt, smooth, hyaline- 

 edged, about the length of the perigynium. — Bo^s, centr. N, Y. 

 to B. C, s. to O., 111., la., S. Dak., etc. June, 

 July. Fig. 415. 



60. C. stenophylla Wahlenb. Stiff, tufted, 

 0.5-2.5 dm. high; leaves pale, involute and 

 shorter than the culm ; perigynium ovate, 

 gradually contracted into a short and entire 

 rough-edged beak, tightly inclosing the achene, 

 at maturity longer than the hyaline acutish scale. — Dry grounds, n 

 the Rocky Mts. . and northw. June, July. (Eurasia.) Fig. 416. 



61. C. chordorrhiza L.f. Very extensively stoloniferous ; 

 culms mostly lateral and solitary, 1-4.5 dm. long; leaves 

 involute, shorter than the culm ; perigynium compressed-ovoid 



to sub-globose, short-pointed and entire, 

 about the length of the acute scale. — 

 Cold bogs and soft lake-borders. Que. to 

 B. C, s. to Me., Vt., Pa.. 111., la., etc.; 

 infrequent. May-July. (Eurasia.) Fig. 

 417. 



62. C. capitata L. Bigid, 0.7-5 dm. high 

 form, shorter than the culm ; head uniformly staminate 

 above, brown, very small, 0.5-1 cm. long; 

 perigynium broadly ovate, very thin, whitish, 

 prominently beaked, nerveless or nearly so, 

 erect and appressed, longer than the very 

 thin and obtuse scale. — Alpine region of 

 Mt. Wa.shington, N. H. June-Aug. (Eu.) 41S. C capitata 

 Fig. 418. 



63. C. maritima O. F. Mueller. Mostly stout ; culm 

 sharp, smooth or rough above, 2-7 dm. high, usually over- 

 topped by the leafy tufts and the broad bracts ; leaves 

 smooth and flat, strongly ribbed, 3.5-10 mm. broad ; pis- 

 tillate spikes 2-6, scattered, 2-8 cm. long, 0.8-2 cm. thick, 

 often staminate at tip ; staminate spikes 2-4, unequal, 



419. C. maritima. the terminal 2-6 cm. long ; perigynium nearly orbicular, 



416. C. stenophylla. 



415. C. Sartwellii. 



la. to 



417. C. chordorrhiza. 



leaves Uli- 



