IRbodora 
JOURNAL OF 
THE NEW ENGLAND BOTANICAL CLUB 
Vol. 17. December, 1915. No. 204. 
RANGE EXTENSION OF CEANOTHUS SANGUINEUS. 
OLIVER A. FARWELL. 
In the Synoptical Flora and in Piper’s Flora of the State of Washing- 
ton the distribution of Ceanothus sanguineus, Pursh is given as from 
Brit. Columbia to N. California and Idaho. Howell gives the same 
rang? but extends it eastward to Montana. Rydberg, in the Flora of 
Montana, says it occurs only on the western slope of the main range 
of the Rocky Mountains. Coulter’s Manual, 1st. Ed., credits it to the 
region of the Missouri and its tributaries but it is not given a place 
in the 2nd. edition. Pursh, who first described it from material 
collected by Lewis, gives it as “Near the Rocky Mountains, on the 
banks of the Missouri"; in so far as this statement by itself is con- 
cerned, it might mean either the eastern or western slope of the Rockies 
or bcth; I have not access to any records that might determine the 
point in question. The plant, however, has been considered to belong 
exclusively to the northwestern region west of the main range of the 
Rocky Mouritains. Its discovery, therefore, in the Keweenaw Penin- 
sula, in Michigan, is of more than local interest. I first collected it in 
fruit in August, 1886, near Copper Harbor. Atthat time, being young 
in years and botanical experience, my main object was to make each 
species I found agree with some one of those enumerated in Gray's 
Manual; so it naturally found a resting place in the species cover of 
C. Ainericanus where it remained forgotten until 1914. Having in 
that year had occasion to examine critically my material of the 
eastern species I at once observed that the Keweenaw plant was not 
C. Americanus. An investigation convinced me that it was either 
C. sanguineus or a new species. On a trip to the Lake Superior region 
