Amanita sp-McAdoo-358-1

name

Amanita sp-McAdoo-358-1

author

Tulloss nom. prov.

name status

cryptonomen temporarium

GenBank nos.

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accession	locus	voucher	source

intro

Macroscopic description based on field notes of Buck McAdoo. The remainder of the following is based on original research of R. E. Tulloss.

pileus

50 - 95 mm wide, at first with sordid yellowish (sometimes slightly olivaceous) brown over disc and rather broad white zone at margin, in age largely sordid yellowish brown fading to tan-buff at margin, campanulate at first, then convex, concave in age, often with obtuse low umbo; context white, 10^± mm thick above stipe; margin nonappendiculate, short striate (0.15-0.2R); universal veil absent or as small white fragment.

lamellae

free, crowded, white, with edge entire; lamellulae truncate to excavate, sometimes with tooth extending along undersurface of pileus context.

stipe

130 - 180 × 14 - 21⁺ mm, white, narrowing upward, with appressed white pruinosity on uppermost portion, with fine flattened squamules below (becoming pallid brownish tan with age and handling); context white, hollow, with central cylinder up to 15 mm wide: exannulate: universal veil saccatae, submembranous, fragmenting, fragile, pale gray in upper part of limb, whitish below, with cottony exterior, with inner surface smooth, moist, pale gray.

odor/taste

Odor and taste mild.

macrochemical
tests

none reported

basidiospores

send to graphing tool

[20/1/1] (8.1-) 9.0 - 12.5 (-17.4) × 7.5 - 11.3 (-17.0) μm, (L = 11.0 μm; L' = ?? μm; W = 10.0 μm; W' = ?? μm; Q = 1.04 - 1.22 (-1.23); Q = 1.10; Q' = ??), hyaline, colorless, smooth, thin-walled, inamyloid, predominantly subglobose, occasionally globose or broadly ellipsoid; apiculus sublateral, cylindric; contents predominantly monoguttulate ("oil drop" type); off-white (whitish buff) in deposit.

ecology

Subgregarious. Ca. sea level. In soil and conifer duff of old growth forest including Pseudotsuga menziesii, Thuja plicata, and Tsuga sp.

material examined

U.S.A.: WASHINGTON—Whatcom Co. - ca. Bellingham, Stimpson Nature Reserve, 21.x.2004 Buck McAdoo page358#1 (RET 456-8).

discussion

At present, this entity is known only from a single location.

citations

—R. E. Tulloss

editors

RET