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M.V. Walcott, N. Amer. Wild Fl., vol. 4 : p. 0, t. 0, fig. 0 (1925-1927) [81]
Illustration contributed by:
Smithsonian Institute, Washington, D.C., U.S.A.
M.V. Walcott, N. Amer. Wild Fl., vol. 4 : p. 0, t. 0, fig. 0 (1925-1927)
