12 



bunchy head ; staminate spike small and sessile, usually partially 

 hidden in the head ; perigynium large and much inflated, con- 

 spicuously ascending. From this hop-headed form (whence its 

 name), which is comparatively uncommon, the species runs 

 almost imperceptibly into many more slender variations. Those 

 worthy of varietal distinction are as follows: 



Van Bella-villa. 



C. Bella-villa^ Dewey, Sill. Journ. (II.) xli. 229 (1866), v. s. 



C. liirida, var. divergens, Bailey, Proc. Amer. Acad. Arts and 

 Sci. xxii. 63 (1886). 



Plant much more slender; spikes scattered or remote, oblong 

 or cylindrical, loosely flowered and more or less staminate at the 

 apex ; perigynium much more slender and more gradually beaked, 

 more straw-colored, diverging at right angles; scales longer and 

 conspicuously awned. This singular plant has nearly as much 

 the aspect, in its spikes and perigynia, of C, folliculata as of C. 

 Inpulina^ and in my Synopsis I suggested that it may be a 

 hybrid of the two species. Professor Macoun states, however, 

 (Cat Can. PI. iv. 168, 1888), that " it cannot be a hybrid with 

 C. folliculata^ as that species has never been found within one 

 hundred miles of the locality." Near Belleville, Hastings Co., 

 Ontario, Macoun. 



Var. PEDUNCULATA, Dcwey, Wood's Bot. and Fl, iy6 

 (1870). 



C. folliculata, Lam., Diet. Bot iii. 391 (1789), v. s. Hb.. Lam. 

 C, gigantea, Rudge, Linn. Trans, vii. 99 f. 2 (1804), ^- s. Hb. 



Kens. 



J 



C, lupulina^ var. lo7igipedunctilata, Sartw. in herb.; Dudley, 



Cayuga FL, 119 (1886), v. s. Hb. Cornell. 

 C, hirida, WahL, var. polystachya^ Bailey, Proc. Amer. Acad. 



Arts and Sci. xxii. 6^ (1886), mostly. 

 Usually more slender than the species; spikes much narrower 



and smaller, {}4 to ^ in. wide and ^ to 2 in. long), more or less 

 scattered, a part or all of them peduncled, the lower ones some- 

 times long-exserted ; staminate spike usually conspicuous, often 

 long-peduncled ; perigynium usually smaller. A polymorphous 

 variety, more common than the species, extending from Canada 



