tafod y ddaear hirfain

== Welsh == === Noun === tafod y ddaear hirfain m (plural tafodau'r ddaear hirfain) elongate earthtongue (Geoglossum elongatum) === Mutation === === Further reading === Cymdeithas Edward Llwyd (2018), “Y Bywiadur”, in Llên natur‎[1], retrieved 16 August 2025.