230 
Schimper himself indicated clearly on his labels that he did not 
consider it a good species; Drummond’s no. 222, on which this 
species was founded, is evidently somewhat mixed, as the Colum- 
bia Herbarium specimen is P. zutricata. 
Ia. PYLAISIELLA POLYANTHA JAMESII (Sull.) E. G. Britton. 
Pylaisia Jamesii Sull. & Lesq. Musc. Bor. Am. Ed. 2. 383. 1865. 
Pylaisia subdenticulata obscura Lesq. & James, Mosses N. A. 
309. 1884. 
Gametophyte smaller than the type; leaves shorter, broadly 
ovate-lanceolate, shortly bicostate ; length of leaf-cells 4-6 times 
their diameter; quadrate alar cells numerous; perichaetial leaves 
shorter, abruptly acuminate. 
Sporophyte with shorter subulate-lanceolate péristomal teeth, 
which are also shorter than the segments. 
On the ground and roots of trees. Chelsea, Mass. ( James.) 
This variety has the appearance of P. sudbdenticulata because 
of its reduced size, otherwise it has the characters of American 
polyantha, such as conic operculum and rudimentary cilia. 
Ib. PYLAISIELLA POLYANTHA PSEUDO-PLATYGYRIA (Kindb.). 
Pylaisia pseudo-platygyrium Kindb.; Macoun, Cat. Can. Pl. 6: 
£7.43... Poon. 
Pylasia filari-acuminata Kindb. 1. ¢. 174. 
Leaves narrowly long-acuminate; upper branch leaves distantly 
serrate-dentate along sides of acumination; inner perichaetial 
leaves often long-acuminate, serrate-dentate along the acumina- 
tion ; cilia 1 or 2, better developed than in the type. 
Type locality, shores of Lake Nipigon, Ontario. Also found 
on the west side of the Columbia River, at Revelstoke, B. C. 
On decayed trunks and on “ logs subject to inundation.” 
Exsiccata: Macoun, Can. Musc. 626. (Py/aisia filari-acuminata.) 
2. PYLAISIELLA SUBDENTICULATA (Schimp.) Kindb. Can. Rec. Sci- 
1894: 22. 
Pylaisia subdenticulata Schimp. Bry. Eur. fasc. 46 and 47- 
1851. 
Pylaisia denticulata Sull. in A. Gray, Man, Ed. 2, 62. 1856. 
New York and New Jersey (Austin); Maryland (Holzinger); Ohio 
(H. J. Biddlecome); Athens, Ill. (Hall). Very close to 2. 
