volva

/vol-vuh/US // ˈvɒl və //UK // (ˈvɒlvə) //

挥霍无度,挥发,挥杆,挥霍

Definitions

n.名词 noun

1
Mycology.
- : the membranous envelope that encloses the base of various mushrooms formed when the velum ruptures.

There is no volva, but there is a ring which is sometimes persistent, friable, and fugacious.
There are also variations in the way in which the volva is ruptured, as well as in the character of the stem.
The veil is universal, forming a perfect volva, distinct from the cuticle of the pileus.
The volva is quite thick and frequently the plant, when in the egg state, has the appearance of a phalloid.
The stem is white, smooth, volva split to the base into four nearly equal segments.