The present species could be confused with
A. cyclops in
the field except for
the proportion of the pileus radius occupied by the
marginal striations—0.25-0.4R in the present
species and 0.55-0.6R in A. cyclops
The fuligineus disc of A. cyclops has its
pigment constrained within a well defined circle, while
the umbraceous pigment of the center of the cap
in the present species is not so confined, but has
more or less narrow regions (suggesting a sun's
rays) concolorous with the disc that project to or
into the pileus' striate region.
—R. E. Tulloss
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