CONTRIBUTIONS FROM THE GRAY HERBARIUM OF HARVARD UNIVERSITY.— NEW SERIES, NO. XLIV. THE GENUS EUPHRASIA IN NORTH AMERICA

M L Fernald
K M Wiegand

Published in Rhodora, in 1915, in volume 17, issue 202, pages 181-201

Date published:1915

JSTOR: 23298418
BHL: 567660
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