  |
| Some European authors have
pointed out to this variation of A. xanthodermus defined by
the distinctive Lepiota-like cracks and fissures that remind one of scales. . It is not
universally accepted though. Some authors believe that the fissures and
cracking of the cap are environmentally dependent. I have observed patches
growing in the same lawn where some groups develop these features and some
do not. The differences seem to persist despite the shared environment.
|

The
picture shows a mixed collection of Agaricus xanthodermus v.
xanthodermus and v. lepiotoides -- growing side
by side in the same lawn demonstrates that the cracked cap is not
environmentally induced, but the variations are rather distinct.
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Macrolepiota rachodes (l) and
Agaricus xanthodermus v. lepiotoides (r) |