For the moment, see the techtab of this page for the
developing information on this species.
The cap is convex with a central umbo and
zonate with a dark (over center),
then light, then dark (over striations) pattern.
The color over the center is dark brown. The light
band is a sordid pale tan. The color over the
striation area is a lighter version of the color
over the center.
The cap's margin in long-striate. A white patch
of membranous volva may be left on the cap.
Translation to English is by RET who is
responsible for all errors.—Y. Lamoureux and R. E. Tulloss
double click in markup mode to edit.
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The following text may make multiple use of each data field.
The field may contain magenta text presenting data from a type study
and/or revision of other original material cited in the protolog of the present taxon.
Macroscopic descriptions in magenta are a combination of data from the protolog and
additional observations made on the exiccata during revision of the cited original
The same field may also contain black text, which is data from a revision of the present
taxon (including non-type material and/or material not cited in the protolog).
Paragraphs of black text will be labeled if further subdivision of
this text is appropriate.
Olive text indicates a specimen that has not been
thoroughly examined (for example, for microscopic details) and marks other places in the text
where data is missing or uncertain.
40 - 90 mm wide, dark brown
over disc, medium grayish brown in zone over marginal
striations, with intermediate zone sordid grayish
tan; at first ovoid, then rounded-conic, then
planoconvex and umbonate; margin long striate
context white, ??;
universal veil usually absent, infrequently
present as large calyptra, membranous, generally white
at first, grayish in part.
??, whitish to pale grayish,
grayish in exsiccata; lamellulae ??.
70 - 120 × 5 - 12 mm, white or pale grayish, finely
floculent at first, then smooth; context white,
universal veil as saccate volva, white, sometimes
grayish in part, membranous, persistent.
Odor indistinct. Taste not recorded.
lamella edge tissue
9.5 - 11.5 × 8.5 - 11.0 µm, globose to subglobose,
inamyloid; white in deposit. [Note: Iit is not possible to
render a sporograph from this data.—ed.]
Under Quercus, Fagus, and
Betula. Occasional, July to September.
QUÉBEC—?? Co. -
?? Y. Lamoureux 1645
(CMMF). ?? Co. -
??, Y. Lamoureux 1633
Some comments of YL: In Québec, with the present species,
there sometimes also
occurs another amanita that is smaller with a pale ash-
gray to silver-gray pileus that is uniformly colored.
Unfortunately, we haven't had the opportunity to collect
the latter. In North America, both of these taxa
have been mistakenly identified as A.
Translation to English and reformatting for this site is
by R. E. Tulloss who is responsible for all errors.
—R. E. Tulloss
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Each spore data set is intended to comprise a set of measurements from a single specimen made by a single observer;
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a single collection inadvertently contains a mixture of taxa.