pileate

from The Century Dictionary.

• Capped; specifically, in botany, having a pileus or cap, as certain fungi. See Aguricus.
• Having the form of a cap or cover for the head. See cut under Crypturus.

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

• adjective Having the form of a cap for the head.
• adjective (Zoöl.) Having a crest covering the pileus, or whole top of the head.
• adjective (Zoöl.) a large American woodpecker (Ceophloeus pileatus). It is black, with a bright red pointed crest. Called also logcock, and woodcock.

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

• adjective pileated