The spores of the present species measure (9.8-) 10.0 - 11.8 (-12.5) × (5.8-) 6.0 - 7.5 µm and are ellipsoid to elongate and inamyloid. Clamps are probably absent at bases of basidia.
—R. E. Tulloss
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
The following text is derived from molecular studies
of L. V. Kudzma and from other original research of
R. E. Tulloss.
63 mm wide, brownish orange, losing some of the
orange tint with time, becoming yellowish gray, browner and darker over umbo,
virgate, planar, with rather broad central umbo,
tacky; context off-white, brownish or grayish
tint in very shallow region below pileipellis,
unchanging, 4.5 mm thick over stipe, thinning evenly
for about two-thirds radius, them as membrane to
margin; margin nonappendiculate, striate
(0.2–0.25R), decurved; universal veil as
pallid small patches and flat warts with apparently
fibrillose upper surfaces, pallid at first, becoming
distinctly yellowish, subfelted.
free, with weak imcomplete irregularly distributed broken decurrent lines (10× lens) on stipe apex, crowded, cream in mass, whiter than pileus context in side view, with some small areas of browning near lamella edges, 6.5 mm wide, apparently not marginate; lamellulae truncate (especially the longer lamellulae) or subattenuate, unevenly distributed, of diverse lengths, rather common.
156 × 7 mm, off-white, becoming palely sordid
yellowish from handling, cylindric to subsinuous,
flaring at apex, originally with punctate surface
in upper 20–30 mm, becoming fibrillose below this
zone, with fibrils brown to gray or black
continuing to with 30 mm of stipe base, then
surface becoming substrangulate down to greatest
mass of volval remnants, bottom of stipe
??, with insect tunnels
concolorous, stuffed with longitudinally oriented
subtranslucent white fibers, with central cylinder
2.5 mm wide; exannulate; universal
veil as warts or small patches, white on
exterior surface with pale grayish interior
surface, smooth, submembranous, with fragments
distributed unevenly [with isolated individual
warts as well as two irregular rings of warts
(one at top of substrangulate zone and one at its
lower end], distributed up to 42 mm above stipe
[30/1/1] (9.8-) 10.0 - 11.8 (-12.5) × (5.8-) 6.0 - 7.5 µm, (L = 10.7 µm; W = 6.8 µm; Q = (1.43-) 1.44 - 1.74 (-1.85); Q = 1.58), hyaline, colorless, thin-walled, smooth, often adaxially flattened, ellipsoid to elongate, occasionally expanded at one end; apiculus sublateral, cyindric; contents ??; ?? in deposit.
Solitary. After a period of heat between 30° and 40° C followed by several days of drenching rains. In dark loam.
CONNECTICUT—New London Co. - Colchester,
Day Pond St. Pk. [41.5639° N/ 72.4183° W, 134 m],
25.viii.2007 “Karen” s.n. [RET 8-25-07-B]
(RET 438-4, nrITS & nrLSU seq'd.).
A. sp-N58 is
somewhat similar in gross appearance.
The nrITs and nrLSU sequences derived from the
original collection of this code-numbered taxon
provide a clear indication that A. sp-N49
can be assigned to sect. Vaginatae and
to the provisional series
Penetratrices (see the techtab on the
page). Also, the sequences
indicated the present entity is distinct from all
others that we have sequenced in the Vaginatae
with the exception of A. sp-N58.
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.