( J 32) 



slightly elongated at right angles to the opening and the 

 leaves are rather larger and wider above with larger tells and 

 leaf base narrower (679). 



Timmia mcgapolitana Hedw. Marsh Lake and Klondike 

 River near mouth. This species seems to grow mostly on 

 rather dry earth at the base of rock ledges, usually at a some- 

 what higher elevation than the preceding. The capsule is 

 nearly straight and furrowed when dry, the exothecal cells 

 sinuous-walled and not elongated, the stomata oblong to 

 roundish, up to .072 mm. long and the leaf-base is usually 

 wider than above (678). 



Timmia Austriaca Hedw. Canon City, Dyea Creek and 

 Moose Creek just below Dawson. This species has the leaf- 

 cells somewhat angular above, as compared with the two 

 preceding species and vein more or less toothed dorsally to- 

 ward apex (680). 



Psilopilum arcticum Brid. Left bank of Klondike River 

 just below Bonanza Creek. On damp black soil of hillside. 

 Not fruiting (682). 



Pogonatum alpinum (L.) Roehl. Sheep Camp, Dyea 

 Creek and Lake Lindeman (683). 



Polytrichum gracile Dicks. Yukon River just below White- 

 horse Rapids (684). 



Polytrichum piliferum Schreb. Lake Lindeman (685). 



Polytrichum hyperboreum R. Br. Lake Lindeman. This 

 plant has a white hair-point like the preceding, but grows up 

 to 8 cm. high or more, with abundant branches. The hyaline 

 lower cells average somewhat narrower and about twice 

 longer than in piliferum. They are .008 to .012 mm. wide 

 and up to .160 mm. long (686). 



Polytrichum juniperinum Willd. Lake Lindeman (687). 



Polytrichum strictum Banks. Sheep Camp, Dyea Creek, 

 and Lake Lindeman (688). 



Polytrichum commune L. Lake Lindeman and Dawson. 

 At the latter place in fine fruit July 30 (689). 



Polytrichum inconstans Hagen. 

 Stems slender, up to 8 cm. high, rather uniformly leaved 



