garden cress

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

• noun An annual herb (Lepidium sativum) of the mustard family, cultivated for its pungent leaves often used in salads or soups.

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

• noun a plant, Lepidium sativum, whose pungent leaves are used in salads

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

• noun cress cultivated for salads and garnishes