ae granite ledges, as this verety. 
148 
constant differences. The leaves are identical, so is the size of 
the capsules and length of the seta. The striz are known to be 
variable. They are more prominent in Greville’s specimen than 
in Drummond’s, and less so in No. 181. The preperistome is hard 
to see in all three. We are not sure that we distinguished it. The 
base of the teeth appears more roughly papillose and less striate ; 
there were no cilia present. 
We asked Dr. Venturi to tell us what he considered the main 
difference in var. Americanum., and he replied (Nov. 30th, 1893) 
that he cannot find a scrap of it nor a drawing of the peristome, 
and doés not remember giving the varietal name, and therefore 
cannot give us the information required. We have been favored 
with specimens by Prof. Macoun of his No. 872a, from Lake Win- 
nepegoosis, July 6th, 1882, and three other specimens from Ontario 
and Saskatchewan. The ones from Lake Winnepegoosis have the 
three or four lower joints of the teeth much thickened and yellow, 
with large conspicuous ridges; the preperistome is very distinct, 
and there are no cilia. There are 12 striae on one capsule, that 1s 
the secondary ones were absent in four spaces. 
Var. Venturi (Kindb). 
O. Venturi Kindb. Mac. Cat. part 6: 87 (1892). Canad. Mosses, 
No. 455, non DeNot. Ms 
There is another contradiction here. The Catalogue says: 
«On conn eae occidentalis) rails, Simon Terrill’s farm, Brighton, 
Ontario ;” and the label of No. 455 reads: “ On sandstone bowl 
ders, Belleville,” Ontario.’”” There is no description. 
20. ORTHOTRICHUM NUDUM Dicks. a 
Type European. We have no American station for this 
species. 
Var. Rudolphianum (Schimp.) Vent. 
We note that Venturi maintains this as a variety, and Limp- 
richt unites it with the species. Macoun’s Catalogue cites the 
variety as coliected by Drummond “ on rocks near the Whirlpool, 
below Niagara Falls; also along Kootenai Lake, British Colum- — 
bia.” Dr. Venturi has recently determined specimens collect : 
by R. S. Williams, No. 59, at Great Falls, Montana, and No. 185 
collected by J. B. Leiberg, at Lake Pend d’ Oreille Hes Bie a 
