-48- 
The apothecia are small to medium in size, often very numerous, are 
sub-pedicellate with a dark reddish brown disk and a paler margin. 
Habitat trees and rocks ; very common in Canada and the United States. 
Leptogium tremelloides (L. fil. ) Fr. The thallus of this species is 
much like that of L. pulchellum , it is larger, with round, smooth, entire lobes 
which become crisped toward the center, and are covered more or less with 
concolorous granules, sometimes these are minute lobules. The color is 
somewhat lighter than that of L. pulchellum. The under side is the same 
color, and is wrinkled slightly. 
The apothecia are medium, disk a dark red, which becomes convex, the 
margin is very thin. 
Found in the Northern and Middle States on mossy rocks and on trees. 
Leptogium myochroum (Ehrh., Schaer.). Tuckerm. Plate VI. Fig. 5. 
Thallus rather large with broad, flat lobes which are very coriaceous and 
entire, often sooty looking toward the center. In color a dull green when 
fresh, turning mouse color when dry. The lobes of the under side are 
slightly concave and are a light gray, covered with a fine ash colored nap. 
The apothecia are rare ; they are medium and flat, almost sessile, with a 
reddish brown disk, the border rugose and sometimes hirsute. 
Found on trees and damp rocks ; quite common in the Northern States. 
In appearance C. fiacc-idum and L. myochroum are much alike, but the 
under side of the former is bare and in the latter it is velvety. 
NOTES ON NOMENCLATURE HI. 
Elizabeth G. Britton. 
Brachelyma robustum (Cardot). 
Cryphaeadelphus robustus Cardot. (Rev. Bry. 3:6-8, 1904). M. Cardot 
has recently described this new species collected by R. M. Harper in Georgia 
and referred Brachelyma subulatum Sch. to the same genus. 
He says of 'this new generic name that Muller had created it in 1851 in the 
second volume of the Synopsis Muscorum for Fontinalis subulata P. Beauv. 
as a subsection of the section Dichelyma of the genus Neckera. In the 
second edition of the Synopsis Muscorum Europaeorum, 1876, Schimper 
founded the genus Brachelyma for the same species. In his monograph of 
the Fontinalaceae in 1892, M. Cardot took up Brachelyma , but he states 
that this is an error, as according to the Paris Code, section 58, any subdivi- 
sion of a genus takes rank over a later published generic name. 
'This name, besides being much less desirable than Brachelyma , is 
entirely misleading in its suggestion of relationship and M. Cardot renders 
himself particularly liable to ridicule in view of the numerous sarcastic para- 
graphs published by him on nomenclature in his Revision of the types of 
Hedwig ! 
Papillaria nigrescens (Sw.) Jaeg. & Sauerb. 
In the Bryologist for March (1904) M. Cardot has failed to note that in 
the January number (p. 14) Louisiana was included in the range for this 
