316 T. Holm — Studies in the Cyperacece. 



is the so-called C. obnupta Bail., of which Mr. J. "W. Congdon 

 has sent us very fine material collected in swamps, Mendocino 

 County, and they all answer the diagnosis of C. Sehottii very 

 well, but seem distinct from the little that we know of Dewey's 

 C. Barbara*. (Fig. 10 = scale of pistillate spike ; fig. 11 = 

 perigynium, both of C. Sehottii.) 



Carex magnified Dew. 



Through the kindness of Mr. Clarke we have learned that 

 most of the specimens of so-called C. Sitchensis belong to this 

 unpublished species of Dewey, who sent it to Boott. The 

 real C. Sitchensis is a very different plant with slender and 

 remote pistillate spikes, of which we have studied authentic 

 material in the herbarium of Bischoff, which is now in the 

 possession of the St. Louis botanical garden. This species, C. 

 Sitchensis Prescott, is known from the coasts of Alaska and 

 Oregon, and has been described as C. Howellii Bail. 



Mr. Clarke, furthermore, states that Boott's plate 594 (C. 

 laciniata), as to the plant depicted, represents 0. Sitchensis 

 Presc. vera, while the details are taken from the old, true C. 

 laciniata. Identical with C. Sitchensis Presc. are, also, C. 

 cryptocarpa Franch. and G. atrata Hook et Arn. 



Carex lacunarum sp. n. (figs. 12-13). 

 Boots thick, very hairy; rhizome csespitose with persisting, 

 reddish brown leaf -sheaths ; leaves as long as the culm, rela- 

 tively narrow, carinate, glaucous and very scabrous ; culm about 

 60 cm in height, coarse, triangular, scabrous, phyllopodic ; spikes 

 three to five,* the terminal and uppermost lateral staminate, 

 the others pistillate or androgynous, more or less contiguous, 

 sessile or the lower ones peduncled, nodding, cylindric, very 

 dense-flowered, from 2 to 8 cm in length, subtended by bracts 

 with blades longer than the inflorescence (fig. 12), sheath less 

 or the lowest one wit;h a short sheath ; scale of staminate flower 

 lanceolate, erosely denticulate above, three-nerved, pale pur- 

 plish with hyaline margins and base : scale of pistillate flower 

 (fig. 13) broadly ovate, acuminate, mucronate to aristate, erosely 

 denticulate above, three-nerved, purplish brown with hyaline 

 margins ; perigynium (fig. 13) longer than the body of the scale, 

 sessile or nearly so, erect, rhombic-oval, biconvex, coriaceous, 

 two-nerved, slightly denticulate along the upper margins, other- 

 wise glabrous, pale brown, the beak short, entire; stigmata 

 two. 



* As to the number of spikes, staminate and pistillate, we notice in : 

 7 specimens 2 staminate spikes. 

 2 " 1 



4 " 3 pistillate " 



5 " 2 " " 



