Rbodora 
JOURNAL OF 
THE NEW ENGLAND BOTANICAL CLUB 
Vol. 14. July, 1912. No. 163 
THE GENUS AMELANCHIER IN EASTERN NORTH 
AMERICA. 
Kk. M. WIEGAND. 
(Plates 95 and 96.) 
Ir is with some hesitation that the writer attempts a treatment 
of a genus which in the past has been subject to so much difference 
of opinion as has Amelanchier. His only excuse is that field and her- 
barium studies covering in a general way a period of sixteen years, 
but more especially of four years, have led him to conclusions in 
regard to specific identity, relationship, and nomenclature which differ 
rather widely from those generally accepted at present. 
Between the years 1895 and 1898 the writer made a serious study of 
the shad-bushes of Central New York with the expectation that the 
results would be published at once; but on more extended study in 
herbaria the classification based on the local work was found to accord 
so poorly with what existed elsewhere that the idea of immediate 
publication was given up. Recent field work in eastern Massachusetts 
and also in Newfoundland, where the genus is especially well repre- 
sented as to individuals, has revived interest in this problem, and much 
of the writer's spare time throughout the past year has been again 
devoted to Amelanchier. During the summer of 1911, in company with 
Prof. M. L. Fernald and Mr. E. B. Bartram, he collected in Newfound- 
land about 132 numbers of Amelanchier. This material, together 
with that in the Gray Herbarium, kindly placed at the writer's disposal 
by those in authority, and the material in the Herbarium of the New 
England Botanical Club, has furnished the immediate basis for this 
