ice plant

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

• noun Any of several succulent plants chiefly of the family Aizoaceae, especially the annual Mesembryanthemum crystallinum, native to southern Africa and having white or pink flowers, fleshy leaves, and stems covered with glistening papillae.

from The Century Dictionary.

• noun A plant of the genus Mesembryanthemum, the M. crystallinum, belonging to the natural order Ficoideæ.

from the GNU version of the Collaborative International Dictionary of English.

• (Bot.) A plant (Mesembryanthemum crystallinum), sprinkled with pellucid, watery vesicles, which glisten like ice. It is native along the Mediterranean, in the Canaries, and in South Africa. Its juice is said to be demulcent and diuretic; its ashes are used in Spain in making glass.

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

• noun a succulent annual, Carpobrotus edulis, of the stone plant family, having pale pink flowers and fleshy leaves covered with glistening hairs

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

• noun Old World annual widely naturalized in warm regions having white flowers and fleshy foliage covered with hairs that resemble ice