Polypodium glycyrrhiza very often associated with Acer macrophyllum. The fern is mycorrhizal, meaning it can form root associations with the hyphae of fungi. The sweet flavor of the rhizome was once attributed to the glycoside glycyrrhizin. However, a study has shown that the flavor may actually be due to polypodoside, which is 600 times sweeter than 6% sucrose solution. Licorice fern is cultivated as an ornamental garden plant. The cultivar 'Longicaudatum' has gained the Royal Horticultural Society's Award of Garden Merit. The licorice fern is sometimes valued for its licorice-flavored rhizome. Occasionally it is chewed, and it can also be brewed into
Ulmus 'Fastigiata Glabra' the Wentworth Elm); the current list of Living Accessions held in the Garden "per se" does not list the plant. A largish-leaved glabrous elm on The Mound, Edinburgh (2016) matches the 1958 RBGE herbarium leaf-specimen of "U. montana fastigiata glabra" (see External links below) and may be an example of the cultivar. None known. Ulmus 'Fastigiata Glabra' The elm cultivar Ulmus 'Fastigiata Glabra' was distributed by the Späth nursery, Berlin, in the 1890s and early 1900s as "U. montana fastigiata glabra". Späth used "U. montana" both for wych elm and for "U." × "hollandica" hybrids like 'Dampieri', so the name