OF ARTS AND SCIENCES. 151 



pressed perigynia. From var. cdata it is distinguished by the stiff 

 culm, the more aj^pressed and narrower spikes wliich are mostly nar- 

 rowed below, and the narrower appressed perigynia. — Along the coast 

 from New Brunswick to Mexico. 



Var. foenea forms a transition to C. trihuloides. Vars. alata^ 

 fcenea, mixta, and moniliformis form a sub-species which is distin- 

 guished from other varieties by the green or silvery aspect of the 

 spikes. Although extremes of all these varieties appear to be re- 

 markably distinct from C straminea, I am yet unable to trace a single 

 character which has any permanence. In fact, the intermediate forms 

 which I cannot refer satisfactorily to any variety are as numerous as 

 the types. The distinctions between vars. alata and foenea are espe- 

 cially inconstant. Var. mixta, when better known, may be found to 

 possess specific characters. 



Var. MIXTA. 



C. lagopodioides, W. Boott, Bot. Calif, ii. 237. 



O. adusta, W. Boott, 1. c. 238. 



O. cristata, var. mirabilis ? W. Boott, 1. c. 



G. scoparia, yar. fidva, W. Boott, 1. c, in part. 

 Culm stout, longer than the leaves : spikes silvery, ovoid, not often 

 conspicuously narrowed below, approximate: perigynium much smaller 

 than in the species, silvery green, nerved, narrowly but conspicuously 

 winged. Runs into many forms, some of which bear small and much 

 crowded spikes. The Pacific coast representative of YSiV.foetiea. Its 

 characters are imperfectly determined. — California, Bolander 50, 

 3864, 6216, Brewer 1642, part of Torrey's 551 from near Merced 

 River, Summit Camp, Kellogg, Bigelovj's specimens which were dis- 

 tributed as G. lagopodioides, San Bernardino, Parish, Hillehrand 

 2305, 2317 ; Oregon, Hall 589. 



Var. MONILIFORMIS, Tuckerman, Enum. Meth. 17. 



G. adusta, Carey, Tuckerman, et al., not Boott. 



G. fcenea, var. y, Boott, 111. 118, t. 377. 



G. foenea, var. (?) sahulonum, Gray, Man. 5th ed. 580. 



G. silicea, Olney, Proc. Am. Acad. vii. 393. 



G. straminea, var. silicea, Bailey, Carex Cat. 

 Spikes five to eight, silvery, all distinct and conspicuously narrowed 

 below (clavate) , disposed in a loose and slender mostly nodding head : 

 otherwise nearly like var. foenea. Transition to G. adusta. Several 

 diffeient plants were early distributed as var. moniliformis, but a re- 

 cent letter from the late Prof. Tuckerman says that the variety was 



