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Figure 4. Spotted joe-pye weed dendrogram. Unweighted arithmetic average clustering algorithm dendrogram (cophenetic correlation = 0.8996) of spotted joe-pye weed populations using Nei's genetic distance matrix. GFSP; Gooseberry Falls; HP, Holthe Prairie; LBSP, Lake Bemidji State Park; LLSP, Lake Louise State Park; OMSP, Old Mill State Park; PC, Prairie Coteau; POP, Pin Oak Prairie; RLPL, Red Lake Peatland; SCSP, Saint Croix State Park; TRAPP, Two Rivers Aspen Prairie.