CYPERACEAE (SEDGE FAMILY) 



221 



C. festucacea. 



865. C. Bebbli. 



leaves stiff, erect, shorter than the culms, 2-4 mm. wide, the 

 sheath with a thin barely nerved or nerveless pale band 

 extending down from the membranous auricle ; inflorescence 

 cylindric, rarely ovoid, of 6-10 distinct or rarely approxi- 

 mate sitbglobose or broadly ovoid-conic yellow-brown or green- 

 brown ascending spikes (7-12 mm. long) ; perigynia broad- 

 ovate to suborliicular, atrongly 7-\>-nerved on the outer, 

 nerveless or faintly nerved on the inner face ; achenes sub- 

 orbicular. (C. straminea, var. Tuckerm.) Dry or rocky 

 soil, Me. to Man. and Pa. June-Aug. FIG. 363. 



Var. brfcvior (Dewey) Fernald. Lower, 

 rarely more than 0.6 m. high, and more 

 slender,' spikes 3-6, approximate or subap- 

 proximate. (C. straminea, var. Dewey.) 

 Commoner, reaching B. C., Ark., etc. May- 

 July. FIG. 364. 



18. C. B6bbii Olney. Culms rather slen- 

 der, 2-6 dm. high, smooth except at tip ; 

 leaves mostly shorter, ascending but not stiff, 

 1.7-4.5 mm. wide ; inflorescence short, com- 



ovoid to ellipsoid, brown, 1-2 cm. long, of 3-12 globose or ellipsoid 

 ascending spikes (5-8 mm. long); perigynia narrowly ovate, 

 3-3.5 mm. long, 1.5-2 mm. broad, mostly dull brown, and 

 loosely ascending, faintly ffic-nerved or nerveless ; scales oblong, 

 bluntly acuminate. ( C. tribuloides, var. Bailey.) 

 Low grounds, Nfd. to w. Mass., N. Y., 111., 

 Col., B. C., and northw. June-Aug. FIG. 365. 



19. C. foenea Willd. Culms slender and 

 lax, smooth except at tip, 3-9 dm. high ; leaves 



soft and loose, pale green or glaucous, mostly shorter, 2-4 mm. 

 broad ; inflorescence linear-cylindric or monilifonn, erect or 

 flexuous, of 4-9 globose or ovoid clavate-based appressed- 

 ascending whitish-green or silvery-brown spikes (6-10 mm. 



long) ; perigynia ovate, 3-4 

 mm. long, 1.8-2.2 mm. broad, 

 appressed-ascending, finally a 

 little spreading. Dry woods 

 and banks, Me. to B. C. and 

 Md. July. FIG. 366. Var. 866 ' c - foene - 

 PERPLEXA Bailey. Coarser, and often taller; 

 inflorescence heavier, mostly nodding, the 6-15 

 spikes larger (1-1.7 cm. long), the terminal 

 ones often crowded ; perigynia 

 3.5-4.4 mm. long. Com- 

 moner, Nfd. to Man. and Va. June-Aug. FIG. 367. 



20. C. LEPOR!NA L. Culms stiff and ascending, 2-8 dm. 

 high; leaves mostly short and firm, 1.5 4 mm. 

 broad ; inflorescence from subglobose to cylindric, 

 of 3-6 obovoid or ellipsoid approximate or sub- 

 approximate brown or ferruginous ascending 

 spikes (0.8-1.4 cm. long); perigynia S.S 4.5 mm. 

 long, 1.8-2.3 mm. broad, ascending. Dry hill- 

 sides, rocky banks, etc., local, Nfd. to Mass, and 

 N. Y. ; and occasional on ballast south w. June- 

 Aug. (Nat. from Eu.) FIG. 368. 



21. C. xerantica Bailey. Culms stiff, sca- 

 brous above, 3-6 dm. high ; leaves short, mostly near the base, 

 23 mm. broad ; inflorescence linear-cylindric, of 3-6 distinct 

 ascending ellipsoidal brownish-white spikes (8-13 mm. long) ; 

 89. c. xerantic*. perigynia appressed, 4-4.8 mm. long, 2-2.3 mm. broad, the inner 



867. C. foenea, v. perplexa. 



868. C. leporina. 



