bear's-breech

from The Century Dictionary.

• noun The English name of Acanthus spinosus. See Acanthus.
• noun The cow-parsnip, Heracleum Sphondylium: so called on account of its roughness.

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

• noun (Bot.) The English cow parsnip (Heracleum sphondylium)
• noun a widely cultivated southern European acanthus (Acanthus mollis) with whitish purple-veined flowers. See Acanthus, n., 1.

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

• noun rare Alternative form of bear's breech.

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

• noun widely cultivated southern European acanthus with whitish purple-veined flowers