Japanese maple

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A shrub or small tree of any of various cultivars of the East Asian maple Acer palmatum, valued as ornamentals for their decorative, often reddish foliage.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A species of maple, Acer palmatum, with great natural variety of appearance, often with reddish leaves for most of the year and multiple trunks, widely grown as an ornamental.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun ornamental shrub or small tree of Japan and Korea with deeply incised leaves; cultivated in many varieties
• noun leaves deeply incised and bright red in autumn; Japan