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<p>This image is not copyrighted and may be freely used for any purpose. Please credit the artist, original publication if applicable, and the USDA-NRCS PLANTS Database. The following format is suggested and will be appreciated:</p> <p>USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. <

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Supplier: USDA NRCS PLANTS Database

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 2: 467.

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