Published in Journal of the Arnold Arboretum, in 1929, in volume 10, pages 169-174

Created: 2011-01-26, modified: 2023-02-16

Published in Journal of The Arnold Arboretum, in 1929, in volume 10, issue 4, pages 285-299

Created: 2016-07-07, modified: 2016-07-07