| J. Arnold Arbor., vol. 58 : p. 42 (1977) [P. Fawcett] [1] | |
| drawing: P. Fawcett [7] | |
| Illustration contributed by: | Missouri Botanical Garden, St. Louis, U.S.A. |
J. Arnold Arbor., vol. 58 : p. 42 (1977) [P. Fawcett]