fluellin means any of various varieties of Veronica, especially Veronica officinalis; speedwell. Lexicurio rates it Sui generis — a strength score of 88 out of 100.
Etymology
From Welsh llysiau Llewellyn, literally Llewellyn's herbs.
noun
- Any of various varieties of Veronica, especially Veronica officinalis; speedwell.“There is another sort of Lluellin which has longer branches wholly trailing upon the ground two or three foot long and sometimes more, thinner set with leaves thereon, upon small footstalks.”