-49- 



but slightly sinuous walled when filled with chlorophyl, later on 

 the walls become distinctly sinuous both above and below. 



"Apparently dioicous; fruit unknown." 



Growing on shaded perpendicular walls, partly calcareous, in 

 rather dry places. Collected for several seasons in Bad Rock 

 Canon, Flathead river, Mont. 



Dedicated to Mrs. E. G. Britton. 



Grimmia (Eugrimmia) Tenuicaulis, R. S. Williams, 1. c. pi. 20. 



"In compact tufts up .to 6 cm. high. Stems very slender, 

 often threadlike, with few simple, mostly short branches; peri- 

 chatial and upper stem leaves rather broadly ovate-lanceolace, 

 concave, revolute on the borders, blade \\ mm. long, with rough 

 hair point about \ blade in length, the papilL-e of point spreading, 

 often recurved; moistened leaves erect-spreading; upper cells ir- 

 regular, somewhat transversely or vertically elongated, mingled 

 with rounded cells 0.004.006 mm. in diameter; cells toward base 

 more or less elongated rectangular, those near margin from 

 nearly quadratic to twice longer than broad, toward costa becom- 

 2-4 times longer than broad; cells apparently never sinuose 

 walled ; occasionally the leaf is hyaline nearly \ down from apex, 

 the hyaline cells alwavs elongated; evidently dioicous; sporo- 

 phyte not seen." 



"Type from near Neihart, Belt Mts., Mont, Sept. 21, also, 

 obtained at Marsh Lake and Dawson on the Yukon River." 



The above descriptions are slightly abreviated from the 

 original. — A.J. G. 



RECENT LITERATURE RELATING TO NORTH AMERI- 

 CAN MOSSES. 



MJULE^ CARDOT, the well-known French student of 

 mosses, has recently rendered a great service to Ameri- 

 can bryology in examining the types of Hedwig and 

 Schwsegrichen, which are preserved in the Boissier Herbarium.* 

 One of the greatest stumbling blocks to American students is the 

 uncertainty as to what the types may be, for they are often in 

 European herbaria accessible only to the man who can afford to 

 cross the Atlantic. We hope Monsieur Cardot will not stop here, 

 but will go on and look up other American types stored in foreign 

 museums. The types of the late C. Miiller will afford an interest- 

 ing and profitable study. We present below some of the most 

 important of M. Cardot's conclusions: 



Barbula acuviinaia YieAw.=B. fa/la.i Hedw. 



B. lanceolata Hedw. is a form of B. tDiguiculata Hedw., as 

 also is B. strict a Hedw. 



* Etude sur la Flore Bryologique de L'Amerique Du Nord. From Bull. 

 Herb. Boissier 7: 300-380, iSgg. 



