+
The common mushroom Agaricus campestris belongs to this group. The gills
are rounded behind and free, the stem has a collar. There are many
edible mushrooms in this genus. They grow in pastures, and the larger
ones are called Champignons. In former times when one spoke of eating
mushrooms the species A. campestris, or campester, was always the one
denoted.
+STROPHARIA = a sword belt.+
This genus has a ring. The gills are generally attached to the stem;
some species grow on the ground, and some grow on other fungi. They are
sometimes bell-shaped and then flattened, often with a mound or umbo.
+HYPHOLOMA = web and fringe.+
The veil in this genus is woven in a web which adheres to the margin of
the cap. The cap is more or less fleshy, and the margin at first
incurved. The gills are attached or have a tooth. There is no ring. The
plants grow in tufts on wood, or at the base of trees in the autumn.
+PSILOCYBE = naked and head.+
The cap in this genus is fleshy, smooth, and the margin at first
incurved.
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