cucullate

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

• adjective Having the shape of a cowl or hood; hooded.

from The Century Dictionary.

• Hooded; cowled; covered as with a hood.
• In botany, having the shape or semblance of a hood; wide at the top and drawn to a point below, in the shape of a cornet of paper; like or likened to a hood: as, a cucullate leaf or nectary. In mosses it is specifically applied to a conical calyptra cleft at one side.
• In zoology, hooded; having the head shaped, marked, or colored as if hooded or cowled: specifically applied, in entomology, to the prothorax of an insect when it is elevated or otherwise shaped into a kind of hood or cowl for the head.

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

• adjective Hooded; cowled; covered, as with a hood.
• adjective (Bot.) Having the edges toward the base rolled inward, as the leaf of the commonest American blue violet.
• adjective Having the prothorax elevated so as to form a sort of hood, receiving the head, as in certain insects.
• adjective Having a hoodlike crest on the head, as certain birds, mammals, and reptiles.

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

• adjective cucullated