Search results SearchResult 1 of 1Content pagesMultimediaEverythingAdvanced Chapter 12 Equisetum X ferrissii (E. laevigatum X hyemale) was construed as a "variety" of one of the parents, E. hyemale. The fertile hybrid, Dryopteris clintoniana (D 69 KB (10,503 words) - 23:43, 13 February 2019