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.
82 mm wide, pallid brown (not tan) with olive tint, sometimes darker brown between striations, unbruising, broadly campanulate at first, tacky, subshiny to slightly metallic; context white except for thin sordid zone under pileipellis in disc, unstaining, narrowing evenly for half radius, then membranous to margin; margin nonappendiculate, subtuberculatestriate (0.4R); universal veil as scattered subpulverulent to floccose patches, detersile, blackish gray with pallid edges, blackening on exposure.
free without decurrent line on stipe, close to subcrowded, off-white to grayish white in mass, off-white to grayish (near cap margin) in side view, graying with age, with minutely flocculose margin white or whitish, 10 mm broad; lamellulae truncate, plentiful, unevenly distributed, of widely varying lengths.
106 × 10 mm, white, browning faintly from handling, narrowing upward, not notably flaring at apex, with white flocculence in upper half, with appressed subsilky patches below, with small white pseudorhizae at base; context hollow, white, with sparse cottony material in central cylinder, with larval tunnels pale ochraceous to concolorous; exannulate; universal veil as loosely attached patches beginning about 10 mm above base, pale gray to gray, not plentiful, with cupulate cottony white appressed portion enclosing stipe base.
Odor lacking. Taste pleasant, slightly nut-like in raw material.
46± - 69± × 13.0± - 16.5± μm, 4-sterigmate, with sterigmata up to ?? × ??; arising from ??.
On pileus: filamentous undifferentiated hyphae 1.8 - 7.2 μm wide, loosely interwoven, frequently branching, plentiful to locally dominant, with with yellowish (sometimes rather sordid yellowish) subrefractive walls, often with walls up to 0.5 μm thick; inflated cells plentiful to locally dominant, colorless to pale yellowish to to pale brown to yellowish brown to brown, terminal singly, globose to subglobose to subpyriform to ellipsoid to broadly ellipsoid to clavate or broadly clavate, sometimes constricted, up to 48 × 39 μm, with walls up to 1.0 μm thick; vascular hyphae not observed. At stipe base: ??. [Note: Any layering of universal veil on pileus was not recorded.—ed.]
As many as two or more additional, potential taxa in
this "group" have been identified genetically.
Morphological data is being gathered to provided
Despite the great similarity between the nrITS of
this species and that of A. texasorora, they
differ within the 5' 5.8S motif in one of the known
variable characters. Since this is a rather
conserved point in a nrITS sequence, this is
unusual within a single species. Hence, we keep the
two names as indicating separate taxa for the time
being although phylogenetic separation is not
—R. E. Tulloss
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1. Amanita sp-V03, Hawn St. Pk., Ste. Genevieve Co., Missouri, U.S.A. RET 516-7
2. Amanita sp-V03, Hawn St. Pk., Ste. Genevieve Co., Missouri, U.S.A. RET 516-7
3. Amanita sp-V03, Hawn St. Pk., Ste. Genevieve Co., Missouri, U.S.A. RET 516-7
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and explanations prepared for this site talk about specimen-observer pairs associated with each data set.
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a single collection inadvertently contains a mixture of taxa.