The cap of Amanita sp-N37 is 26.5 mm wide, dull brown, unchanging when cut or bruised, and convex. Its flesh is white. The decurved margin is striate for about 40% of the cap radius. The volva is present on the cap as small, membranous patches that are whitish at first and become fulvous; they appear fibrillose-felted under a 10× lens.
The gills are free and close; they are somewhat orangish cream in mass and cream in side view. The short gills are truncate, plentiful, of diverse lengths, and unevenly distributed.
The stem of this mushroom is 31 × 3.5 mm, white (becoming faintly brownish from handling), and smooth to minutely fibrillose above (10× lens), with coarser fibrils (10× lens) below. The stuffed stem's flesh is slightly sordid white in its upper part and pale grayish below, unchanging when cut or bruised. The saccate volva is white with fulvous stains, membranous, and about 10 × 5.5 mm.
The mushroom is odorless.
The spores measure 9.8 - 11.2 × (8.8-) 9.2 - 10.8 µm and are globose to subglobose and inamyloid. Clamps are probably absent at bases of basidia.
The collection from which this mushroom is known to RET was made in New Haven Co., Connecticut, in loamy alluvial soil. The collector, Dr. Timothy Baroni, informs us that he finds the species commonly in the northeastern U.S.—R. E. Tulloss
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The following text is based on original research of R. E. Tulloss.
26.5 mm wide, brown, unchanging when cut or bruised, convex, dry, dull; context white, unchanging when cut or bruised, with a watery line under the pileipellis, 2 mm thick at stipe, thinning evenly for one half to two-thirds of radius, then a membrane to margin; margin decurved, striate (0.4R), nonappendiculate; universal veil as small patches, whitish, becoming fulvous, fibrillose-felted (lens), membranous, detersile.
free, without decurrent line on stipe apex, close, somewhat orangish cream in mass, cream in side view, 3.5 mm broad; lamellulae truncate, plentiful, of diverse lengths, unevenly distributed.
31 × 3.5 mm, white, becoming faintly brownish from handling, cylindric, flaring at apex, smooth to minutely fibrillose above (lens), with coarser fibrils (lens) below; context slightly sordid white above, pale grayish below, unchanging when cut or bruised, stuffed, with 1 mm wide central cylinder firmly packed with white fibrils; exannulate; universal veil saccate, white with fulvous stains, smooth, membranous, less than 1 mm thick at midpoint of limb, 10 × 5.5 mm, collapsing on stipe.
[20/1/1] 9.8 - 11.2 × (8.8-) 9.2 - 10.8 µm, (L = 10.6 µm; W = 10.0 µm; Q = 1.02 - 1.11; Q = 1.06), hyaline, colorless, smooth, thin-walled, ??, globose to subglobose, usually at least somewhat adaxially flattened; apiculus sublateral, truncate-conic to cylindric; granular to contents monoguttulate with or without small granules; color in deposit unknown.
Solitary. At 180± m elev. In loamy, alluvial soil.
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.