224 



CYPERACEAE (SEDGE FAMILY) 



C. arcta. 



384. C. canescens. 



flowered green spikes (3.5-7 mm. long), the terminal usually with a long-clavate 

 base, the lower often subtended by a setifonn bract ; perigynia elliptic-ovate, 

 with a narrow substipitate base, wide-spreading or recurved, much exceeding 

 the acutish scales. Wet woods and swamps, e. Mass, to centr. 

 N. Y. and Del. May, June. FIG. 382. 



31. C. Arcta Boott. Pale green or somewhat glaucous ; culms 

 very soft, in loose stools, 1.5-0 dm. high, often overtopped by the 

 soft flat leaves (2.5-4 mm. broad) ; inflorescence of 

 5-13 ovoid or subcylindric spikelets (6-11 mm. 

 long) ; perigynia cordate-ovate, with a rather definite 

 beak, strongly nerved on the outer, faintly on the 

 inner face, 2-3 mm. long, 1.2-1.5 mm. broad, some- 

 what exceeding the acute often brown-tinged scales. 

 ( G. canescens, var. polystachya Boott.) Wet woods, alluvial 

 thickets, etc., Me. and Que. to B. C., s. to Mass., N. Y., Mich., 

 and Minn. June-Aug. FIG. 383. 



32. C. canSscens L. Culms soft, in loose stools, 1.5-6 dm. 

 high ; leaves soft and flat, shorter than or exceeding the culms ; 

 inflorescence 2.5-5 cm. long, of 4-7 short-cylindric 

 to narrowly obovoid appressed-ascending approxi- 

 mate or slightly remote spikes ; perigynia ovoid- 

 oblong, usually serrulate toward the short-pointed tip, 1.3-1.7 mm. 

 broad, more or less nerved on both faces, somewhat exceeding 

 the ovate pointed scale. Wet places, Lab. to B. C., 

 locally s. toCt., and Mich. May-Aug. (Eurasia.) 

 FIG. 384. 



Var. subloliacea Laestad. Smaller ; the spikes 

 385 C can s short-oblong or subglobose ; perigynia smaller, barely 

 v subloliacea ' 2 mm - Ion 9i smooth throughout. Similar range. 



f (Eu.) FIG. 385. 



Var. disjuncta Fernald. Tall and lax, 3-8 dm. high ; inflo- 

 rescence elongated, flexuous, 0.5-1.5 dm. long; spikes 5-8, ellip- 

 soid to cylindric, all but the terminal remote ; 

 perigynia as in the species. Nfd. to Wise., 0., 

 and Pa., common. FIG. 386. 



33. C. brunnescens Poir. Very slender and 

 lax ; culms 1.5-7 dm. high ; leaves soft, flat ; 

 inflorescence 1-6 cm. long, of 3-6 more or less 

 remote or approximate subglobose or ellipsoid 

 spikes (3-7 mm. long}; perigynia 2-2.7 mm. 

 long, 1-1.5 mm. broad, serrulate at the base 

 of the distinct beak, loosely spreading when 

 mature. (C. canescens, vars. alpicola Wah- 

 lenb. and vulgaris Bailey.) Open woods and 386. C. canesc., 

 dry rocky banks, Nfd. to B.C., s. to N. C., Mich., Wise., etc. v. disjuncta. 

 Jurie-Aug. (Eu.) FIG. 387. 



34. C. bromoides Schkuhr. Very slender and 

 lax, green, scarcely glaucous ; the culms 3-8 dm. 

 long, mostly exceeding the soft flat leaves ; 

 inflorescence loosely subcylindric, 2-5.5 cm. 

 long, of 2-6 approximate or slightly scattered 

 spikes (0.5-2. cm. long} ; beak of the perigynium 

 ^-f as long as the strongly nerved body, slightly 

 exceeding the oblong pointed scale. Rich low 

 woods and swamps, N. S. to Ont., and south w. 

 May- July. FIG. 388. 



35. C. Deweyana Schwein. Very lax, glau- 

 cous; the culms 2-12 dm. long, much exceeding 

 the soft flat leaves ; inflorescence flexuous, 2-6 



888. C. broinoides. cm. long ; the 2-7 spikes, 3-12rflowered (5-12 



887. C. brunnescens. 



C. Deweyana. 



