The following description is based on original
research by the authors of this page.
"sp-33": The cap of this species is about 53 mm wide,
pale grayish brown with notably darker gray-brown to
brown in the center and slightly darker gray brown over
the striate area, and umbonate. The cap's flesh
is off-white except under cap's skin in the umbo where
it is gray and elsewhere under the cap's skin paler
gray; the flesh is 4 mm thick above the stem.
The cap's margin is striate (45% of pileus radius); and
volval remnants are absent from the cap.
"sp-T47": The cap of this specis is about 47 mm wide.
At first the center of the cap is buff, while the
remainder is pale grayish. As the mushroom ages
the cap becomes grayer except for the center which
becomes yellower. The cap is ovoid at
first and becomes broadly bell-shaped with a distinct
umbo. The cap's flesh is white. The margin of
the cap is radially grooved with grooves occupying
one-fifth to one-fourth of the cap's radius.
There is no volval material remaning on the cap.
"sp-T33": The gills are free, crowded, off-white in
mass, white to pale grayish white in side view, and
about 3.5 mm broad. The short gills are truncate,
unevenly distributed, of diverse lengths, and
"sp-T47": The gills are narrowly connected to the stem in
material viewed so far; they are close and cream
to white. The short gills are squarely
cut-off or nearly so and not very common.
"sp-T33":The stem is about 151 × 7 mm, off-white,
smooth in the upper three-quarters, and below area has
pale grayish fibrils forming upward pointing
squamules. There is no annulus on the
stem. At the stem's base, the volva is
sack-like, membranous, white on both inside and
outside surfaces, 42 × 12 mm. The volva has a
thin inner limb with very uneven free edge; it is
unusually long and attached to the outer volval limb
at the point of that limb's attachment to to the
"sp-T47": The ringless stem of A. trygonion is 106 - 120 ×
6 - 7.5 mm and white to off-white. The stem is
inserted in a white, persistent, membranous,
sack-like volva ranging up to 29 × 15.5 mm and
attached to the stem's base.
"sp-T47": The odor of this mushroom is slight or
indistinct. Its taste has not been recorded.
"sp-T33": Spore from this species measure (9.8-) 10.0 -
11.5 (-12.5) × (8.1-) 8.5 - 10.0 (-10.5) μm and are
inamyloid and subglobose to broadly ellipsoid.
Status of clamps on the basidia has not been
investigated, but they are probably absent.
"sp-T47": The spores of A. trygonion measure (7.9-)
9.5 - 12.5 (-13.0) × (7.1-) 8.2 - 10.3 (-11.5) μm and
are dominantly broadly ellipsoid (sometimes subglobse
or ellipsoid) and inamyloid. Clamps are absent
from bases of basidia.
"sp-T33": The long, thin inner limb of the volva is
somewhat reminiscent of the same structure in the
Atlantic coastal plain species
longicuneus Tulloss nom. prov., but
the spores of the latter species are
larger and closer to being spherical. The
two species are also genetically separated as
indicated in part by the more common nrLSU 5' motif
(beginning with "TTT") in longicuneus and the
less common (beginning with "TCT") in the present
"sp-T47": Amanita trygonion is known only from
mixed forest in sandy soils of eastern Texas.
This species suggests
sp-V01 to which the reader may wish to
This species was formerly called both Amanita
sp-T33" and "Amanita
sp-T46" on this site.—R. E. Tulloss and R. L.
Tulloss, Pastorino, Kudzma &S. D. Russell
"Little Dove Ringless Amanita"
, Gr., dovelet, also a "pet name" for a
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.
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 molecular work of
L. V. Kudzma and S. D. Russell and other original
research by R. L. Pastorino and R. E. Tulloss.
Up to 47± mm wide, sordid cream becoming
somewhat grayer with age, with buff disc becoming
somewhat yellower with age, campanulate at first,
then broadly campanulate, with distinct umbo,
glabrous; context white; margin
striate (0.2 - 0.25R); universal veil absent.
adnexed, close, cream-white; lamellulae
truncate or rounded truncate, infrequent to rare.
106 - 120 × 6 - 7.5 mm, white to off-white;
exannulate; universal veil as saccate
volva, roughly cylindric or slightly flaring, white,
membranous, persistent, up to 29 × 15.5 mm, adhering
to stipe base.
Odor slight or indistinct. Taste not recorded.
52 - 59 × 14.8 - 16.5 μm, dominantly 4-, sometimes 1- or 2- sterigmate; ??.
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.