Gaillardia aristata
Illustration by Mary Vaux Walcott. North American Wild Flowers. Washington, 1925.
Penstemon hybridum
Illustration by Mary Vaux Walcott. North American Wild Flowers. Washington, 1925.
Yucca baccata
Illustration by Mary Vaux Walcott. North American Wild Flowers. Washington, 1925.
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