description is based on Reid (1980).
The cap of Amanita flavella is yellowish-orange, convex, with a
nonstriate margin. The margin is slightly flaring.
The gills are crowded, white, and narrowly attached.
The stem is 75 mm high, slightly bulbous,
attenuate, pale yellow above the ring, and white below. The ring is
yellowish, membranous, ample, very narrow, and skirt-like. On the
bulbous base of the stem, yellowish powdery warts of volva form one or
This species is reported to have a slight, musty smell.
The spores measure 8.5 - 10 × 6 - 6.5 µm
according to the original description [E.-J. Gilbert & Cleland (1941)]
and are ellipsoid and amyloid. Reid (1980) found the measurements
to be 8.0 - 8.5 × 5.0 - 6.5 µm.
The species was originally described from New South
Wales, Australia. No ecological information was
≡Amplariella flavella E.-J. Gilbert & Cleland nom. nud.1940. Iconogr. Mycol. (Milan) 27, suppl.: 79, 174, tab. 47 (fig. 6). [Lacking Latin diagnosis, specification of holotype, etc. ICBN §36.1, §37.1, etc.] [Gilbert gives the authority for Amplariella flavella as "(E.-J. Gilbert & Cleland) nob." However, the name was not published until the following year (1941). Hence, it was impossible to recombine the name even if it had been validly published in 1940. I have corrected the author citation here.]
The editors of this site owe a great debt to Dr. Cornelis Bas
whose famous cigar box files of Amanita nomenclatural information
gathered over three or more decades were made available to RET for computerization
and make up the lion's share of the nomenclatural information presented on this site.
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
These pages will eventually be made live, so try again later.
AD [Grgurinovic (1997) does not include A. flavella in her study of South Australian fungi deposited in AD. However, Reid (1980) reportedly studied the holotype in ADW. Since the contents of ADW were moved to AD, presumably the specimen is there.]
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.
The following material is derived from the protolog and from Reid (1980).
from Cleland's annotation of holotype (Reid 1980): brilliant yellowish orange, convex-subgibbous, smooth, with edge slightly "spread out," "slightly sticky when moistened."
from Cleland's annotation of holotype (Reid 1980): adnexed, crowded, white.
from Cleland's annotation of holotype (Reid 1980): 76 mm long, pale yellow above partial veil, whitish below, slightly striate, "touched here and there with yellow," slightly attenuated upward; bulb slightly swollen; context not described; partial veil superior, ample, dependent, yellowish; universal veil as yellowish remnants in imperfect ring.
from Cleland's annotation of holotype (Reid 1980): Odor slight, musty.
Each spore data set is intended to comprise a set of measurements from a single specimen made by a single observer;
and explanations prepared for this site talk about specimen-observer pairs associated with each data set.
Combining more data into a single data set is non-optimal because it obscures observer differences
(which may be valuable for instructional purposes, for example) and may obscure instances in which
a single collection inadvertently contains a mixture of taxa.