This mushroom suggests small specimens of Amanita rubescens or one of the North American taxa that has gone under that name. The following material is based on original research of R. E. Tulloss and C. Rodríguez Caycedo.
The 50-55 mm wide, hemispheric, tan cap is red-brown over its center, and is a more yellowish tan near it’s margin. The cap’s off-white flesh is 2-3.5 mm thick, a red line is present at the flesh's attachment to the gills. The cap’s flesh bruises brownish-red and thins evenly to the cap margin. There are no lines or ribs on the cap’s edge which may curved inward. The volval remnants are present as yellow to white slightly membranous felted patches or large warts that are easily removed from the cap.
The crowded off-white gills are narrowly attached and are 3.5 – 4.5 mm broad. There is a down curving line on the sheath that remains when the ring is removed from the stem. The gills may develop wine-red spots. The short gills end abruptly, are plentiful, and are of varying lengths.
The off-white stem is 32 - 51 × 4.5 - 6 mm and stains pink to pale brick-colored. The faintly longitudinally lined stem is cylindric and narrows upward, flaring slightly at the top. The stem is decorated with fine fibers and scales. The bulb is 12 -13 × 7-8 mm tapers toward its base and is slightly doglegged in some specimens. The thin ring is near the top of the stem and tears easily. The ring is white and faintly lined on top and smooth on its bottom. The skirt can sometimes be left in large pieces on the cap’s edge. No volval remnants where seen on the stem base in the material examined.
Collections of this species have not been tasted. The odor has been reported to be like fruit or "flowery soap."
The spores of this species measure (6.5-) 6.9 - 9.5 (-10.5) × 4.5 - 6.1 (-7.0) μm, are broadly ellipsoid to ellipsoid to elongate, and amyloid. Clamps are probably not present at bases of basidia.
At present we know this species from only one site in eastern North America—in eastern Connecticut. A small group was found in sandy soil in a mixed forest of pine (Pinus), oak (Quercus), and Eastern Hemlock (Tsuga canadensis).
Preliminary genetic and morphological analysis indicates this species is distinct from other rubescent taxa in section Validae known from both Europe and North America.
In the same region, the non-white, more or less rubescent taxa include A. amerirubescens (presently being subdivided based on current research reported on this site), A. flavorubens, and A. sp-36.—R. E. Tulloss, C. Rodríguez Caycedo, and N. Goldman
Tulloss, Rodríguez Caycedo & K. W. Hughes
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 original research of R. E. Tulloss and C. Rodríguez Caycedo.
50 - 55 mm wide, red-brown (possibly from bruising/staining) over disc, tan in outer third or quarter of radius, citrin-yellow at margin, hemispheric, dry, shiny; context 2 - 3.5 mm thick, off white, with red line at attachment to lamellae, with no coloration below pileipellis, bruising brownish red, thinning evenly to margin; margin nonstriate, nonappendiculate, incurved; universal veil as submembranous-felted patches or large warts, pale yellow, becoming whitish with exposure, detersile.
narrowly adnate with decurrent line on sheath remaining when partial veil is removed, crowded, sordid white in mass, pale yellowish white in side view, developing scattered wine-red spots, 3.5 - 4.5 mm broad, broadest at mid-length; lamellulae truncate to attenuate, unevenly distributed, plentiful, of diverse lengths.
32 - 51 × 4.5 - 6 mm, off-white, staining pinkish to pale brick, becoming sordid from handling, cylindric or narrowing upward, slightly flaring at apex, longitudinally striatulate, fibrillose-squamulose; bulb 12 - 13 × 7 - 8 mm, fusiform, slightly doglegged on some specimens; context not recorded; partial veil superior, membranous, skirt-like, thin, tearing, white above and below, faintly striate above, smooth below, sometimes left in large fragments on pileus margin; universal veil not evident in material examined.
Odor floral or fruitlike or like flowery soap. Taste not recorded.
This taxon is represented in the RET herbarium by a single collection that showed some partial in situ drying. Preliminary morphological and genetic analyses indicate this entity is distinct from other known rubescent taxa of section Validae of Europe and the Americas.
The following figure provides comparison of the sporographs of the present species and a cluster of somewhat similarly colored rubescent taxa from the same region—A. amerirubescens:
—R. E. Tulloss and C. Rodríguez Caycedo
Information to support the viewer in reading the content of "technical" tabs
can be found here.
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.