brigwellt troellennog

== Welsh == === Noun === brigwellt troellennog (plural, singular brigwelltyn troellennog m) whorl-grass (Catabrosa aquatica) === Mutation === === Further reading === Cymdeithas Edward Llwyd (2018), “Y Bywiadur”, in Llên natur‎[1], retrieved 18 February 2025.