penboeth gulddail

== Welsh == === Etymology === Literally, “narrow-leaved hemp-nettle”. === Noun === y benboeth gulddail f downy hemp-nettle, narrow-leaved hemp-nettle (Galeopsis segetum) === Mutation === === Further reading === Cymdeithas Edward Llwyd (2003), Planhigion Blodeuol, Conwydd a Rhedyn [Flowering Plants, Conifers and Ferns] (Cyfres Enwau Creaduriaid a Planhigion; 2)‎[1] (in Welsh), Llanrwst: Gwasg Carreg Gwalch, →ISBN, page 53‎[2] R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “penboeth gulddail”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies