Contains scientific contributions from the Missouri Botanical Garden and, from 1914-69, the Graduate Laboratory of the Henry Shaw School of Botany of Washington University.
The January number of each volume contains the annual reports of the officers of the board and the director, 1913-<1977>; the annual reports are issued as the May issues of each volume, <-1987>.
Vols. for 1869-1952 include Extracts from the proceedings of the Royal Horicultural Society.
Vols. for 1846-55 include Proceedings at meetings of the society.