Search results SearchResult 1 of 1Content pagesMultimediaEverythingAdvanced Achillea polyploid Achillea (Compositae) in western North America. Brittonia 27: 187–196. Achillea alpina, Achillea millefolium, Achillea nobilis, Achillea ptarmica 6 KB (563 words) - 19:56, 5 November 2020