T. Hoi in— Studies in the Cyperacece. -±91 



to the leaf the structure agrees best with that of C.ferruginea, 

 in which a typical palisade-tissue is developed ; but while all 

 the species examined possess an isolated strand of stereome in 

 the leaf-margin, this was not observed in C. petricosa. The 

 free position of the stomata being level with epidermis and 

 not covered by papillae is a structure which seems to be fre- 

 quent among the Stenoca/rpm even if most of these are inhabit- 

 ants of dry soil among rocks; we have shown in the paper, 

 cited above, how very little may be depended upon the struc- 

 ture of the stomata as indicating the nature of the habitat. 

 Moreover, this same free position of stomata was, also, observed 

 in C. rvpestris, which, as stated above, was found associated 

 with C. petricosa. 



Carex mirata Dew. 



In a preliminary synopsis of Xorth American Carices Pro- 

 fessor Bailey* has referred this species to C. aristata R. Br., 

 and in a subsequent paper by this same authorf no further 

 mention is made of this particular species. But we find in 

 the latter of these publications a new species called C. exsic- 

 cata Bail., said to be a near ally of C. vesicaria L., though "in 

 some of its forms strongly suggestive of C. triclwcarpa Mnehl, 

 var. aristata (R. Br.) Bail." No diagnosis is given, only the 

 brief remark that C. exsiccata " differs at once from C. vesi- 

 caria by its greater size and broader leaves, thicker and more 

 nearly sessile spikes, and particularly by the much longer, 

 lance-ovate, scarcely inflated, duller and strongly nerved peri- 

 gynium, which is three to four times longer than the very 

 narrow and muticous scale," besides, as stated above, that it 

 suggests C. aristata R. Br. ; some varieties of C. vesicaria : 

 globosa Olney, major Boott and lanceolata Olney are referred 

 to this new species (C. exsiccata) as synonyms. 



Since then no suggestion has been offered as to the validity 

 of Dewey's species, and the fact that Professor Bailey failed 

 to append a diagnosis to his new species (C. exsiccata), would 

 naturally result in a possible confusion of both species, since 

 Dewey's diagnosis calls for a plant which is not so very remote 

 from C. vesicaria. Some few years ago, when the writer was 

 engaged in the preparation of a paper on " Greges Caricum," 

 Professor C. Piper kindly called our attention to the fact 

 that Dewey's diagnosis was very well applicable to a number 

 of authentic specimens of 0. exsiccata Bail. 



Carex mirata was first described in Wood's Botany (1848\ 

 and although CareyJ had not seen the plant, he nevertheless 

 recognized it as a distinct species, placing it between C. Pseu- 

 docyperus L. and C. hystricina Willd., quoting Dewey's diag- 

 nosis, and giving the geographical range as : Shore of Lake 



* Proceed Am. Acad, of Arts and Sci. p. To, 1886. 

 •fMem. Tovr. Bot. Club, 1. c. d. 6. 



% Gray's Manual, New York, p. 531, 1857 



