sea kale

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

• noun A European seashore plant (Crambe maritima) of the mustard family, having edible shoots and leaves.

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

• (Bot.) See under kale.

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

• noun Crambe maritima, a halophytic perennial plant that grows wild along the coasts of Europe.

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

• noun perennial of coastal sands and shingles of northern Europe and Baltic and Black Seas having racemes of small white flowers and large fleshy blue-green leaves often used as potherbs