147 
Type locality, Yellowstone National Park, Wyoming, Roll. 
Section B. Those with inmmersed stomata, 
*Brachytrichum. Capsules with 8-16 striz, anda more or less 
developed preperistome. 
I. Group oF O. CUPULATUM. 
Capsules immersed or more or less exserted. Rock species, 
rarely on trees. : 
This group has been discussed at length in two previous com- 
munications (Bull. Torr. Bot. Club, 20: 401-404 and 21: 1-4). It 
includes 3 Species with exserted capsules, 0. anomalum, O. sax- 
atile and O. nudum, and four with immersed, O. cupulatum, O. ur- 
mgerum, O. Porteri and O. Lescurii, of which the two latter have 
only been found in the Eastern States. Two poorly characterized 
varieties of O. anomalum have been recently added. 
19. ORTHOTRICHUM ANOMALUM. 
Type European. Occurs in the Eastern States from Pennsyl- 
vania to Ontario and the Canadian provinces, west to the Rocky 
Mountains. Not yet reported from the Pacific slope. 
Var. Americanum Vent. Macoun’s Cat. part 6: 86 (1892). 
Type localities, Distributed in Drummond's Mosses, No. 148. 
ab. upon rocks common,” and in Macoun’s Canadian Mosses 
No. 118 in part, on rocks along the shore of Lake Winnepegoosis, 
Manitoba and on bowlders and sandstone rocks, Hand Hills, Al- 
€rta, Macoun. 
This is very insufficiently described as “a form that has yellow : i 
capsules and differs considerably from the normal one in the well- _ - 
volute cilia.” I asked Dr. Venturi if it could be referred to : 
Orthotrichum saxatile (Lipr.), but he says this is only a variety eee 
€ven a form of OQ. anomalum, and is not the same as var. Ameri- — 
anum. “The characters indicated by Limpricht are not tenable. 
The size of the capsules and the leaves is relative, and the number 
f ridges on the capsule is variable. I have seen one see = 
“apsule with intermediate ridges and the other without them. 
We have: compared Drummond’s No. 148 with No. 181 of 
Rabenhorst’s Bryotheca Europza, cited by Limpricht in his Laub- 
_ Moose under O. anomalum, and with specimens of this species sent 
. to Dr, Torrey by Greville, ‘from Scotland. We cannot find any 
‘i 
