The Collaborative International Dictionary
Prickly ash \Prickly ash\ (Bot.),
A prickly shrub ( Xanthoxylum Americanum) with yellowish flowers appearing with the leaves; also called toothache tree. All parts of the plant are pungent and aromatic. The southern species is Xanthoxylum Carolinianum.
--Gray.(Bot.), Hercules'-club, also called the Angelica tree.
Xanthoxylum \Xan*thox"y*lum\, n. [NL., from Gr. xanqo`s yellow + xy`lon wood.] (Bot.) A genus of prickly shrubs or small trees, the bark and rots of which are of a deep yellow color; prickly ash.
Note: The commonest species in the Northern United States is Xanthoxylum Americanum. See Prickly ash, under Prickly.
Usage examples of "xanthoxylum americanum".
The Angelica Tree of America (Xanthoxylum Americanum, Mill), the Prickly Ash, as it is more generally named, is not allied to the umbelliferous Angelicas.