T. Holm — Studies in the Cyperacece. 305 



The systematic position of this species seems naturally . to be 

 among the Micro rhynchce, but as a deviating type on account 

 of the excurved beak of the perigynium, and if it were not for 

 the distinct marginal denticolation of the perigynium and its 

 slender shape the species would resemble C. scopidorum to 

 some extent. A perigynium of this kind is somewhat unusual 

 within the representatives of the grex, but is, as we remember, 

 very characteristic of the Spirostachyce ; in these, however, the 

 beak is generally "bifid and more distinctly differentiated from 

 the body. The species may be placed next to C. scopidorum. 



Carex cryptochlama sp. d. (fig. 16). 



Rhizome csespitose with purplish, persisting leaf -sheaths ; 

 leaves about half as long as the culm, broad (about l CIJl ) and 

 flat, glabrous except along the margins ; culm from 70 to 90 cm 

 in height, erect and stiff, triangular, scabrous along the edges, 

 phyllopodic ; spikes from 4 to 7, the terminal and frequently 

 the uppermost lateral staminate, the others pistillate or andro- 

 gynous, contiguous or the lower ones remote, sessile or short- 

 peduncled, erect or spreading, seldom nodding, dense-flowered, 

 subtended by sheathless, foliaceous, broad bracts of which the 

 lower ones exceed the inflorescence; scale of staminate spike 

 elliptical-oblong, acute, light reddish-brown with pale midvein ; 

 scale of pistillate spike lanceolate, sharply pointed, deep pur- 

 plish with broad, greenish midvein, exceeding the perigynium ; 

 perigynium almost sessile, erect, broadly elliptic to roundish, 

 nerveless, pale green, granular, sparingly denticulate near the 

 minute, entire beak ; stigmata 2. 



Alaska : Kussiloff, on sands with Elymus, collected by Dr. 

 Walter II. Evans, July, 1898 (No. 618), and Seldovia near 

 mouth of Cook inlet by Prof. C. Y. Piper, August, 1904 (Nos. 

 4818 and 4819). 



This species is somewhat remarkable on account of its resem- 

 blance to Carex cryptocarpa, so far as concerns the structure 

 of the spikes, the deep-purplish, lanceolate scales and the broad 

 pale-green perigynia. But it shows, on the other hand, a strik- 

 ing contrast to this species, C. cryptocarpa, not only by the 

 almost sessile and mostly erect pistillate spikes, but also by its 

 very broad leaves, the basal and the bracts. Habitually the 

 species does not resemble C. c?yptoca?pcc, but, to some extent, 

 Drejer's C. hcematolepis or certain very robust forms of C. 

 salina / it appears, however, to be distinct from these, and as 

 a type intermediate between the true Salince and 0. crypto- 

 carpa Mey. 



Carex luzulwfolia W. Boott var. strobilantha nob. (fig. 18). 

 Taller and more robust than the typical plant ; the spikes 

 thick and very compact-flowered ; scales of staminate and pistil- 



