Ageratina tomentella (Schrader) R.M.King & H.Rob. [ Eupatorium loeseneri B.L.Rob.]
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Ageratina tomentella (Schrader) R.M.King & H.Rob. [ Eupatorium tomentellum Schrader] [Compositae]
C.S. Sargent, Trees & Shrubs, vol. 1 : t. 9 (1855) [C.E. Faxon]