opium poppy

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

• noun An annual plant (Papaver somniferum) native to southwest Asia, having grayish-green leaves and variously colored flowers and cultivated for its edible seeds and as the principal source of opium.

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

• noun Papaver somniferum the species of plant from which opium and poppy seeds are extracted

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

• noun southwestern Asian herb with greyish leaves and white or reddish flowers; source of opium