sweet alyssum

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

• noun An annual or perennial herb (Lobularia maritima) in the mustard family, native to the Mediterranean region and widely cultivated for its small, fragrant, typically white or lavender flowers.

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

• noun perennial European plant having clusters of small fragrant usually white flowers; widely grown in gardens