richardsonii (Sprengel) Á. Löve & D. Löve Aster sibiricus var. giganteus (Hooker) A. Gray Eurybia sibirica var. gigantea (Hooker) G. L. Nesom Treatment appears in FNA
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and S. puniceum (A. G. Jones 1989). Some of those hybrids need confirmation. Symphyotrichum ×salignum (Willdenow) G. L. Nesom is of garden origin and is
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text: Nesom, G. L. 1989d. The separation of Trimorpha (Compositae: Astereae) from Erigeron. Phytologia 67: 61–66. Author: Nesom, G.L. Year: 1989d Title:
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