winter purslane

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

• noun An annual plant (Claytonia perfoliata) of western North America, having small white flowers and fleshy leaves sometimes eaten in salads.

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

• noun succulent herb sometimes grown as a salad or pot herb; grows on dunes and waste ground of Pacific coast of North America