201004 Snow Trillium (Trillium grandiflorum) - USDA NA Distribution Map
201004 Snow Trillium (Trillium grandiflorum) - USDA NA Distribution Map.jpg
USDA, NRCS. 2019. The PLANTS Database (http://plants.usda.gov). National Plant Data Team, Greensboro, NC 27401-4901 USA.

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