(354) 



ameter, with distinct central stand and outer cells with but 

 slightly thickened walls. Leaves spreading all round, 

 rough on back and margins above with irregular, mamillate 

 papillae, ovate-lanceolate, i^-mm. long, cross-sections 

 showing no stereid band or distinct guide cells, the cells on 

 either side of costa near middle of leaf often doubled for five 

 or six rows outward. Costa excurrent, usually .040-. 050 

 mm. wide at base and .050-. 080 mm. above. Leaf-cells 

 scarcely elongated and irregular in upper part, median cells 

 .010 mm. wide and .010-. 020 mm. long, alar cells form- 

 ing a distinct group of somewhat enlarged, nearly square or 

 inflated more or less colored cells. Cell walls not pitted or 

 distinctly thickened. Capsule oval, slightly curved before 

 opening and barely strumose, 1*4 mm. long without lid. 

 Lid obliquely rostrate, about }{ mm. high. Exothecal cells 

 rectangular, 2-4 times longer than broad. Well developed 

 annulus of 2 or 3 rows of cells. Teeth split to below the 

 middle. Smooth spores up to .012 mm. 



This species is somewhat intermediate between H. Starkei 

 and Il.falcatum. It differs from both in the leaves being 

 only half as long and scarcely falcate or secund. The first 

 also has leaf-cells with thickened and pitted walls and cells 

 twice longer, while the second has a poorly developed an- 

 nulus, alar cells less distinct, and the exothecal cells shorter 

 and broader, from roundish to one and one-half times longer 

 than wide. Collected at head of Macdonald Lake, Aug. 3, 

 1895, with capsules not quite nature (323). 



Dicranum flagellar e Hedw. On decayed logs, appar- 

 ently rare in Montana. Columbia Falls, Oct. 8 (35). 



Dicranum elongatum Schleich. In crevices of slide rock. 

 April and May, Columbia Falls (222). 



Dicranum fuscescens Turn. Common at the base of trees 

 and on old logs. Belt Mts., Upper Sun River, Columbia 

 Falls, Aug. 30 (197). 



Dicranum congcstum Brid. On rocks, Sept., Columbia 

 Falls (442). 



Dicranum Muhlenbeckii Bry. Eur. On rocks, July 24, 

 Bad-rock Canon near Columbia Falls (196). 



Dicranum scoparium (L.) Hedw. Common Belt Mts., 

 Columbia Falls, Oct. and May (28). 



