Caruncle: a soft, naked, fleshy excrescence or protuberance.
The seeds cannot be carried so well unless this ridge, caruncle, be present.
Did you ever hear of the caruncle on the head of the turkey?
Caruncle, kar-unk′l, n. a small fleshy excrescence, as the wattles of the turkey-cock.
The role of the caruncle in opening the shell seems to vary among different species of turtles.