U40 



lected on the island of Sachalin and in eastern Russia (75 1 ). 



Hypnum circinale Hook. Canon City, Dyea Creek. In 

 good fruit March 28, on trees. Common at Skagway on 

 fallen logs. These specimens are dioicous with antheridial 

 flowers more or less clustered on the stems. The annulus is 

 simple, composed of pale cells slightly cohering. Median 

 cells about .004 by .055 mm. Alar cells forming an inflated 

 cluster. Spores rough, up to .016 mm. (752). 



Hy-pnum revolutum (Mitt.) Lindb. (H. plicatile Mitt.) 

 Lake Lindeman and Lake Marsh. Medium leaf-cells .005 

 mm. wide and up to about .040 mm. long, the majority of 

 cells, however, up to .025 or .030 mm. long. Numerous short 

 often nearly square alar cells with usually a few hyaline, 

 somewhat enlarged cells in angles. In cupressiformc the 

 median cells are about twice longer (757). 



Hypnum cupressiforme brevisetum Schimp. Lake Marsh, 

 on rock. The sterile specimens referred here possibly be- 

 long elsewhere, yet they come very close to this variety, 

 differing principally from the species in the leaves being 

 straighter, rather shorter and with somewhat shorter leaf- 

 cells (758). 



Hypnum Vaucheri Lesq. Dawson at base of tree. This 

 species is dioicous. The leaves are entire, with flat borders. 

 Cells in angles small, roundish or nearly square, extending 

 up for a distance of 10 or 12 cells and in toward costa about 

 the same amount. Median leaf-cells about .004 by .030 to 



.040 mm. (755). 



Hypnum Lindbergii datum Schimp. Lake Lindeman, 

 in swamps. The specimens referred here have rather longer 

 pointed leaves than the type with leaf-cells also longer and 

 narrower, the median cells measuring about .004 by .080 mm. 

 The stem leaves are entire, flat bordered, not decurrent with 

 a convex cluster of more or less inflated alar cells, either pale 

 or colored. Stem sections oval, .280 mm. long, the outer 

 row of cells thin-walled, the next 2 or 3 rows thick-walled, 

 with central strand well developed, of 10 or 12 small cells 

 (761). 



