cammock

from The Century Dictionary.

• noun A leguminous plant, the rest-harrow, Ononis arvensis.
• noun An umbelliferous plant, probably the shepherd's-needle, Scandix Pecten.
• noun A crooked stick or club; a crooked beam; specifically, a crooked club used in the game of hockey or shinny.
• noun The game played with such a club; hockey or shinny.

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

• noun (Bot.) A plant having long hard, crooked roots, the Ononis spinosa; -- called also rest-harrow. The Scandix Pecten-Veneris is also called cammock.

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

• noun Ononis spinosa, the restharrow, a plant with long hard, crooked roots.
• noun Scandix pecten-veneris, the wild chervil.