strophiole

from The Century Dictionary.

• noun In botany, an appendage produced from the hilum of certain seeds, of the same origin as a true aril, but less developed. Sometimes used interchangeably with caruncle, from which it clearly differs.

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

• noun (Bot.) A crestlike excrescence about the hilum of certain seeds; a caruncle.

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

• noun botany An excrescence or tubercle around the hilum of certain seeds