The cap grows and expands and bursts this veil into
fragments. That part of the veil which breaks away from the cap, called
the secondary veil, forms the annulus or ring. It resembles a collar,
and is generally fastened to the stem. It is not always permanent or
fixed in one place. It may disappear when the plant is mature. It is
often fragile, loose and torn, and sometimes is movable on the stem.
The name volva is particularly given to that part of the universal veil
which remains around the base of the stem, either sheathing it or
appressed closely to it, or in torn fragments. The volva and ring, or
annulus, are not always present in mushrooms. The rupture of the veil
often causes a part of it to remain on the cap in the shape of warts or
scales. These may disappear as the plant grows older, and are sometimes
washed off by a heavy rain.
THE TUBES OR PORES.
There is a group of fungi called Polyporei, which have tubes or pores
instead of gills. They are placed under the pileus just as the gills are
situated, and contain the spores.
Pages:
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41