(353) 



Dichodontium jiavescens (Dicks.) Lindb. A common spe- 

 cies in the Rocky Mts. of northern Montana, on wet rocks 

 about falls and along streams. Distinguished from any form 

 of pellucidtun by the leaves comparatively smooth above and 

 teeth of the margin separated by 3 to 5 or more intervening 

 cells. In the preceding, each marginal cell forms more or 

 less of a tooth in the upper part of the leaf (269). 



Dichodontium jiavescens jlnitans n. var. A dark colored 

 plant growing on rock under water with stems up to 10 cm. 

 long. Columbia Falls (326). 



Dicranella crista (Ehrh.) Schimp. Specimens mostly 

 dioicous. Occasionally a $ flower is borne on a branch of 

 the fruiting plant. Nyack and Essex, G. N. Ry., Aug. (236). 



Dicranella Schreberi (Swartz) Schimp. Borders of 

 marshes, Columbia Falls. Sterile tufts up to 5 or 6 cm. high 

 grow by the side of much shorter fruiting plants, Sept. 

 (207). 



Dicranella Grevilleana (Br. &Sch.) Schimp. Specimens 

 dioicous or mostly so. The species may be known by its re- 

 curved leaves, the scarcely elongated, parenchymatose cells 

 of the exothecium and capsule furrowed when dry. Essex, 

 G. N. Ry., Aug. 19 (376). 



Dicranella subulata (Hedw.) Schimp. Essex, Aug. 24 



(375); 



Dicranella varia (Hedw.) Schimp. Along rivers and 



about springs on wet sand. Tenderfoot Cr., Belt Mts., Co- 

 lumbia Falls, Oct. and May (134). 



Dicranum Starkei Web. & Mohr. Summit, G. N. Ry., 

 5,000 ft.; Macdonald Lake, 4,500 ft., Aug. 18 (237, the 

 common form, 324, a taller form). 



Dicranum hispidulum n. sp. (Plate 34.) 



Monoicous, perigonium close under the perichaetium, of 

 4 or 5 broad, more or less pointed leaves mostly costate. In 

 compact tufts much like the smaller forms of D. Starkei. 

 Stems usually without radicles and few branches, up to 2^ 

 cm. high, the cross-section nearly round, .180 mm. in di- 



