alyswm gwyn

== Welsh == === Etymology === Literally, “white alyssum”. === Noun === alyswm gwyn m hoary alyssum, hoary alison (Berteroa incana) ==== Synonyms ==== alyswm lledlwyd === Further reading === Griffiths, Bruce; Glyn Jones, Dafydd (1995), “alison”, in Geiriadur yr Academi: The Welsh Academy English–Welsh Dictionary‎[1], Cardiff: University of Wales Press, →ISBN