(Fax ) 
up to } the segments in length, they are separated by spaces 
up to 4 the width of the teeth across. Apex of teeth often 
split or perforated by a single opening. The minutely 
roughened spores measure up to .048 mm. (637). 
Meesea triguetra(L.) Aongstr. (Messia tristicha B. & S.) 
Klondike River bottom. In fine fruit July 23 (639). 
Paludella squarrosa (lu.) Brid. Sterile specimens grow- 
ing in bogs at Lake Lindeman. Found abundantly in fruit 
at Dawson July 23, growing in large patches many feet 
across. In places, specimens were so mixed with Campto- 
thecium nitens that only the tall seta and capsule of sguar- 
rosa were visible (640). 
Leptobryum pyriforme (L.) Schimp. Lake Lindeman 
and Dawson (641). 
Pohlia nutans (Schreb.) Lindb. (Webera nutans (Schreb.) 
Hedw.) Sheep Camp, Dyea Creek, also on an island just 
below Fort Selkirk (642). 
Pohlia nutans var. (Webera nutans var.) Lake Linde- 
man. These specimens are dioicous with appendiculate 
cilia and costa rough on the back above by the projecting 
upper ends of the cells. P. nutans longiseta is described as 
having a rough costa, but it has a seta 3 or 4 times longer 
than these specimens. Limpricht states it attains a height of 
10cm. Ihave Montana specimens of zwtans with paroicous 
inflorescence, seta 2 or 3 cm. high and costa slightly rough 
on back above, also specimens with seta 6 cm. high and costa 
smooth (643). 
Pohlia cruda (.) Lindb. (Webera cruda (L.) Schimp.) 
Lake Lindeman (644). 
Pohlia sphagnicola (Brid.) Lindb. & Arn. (Webera 
sphagnicola Schimp.) Dawson. In fine fruit July 2. 
Growing with slender, mostly solitary stems up through 
tufts of Sphagnum and Aulacomnium. 'The specimens are 
paroicous not dioicous as usually described, with leaves 
mostly flat-bordered and entire except a few of the elongated 
perichaetial, which are slightly serrulate near apex. It is 
undoubtedly closely related to mutans, differing chiefly in the 
