PTARMIGANBERRY 
Arctous alpina (Linnaeus) Niedenzu 
This dwarf shrub of the Heath Family is a colorful plant in 
autumn when its leaves turn crimson and it is decorated with ted 
berries. Growing flat on the ground, it makes brilliant patches of 
color under the willows, aldets, and scrub pines which form open 
thickets over the shaly flats deposited by glacial streams. By some 
authorities the red-berried form here pictured is separated as a vatiety 
from the more widespread black-berried one. Under the name Arcrous 
enythrocarpa ot Arctous alpina rubra, the ptarmiganberty grows at high 
altitudes in widely separated districts of Maine, New Hampshire, and 
Greenland, and from British Columbia to Alaska. It occuts also in 
Europe and Asia. 
The plant was especially beautiful in Douglas Canyon Valley, 
which leads from Red Deer River Valley, fifty miles by trail north 
of Lake Louise, Alberta, where we found it at an altitude of 6,000 
tect: 
PLATE 355 
