Amanita sp-V01

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name	Amanita sp-V01
name status	cryptonomen temporarium
author	Tulloss
images	1. Amanita sp-V01, Weems, Lancaster Co., Virginia, U.S.A. (RET 210-8)
cap	The cap of this taxon is 64 - 94 mm wide, very pale grayish brown to brownish gray to tan over the margin with a brownish gray disc, at first hemispheric, then plano-convex, umbonate, tacky, and shiny. The cap's flesh is mainly whitish, although grayish under the cap's skin, unchanging when cut or bruised, and 4.5 - 7.5 mm thick above the stem. The cap's margin is striate (for about 25% of the cap's radius), and not appendiculate. Volval remnants are absent from the cap in the material that has been reviewed.
gills	The gills are narrowly adnate with a decurrent tooth on the very top of the stem and a short decurrent line on the upper stem (use 10× lens). In addition the gills are crowded, cream to sordid cream in mass, off-white in side view, and 6 - 8.5 mm broad. Infrequently forking gills are present. Short gills are truncate.
stem	The ringless stem is ?? - 138 × 8 - 11 mm, white to pale gray, browns from handling (especially on the surface fibrils), narrows upward or is cylindric, occasionally slightly flares at the very top of the stem, is minutely fibrillose and longitudinally striatulate; and occasionally, the surface splits into recurved scales. The stem's flesh is off-white, not changing color when cut or bruised, and partially stuffed to hollow. The volva is saccate, membranous (but breaking somewhat easily) white, smooth, leathery, with the highest point on the voval limb 29 - 33 mm from the base of fruiting body. The volva is only attached to the stem at the stem's base and so is easily detached from the stem during collecting. There is no obvious internal limb in the volvas that have been examined to date.
odor/taste	The odor can be faintly fish-like. The taste has not been recorded.
spores	The spores measure (8.4-) 9.8 - 12.2 (-17.5) × (7.0-) 8.4 - 11.9 (-12.9) µm and are globose to subglobose to broadly ellipsoid (rarely elongate) and inamyloid. Clamps are not to be found at the bases of basidia.
discussion	This mushroom is known only from the eastern U.S., where it occurs subgregariously in deep sandy soils (for example, of the Atlantic Coastal Plain). The taxon is not well-known, but may have a range extending from Connecticut to the U.S. coast of the Gulf of Mexico and the sandy oak-pine (Quercus-Pinus) forests of east Texas.—R. E. Tulloss
brief editors	RET

name

Amanita sp-V01

author

Tulloss

name status

cryptonomen temporarium

GenBank nos.

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accession	locus	voucher	source

intro

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 upon original research by R. E. Tulloss.

pileus

64 - 94 mm wide, very pale grayish brown to brownish gray (5C3) to tan (5B2) over margin with a brownish gray (5D3) disc, at first hemispheric, then plano-convex, umbonate, tacky, shiny; context whitish, sordid under pileipellis, unchanging when cut or bruised, 4.5 - 7.5 mm thick at stipe, thinning evenly until about 10 mm from margin, then membranous; margin striate (0.25R), nonappendiculate; universal veil absent.

lamellae

narrowly adnate with decurrent tooth, with short decurrent line on stipe (lens), crowded, cream to sordid cream in mass, off-white in side view, 6 - 8.5 mm broad, margins bearing minute white flocculence, occasional forking present (more often absent); lamellulae truncate.

stipe

?? - 138 × 8 - 11 mm, white to pale gray, browning from handling (especially on surface fibrils), narrowing upward or cylindrical, occasionally slightly flaring at apex, minutely fibrillose, occasionally the surface splitting into recurved scales, longitudinally striate; context off-white, not changing color when cut or bruised, partially stuffed to hollow, with 2.5 - 2.5 mm wide central cylinder, larva tunnels concolorous; exannulate; universal veil as saccate volva, membranous, but breaking somewhat easily, white, smooth, leathery, highest point on limb 29 - 33 mm from base of stipe, only attached to stipe at base and so easily detached from stipe, without evident limbus internus.

odor/taste

Odor faintly fishy. Taste not recorded.

macrochemical
tests

Spot test for tyrosinase (L-tyrosine): positive on surface, and in context of, stipe; other tissues not tested.

basidiospores

send to graphing tool

[61/3/1] (8.4-) 9.8 - 12.2 (-17.5) × (7.0-) 8.4 - 11.9 (-12.9) µm, (L = 10.8 - 11.5 µm; L’ = 11.1 µm; W = 9.6 - 10.1 µm; W’ = 9.8 µm; Q = 1.0 - 1.25 (-1.79); Q = 1.13 - 1.14; Q’ = 1.13), colorless, hyaline, thin-walled, smooth, inamyloid, globose to subglobose to broadly ellipsoid, occasionally ellipsoid or elongate, sometimes adaxially flattened, occasionally expanded at one end; contents ?; apiculus sublateral, ?; ? in deposit.

ecology

Subgregarious. In sandy soil of Atlantic coastal plain in regions with plentiful Quercus species and one or more common species of Pinus as well as other potential symbionts. Ecological details are only poorly recorded for this species to date.

material examined

U.S.A.: VIRGINIA—Lancaster Co. - Weems, grounds of Christ Church Foundation, 1.ix.1985 M. A. King & D. C., E. H., J. C., M. H. & R. E. Tulloss 9-1-85-J (RET 210-8).

discussion

Amanita sp-V01 was originally collected in the Atlantic coastal plain of Virginia. As noted in the list of material examined, above, the species has probably also been collected in the Atlantic coastal plain of Connecticut.

The reader should compare the present species with A. sp-N53, which has some similarities.

Material that appears very similar has been collected in eastern Texas [D. P. Lewis 9043 (RET 430-6)]. Spores of the Texas material provide the following data: [100/5/2] (8.4-) 9.5 - 12.6 (-17.5) × (7.0-) 8.4 - 11.2 (-12.9) µm, (L = 10.5 - 11.5 µm; L' = 11.0 µm; W = 9.5 - 10.1 µm; W' = 9.8 µm; Q = (1.0-) 1.04 - 1.26 (-1.79); Q = 1.10 - 1.14; Q' = 1.13). ..more..

citations

—R. E. Tulloss

editors

RET

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