This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant mark

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant mark

Contains scientific contributions from the Missouri Botanical Garden and, from 1914-69, the Graduate Laboratory of the Henry Shaw School of Botany of Washington