hemiparasite

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

• noun A plant, such as mistletoe, that obtains some nourishment from its host but also photosynthesizes.

from The Century Dictionary.

• noun A partially parasitic plant.

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

• noun botany Any parasitic plant that also obtains energy by photosynthesis

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

• noun a parasitic plant that contains some chlorophyll and therefore is capable of photosynthesis