(378) 



two rows of cells. Segments separated by mostly 2 well- 

 developed cilia. Spores .018 mm. (409). 



Hypnum Bcstii Renauld. Belt Mts., Essex, G. N. Ry., 

 Cut-bank Cr., Columbia Falls, 4,000 to 6,000 ft. (166, 410). 



Hypnum ochraccum Turn. Belt Mts., Two-medicine Lake 

 and Forty-mile Cr., Blackfeet Ind. Reservation, Macdonald 

 Lake, Essex, G. N. Ry., Aug. The specimens are rather 

 more slender than the typical form (381). 



Hypnum scorpioides L. Columbia Falls (200, growing 

 in marsh, 438, in shallow water of lake. 



Hypnum robustum Hook. Columbia Falls (439). 



Hypnum cordifolium Hedw. Two-medicine Lake, Mac- 

 donald Lake (318). 



Hypnum giganteum Schimp. According to Limpricht the 

 typical form of this plant has long, erect stems, short branches 

 without branchlets and stem leaves averaging about 3 by 2 

 or 2^ mm. It is apparently the most commonly fruiting form. 

 Belt Mts. , Cut-bank Cr. , Columbia Falls, July (160). Variety 

 Jluitans Klinggr., much resembles Fontinalis antipyretica 

 gigantca and grows in similar situations to that, with leaves 

 up to 4^2 by 3 mm. From this remarkably large leaf there 

 are all intergradations down to leaves scarcely 1 mm. long, 

 the latter growing in hollows, some seasons filled with water, 

 at others wholly without standing water. Limpricht describes 

 var. brevifolium with leaves nearly uniform in size on the 

 stems, often almost round and 1 l / 2 to 2 mm. long. This evi- 

 dently is the same as H. cyclophyllotum Holzinger, described 

 three years earlier and I include Montana specimens under 

 this name. 



Hypnum giganteum cyclopJiyllotum (Holzinger). Here 

 might well be placed all the shorter, more or less round- 

 leaved forms, with leaves varying from 1 to 2 mm. in length 

 and often nearly or quite as broad. Columbia Falls, margin 

 of pond, July (263). 



Hypnum giganteum dendroides Limpr. Plants with lower 

 branches often long, and all the branches with more or less 

 numerous branchlets. The stem leaves are comparatively 



