230 Rhodora [DECEMBER 
early in July of this year (1915) I found the shrub in full bloom. It 
proved to be C. sanguineus. I examined a section of territory about 
half a mile long by as much wide and found the plant to be quite 
plentiful; the probabilities are that it may be found over a much 
larger area. It is found in rocky woods, the rock being of trap rock 
formation; the woods are mostly of evergreen trees but have a good 
sprinkling of oak, birches, willows, poplars, maples and other decidu- 
ous trees and shrubs. It is, of course, indigenous to this region. The 
possibilities of its having been an introduction from west of the Rockies 
are so remote as to be negligible. Plants from the eastern slope of 
the Rockies might be introduced to the Lake Superior region by way 
of the rivers and streams which find an outlet through Lake Winnipeg, 
Winnipeg River, the Lake of the Woods, Rainy Lake River, and Pigeon 
River to Lake Superior but this line of travel would not transport the 
seed of a plant from the western slope, nor would the Missouri carry 
the seed from that region to Lake Superior. The same remarks apply 
to another plant, the Mimulus moschatus, Dougl., which is native 
to the same regions; it may have been introduced further east as an 
escape from cultivation but the argument will not apply here, since, 
so far as I have been able to learn, it was never cultivated in the 
Copper district of Michigan unless gathered for the purpose from the 
local native plant. 'The only probable explanation of such widely 
separated stations is that the species in preglacial times were more 
generally distributed but that the ice of the glacial period destroyed 
intermediate stations. 
DEPARTMENT OF Botany, 
Parke, Davis & COMPANY, 
DETROIT, MICHIGAN. 
