201004 Red Trillium (Trillium erectum) - USDA MI Dsitribution Map
201004 Purple Trillium (Trillium erectum) - USDA MI Dsitribution Map.jpg
USDA, NRCS. 2017. The PLANTS Database (http://plants.usda.gov). National Plant Data Team, Greensboro, NC 27401-4901 USA.

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