from
The Collaborative International Dictionary of English v.0.48
oxtongue \ox"tongue`\, ox-tongue \ox"-tongue`\, n. (Bot.)
A widespread European weed ({Picris echioides} formerly
{Helminthia echioides}) with spiny tongue-shaped leaves and
yellow flowers. The name is applied to several plants, from
the shape and roughness of their leaves; as, {Anchusa
officinalis}, a kind of bugloss, and {Helminthia echioides},
both European herbs. It has been naturalized in the U. S.
Syn: bristly oxtongue, prickly oxtongue, bitterweed, bugloss.
[1913 Webster + WordNet 1.5]