name | Amanita instannea | ||||||||||||||||||||||||||||||||||||||||||||||||||||
author | Tulloss, S. D. Russell et al. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
name status | nomen provisorum | ||||||||||||||||||||||||||||||||||||||||||||||||||||
etymology |
in-, particle used to negate an adjective +
stannea, "tin" or "like tin" specifically, not like the species A. stannea A. H. Sm. nom. prov.—the name of which has been misapplied to the present species. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
GenBank nos. |
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intro |
The following text may make multiple use of each
data field. The field may contain magenta text presenting data from a type study and/or revision of other original material cited in the protolog of the present taxon. Macroscopic descriptions in magenta are a combination of data from the protolog and additional observations made on the exiccata during revision of the cited original material. The same field may also contain black text, which is data from a revision of the present taxon (including non-type material and/or material not cited in the protolog). Paragraphs of black text will be labeled if further subdivision of this text is appropriate. 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. Information below is from examination of dried basidiomes, genetic studies by L. V. Kudzma, and other original research of R. E. Tulloss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
pileus | margin nonappendiculate, short striate; universal veil not present. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
stipe | universal veil as robust saccate volva, often with rusty stains, with volva sometimes separated into membranous or submembranous fragments by basidiome expansion, sometimes with these fragments become rusty, brown, or sordid. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
odor/taste | neither recorded. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
macrochemical tests |
none recorded. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
basidia | 4-sterigmate... | ||||||||||||||||||||||||||||||||||||||||||||||||||||
stipe context | longitudinally acrophysalidic; ... | ||||||||||||||||||||||||||||||||||||||||||||||||||||
partial veil | absent. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
lamella edge tissue | sterile. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
basidiospores | [80/4/3] (9.6-) 10.1 - 14.0 (-15.0) × (7.5-) 8.8 - 12.5 (-13.5) μm, (L = 11.2 - 12.3 μm; L' = 11.7 μm; W = 9.9 - 11.0 μm; W' = 10.3 μm; Q = (1.04-) 1.06 - 1.25 (-1.39); Q = 1.11 - 1.15; Q' = 1.13), hyaline, colorless, smooth, thin-walled, inamyloid, subglobose to broadly ellispoid to (infrequently) ellipsoid, adaxially flattened, sometimes narrowing toward one end; apiculus sublateral, cylindric; contents guttulate; color in deposit not recorded. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
ecology | At 1889-2835 m elev. In grove of Populus tremuloides or with Pop. tremuloides and Pinus ponderosa or with Pop. tremuloides and Picea or with Pop. tremuloides and mixed conifers.. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
material examined |
U.S.A.:
ARIZONA—Apache Co. - Apache Nat. For.
[35.2374º N/ 109.5725º W, 1889 m], 15.viii.2016 Terri
Clements & Donna Fulton TAC 1522 [mushroomobserver
#248703]
(RET 770-8, nrITS-LSU seq'd.); White Mtns., ca. Greer,
Udall Knoll [33.9072º N/ 109.4085º W, 2835 m],
26.vii.2016 Britt Bunyard s.n. (RET 734-8, nrITS-LSU
seq'd.).
Coconino Co. - San Francisco
Peaks, 30.viii.1994 Jack S. State AEF 1089 (MICH
on extended loan to RET, nrITS & nrLSU seq'd.),
31.viii.1994 Jack S. States AEF 1093 (MICH on extended
loan to RET, nrITS seq'd.), AEF 1095 (MICH on extended
loan to RET, nrITS & nrLSU seq'd.), AEF 1096 (MICH on
extended loan to RET, nrITS & nrLSU seq'd.).
COLORADO—Gunnison Co. - Crested
Butte, | ||||||||||||||||||||||||||||||||||||||||||||||||||||
discussion |
We were able to segregate this taxon
phylogenetically using nrITS and
nrLSU sequences. Unfortunately, we have little information about characters observed on fresh material. Notes in the packets indicate that photos were taken of AEF1093 and AEF1096. Some caps have retained an orangish tint. The basidiomes can be rather large and have some rusty stains on the cupulate or saccate or fragmented volva that are reminiscent of species such as A. fulva, A. nishidae, and A. populiphila. A recent nrLSU tree of the Vaginatae included the present species as sister to a small grouping including branches representing A. sp-MN03 and A. populiphila. The hypothetical proximity to A. populiphila is interesting because at least one specimen of the present species (RET 372-8) was originally mistaken for A. populiphila on morphological grounds. This is further evidence that the cap of A. sp-AZ28 is off-white and may have a tendency to stain orangish or rusty and that the volva of the latter species is friable and stains as the cap does. A comparison of the spores of the present species to those of A. populiphila and A. sp-MNO3 follows: | ||||||||||||||||||||||||||||||||||||||||||||||||||||
citations | —R. E. Tulloss | ||||||||||||||||||||||||||||||||||||||||||||||||||||
editors | RET | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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