dead-men's-fingers

from The Century Dictionary.

• noun The hand-orchis, Orchis maculata: so called from its pale hand-like tubers. The name is also given to other species of Orchis and to some other plants.
• noun An alcyonarian or halcyonoid polyp of the order Alcyonaceæ, family Alcyoniidæ, and genus Alcyonium, as A. digitatum. Also called cow-paps and mermaid's-glove. See Alcyonium.

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

• noun the fruiting bodies of the fungi of the genus Xylaria