Filthy Gingran

I have found the following clue to the solution of my Query on this point:— "Gingroen (gin-croen) *s. f.*, the toad-flax, a kind of stinking mushroom."—Owen's *Welsh Dictionary*. There is, however, some mistake (a high authority informs me) in the explanation given in the dictionary. Toad-flax is certainly not a "mushroom," neither does it "stink." Is the Welsh word applied to both equivocally as distinct objects? In Withering's *Arrangement of British Plants*, 7th edit., vol. iii., p. 734., 1830, the Welsh name of *Antirrhinum Sinaria*, or common yellow toad-flax, is stated to be *Gingroen fe…