 The dimeric phenanthrenoid 8,8'-bidehydrojuncusol and the monomeric dehydrojuncusol can be isolated from "Juncus acutus".Perakensol is a phenanthrenoid that can be isolated from "Alseodaphne perakensis".Phenanthrenes have been reported in species of "Dendrobium", "Bulbophyllum", "Eria", "Maxillaria", "Bletilla", "Coelogyne", "Cymbidium", "Ephemerantha" and "Epidendrum".