Atamosco atamasco
Illustration by Mary Vaux Walcott. North American Wild Flowers. Washington, 1925.
Gentiana holopetala
Illustration by Mary Vaux Walcott. North American Wild Flowers. Washington, 1925.
Gentiana autumnalis
Illustration by Mary Vaux Walcott. North American Wild Flowers. Washington, 1925.
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