1. Amanita flavosorora, Rattlesnake Hill Wildlife Management Area, Livingston or Allegany County, New York, U.S.A. (RET 838-5)
For the moment, data will be accumulating on the
technical tab of this page.
—R. E. Tulloss
"Yellow Sister Ringless Amanita"
flavus, yellow + sorora, sister; continuing
the anthropomorphic conceit that taxa with similarities to those in
series Ceciliae are "sisters" to those taxa.
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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
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.
The following material is based on original research
of R. E. Tulloss.
72 mm wide, 5C5 over disc with umbo slightly darker,
at first with irregular narrow zone of yellow just
prior to inner end of striations, with this region
becoming light tan-cream on maturing, between
striations light tannish-cream, at maturity concave
with low umbo, tacky when moist, dull when dry;
context white, unchanging when
cut or bruised, 6 mm thick over
stipe, thinning evenly of about half distance to
margin, thence a membrane;
margin non-appendiculate, striate (0.5-0.6R);
universal veil as warts and small patches,
irregularly distributed, with texture verruculose,
distinctly yellowish gray at
maturity, apparently graying with age; submembranous
to friable, detersile.
narrowly adnate with no or faint decurrent line on
stipe apical region,
close, white in side view, white to
off-white in mass, unchanging when cut or bruised,
with faint gray edge; lamellulae subtruncate to
rounded truncate, of diverse lengths, unevenly
distributed, rather common.
123 × 6.5 - 7 mm, with 45-60% inserted in
substrate, off white, slightly darkening from handling,
narrowing upward, with apex barely flaring at maturity;
context off-white, with some staining from soil
in lower half, solid above, becoming hollow
near base, with material in upper central cylinder
being longitudinally fibrous and very dense, with
central cylinder 3.5 mm wide; exannulate;
universal veil probably originally saccate, with
few small scattered patches remaining in age, small,
grayish without yellow tint, volva either disappearing
from extreme base of stipe or lost in collecting.
Odorless; no taste recorded.
lamella edge tissue
In dark loam of mixed woods, with some old growth.
YORK—Unkn. Co. - ca. border of Livingston and
Allegany Cos., Rattlesnake Hill Wildlife
Mgmt. Area [45.5166° /N 77.8483° W, 557 m], 27.vii.2018
N. Dingman s.n. [RET 7-27-18-A] (RET 838-5).