Published in Journal of the Arnold Arboretum, in 1950, in volume 31, pages 39-80

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

Published in Journal of the Arnold Arboretum, in 1950, in volume 31, pages 81-116

Created: 2011-01-26, modified: 2014-08-30

Published in Journal of the Arnold Arboretum, in 1950, in volume 31, pages 137-171

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

Published in Journal of the Arnold Arboretum, in 1950, in volume 31, pages 214-240

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

Published in Journal of the Arnold Arboretum, in 1950, in volume 31, pages 241-263

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

Published in Journal of the Arnold Arboretum, in 1950, in volume 31, pages 405-429

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

Published in Journal of The Arnold Arboretum, in 1950, in volume 31, issue 4, pages 430-432

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

Published in Journal of The Arnold Arboretum, in 1950, in volume 31, issue 4, pages 437-447

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