Volva

·noun A saclike envelope of certain fungi, which bursts open as the plant develops.

volva
volva or vulva, ae, f. [volvo], a wrapper, covering, integument. I In gen.: fungorum, Plin. 22,...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
volva
volva or vulva ae, f 3 VOL-, a womb, matrix , Iu.—Of a sow (a delicacy), H. ...

An Elementary Latin Dictionary