Mahonia n. : The Oregon grape, a species of barberry (Berberis Aquifolium), often cultivated for its hollylike foliage.

Example:
(UK) What can I plant under/around my Mahonia Tree?

Taxonomy
Mahonia, species, genus, free encyclopedia, genus Berberis, genus name, several species, family Berberidaceae, Mahonia japonica, plants, Mahonia aquifolium, fruit, eastern Asia, type species, species name, search, Oregon, Governor's mansion.

Defination from the web:
Mahonia is a genus of about 70 species of evergreen shrubs in the family Berberidaceae, native to eastern Asia, the Himalayas, North America and Central America. ... Botanists disagree on the acceptability of the genus name Mahonia. ...