CYPERACEAE (SEDGE FAMILY) 



219 



350. C. cristata. 



351. C. albolutescens. 



the culms, sheaths loose ; inflorescence usually dense, cylin- 

 dric to ellipsoid ; spikes 0-15, globose, closely flowered, 

 greenish or dull brown, 0.5-1 cm. long ; perigynia 3-4 mm. 

 long, their tips rosulate-spread- 

 ing. ( C. tribuloides, var. Bailey ; 

 C .cristatella Britton.) Swales 

 and wet woods, e. Mass, and Vt. 

 to Pa., Mo., Sask., and B. C. 

 June-Aug. FIG. 350. 



9. C. albolutescens Schwein. 

 Culms stout and stiff, 2-8 dm. 

 high ; leaves erect, long-pointed, 

 pale green, 2-5 mm. wide, shorter 

 than the culms ; inflorescence 

 stiff, linear-cylindric to subglobose, with or without 

 elongated bracts ; spikes 3-30 (sometimes compound), 

 conic-ovoid to subglobose, 0.6-1 cm. long; perigynia 2-3 mm. broad, rhombic- 

 ovate to suborbicular, pale, with short 

 deltoid firm greenish tips. {C. straminea, 

 vars. foenea Torr. and cumulata Bailey.) 

 Damp or even dry soil, chiefly on the 

 coastal plain, N. B. to Fla. and Mex.. 

 rarely inland ; also L. Huron to Man. 

 July-Sept. FIG. 351. 



10. C. mirdbilis Dewey. Culms 0.3- 

 1.5 m. high, very loose and smooth ; leaves 



soft and thin, 2.5-6 mm. wide, the sheaths 352 c mirat) iii s- 

 rather loose ; spikes 4-12, greenish, sub- 

 globose or ovoid, 5-9 mm. long, mostly approximate; peri- 

 gynia lance-ovate, 3-4 mm. long, with divergent tips. (C. 

 straminea, var. Tuckerm.) Dry banks, open woods, and rich 

 copses, Me. to Man., N. C. and Mo. June, 

 July. FIG. 352. Var. PERLONGA Fernald. 

 Spikes remote. Less common. FIG. 353. 

 Var. tincta Fernald. Spikes 3-7, ovoid, 

 approximate, brown-tinged; scales brown 

 with a pale margin. N. B. and n. N. E. 

 853 c mir v perl Plant comparatively small. 



11. C. straminea Willd. Culms very 



slender, 3-7 dm. high, smooth except at summit ; leaves 854 c Btra miuea. 

 0.5-2 mm. wide; spikes 3-8, yellow-brown, or rarely green 

 ovoid or subglobose, 4-8 mm. long, usually forming a moniliform or linear- 

 cylindric flexuous inflorescence ; perigynia 

 rarely 4 mm. long, lance-ovate, the inner 

 faces 3-5-nerved or nerveless, the ascend- 

 ing tips inconspicuous. (C. tenera 

 Dewey.) Meadows, dry banks, or open 

 woods, N. B. to B. C., Ky., and Ark. 

 June-Aug. FIG. 354. 



Var. echinbdes Fernald. Tips of the 

 slightly longer perigynia divergent and 

 conspicuous. Vt. (Brainerd} ; Ont. and 

 Mich, to la. FIG. 355. 



12. C. hormathddes Fernald. Culms 

 355. C. str., v. echin. dender and flex uous, sharply angled, 

 smooth except at summit, 3-9 dm. high ; leaves shorter than 

 or rarely exceeding the culms, very ascending, 1-2.5 mm. 

 wide ; inflorescence slender, moniliform (or on late culms 

 congested), of 3-9 broadly ovoid brownish spikes (8-12 mm. 

 long} , with or without subtending elongated bracts ; perigynia 356. c. horuiathodes. 



