Published in Journal of The Arnold Arboretum, in 1962, in volume 43, issue 1, pages 94-107

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

Published in Mitteilungen der Botanischen Staatssammlung München, in 1963, in volume 5, pages 645-651

Created: 2016-08-29, modified: 2016-08-29