Xanthoxylum
Xanthoxylum , noun
[New Latin, from Greek xanqo`s yellow + xy`lon wood.]
(Botany) A genus of prickly shrubs or small trees, the bark and rots of which are of a deep yellow color; prickly ash.
The commonest species in the Northern United States is Xanthoxylum Americanum. See Prickly ash, under Prickly.