| name |
Amanita albiceps |
| author |
Lamoureux nom. prov. (2006). Champignons du Québec 2: 42, fig. 7. |
| name status |
nomen provisorum |
| english name |
"Lamoureux's (Often) White Ringless Amanita" |
| GenBank nos. |
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
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|
| 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 derived from (Lamoureux 2006) and subsequent original research by RET. |
| pileus |
Lamoureux (2006): 30 - 100 mm wide, white, sometimes yellowish or brownish over disc, rounded conic at first, then convex, umbonate; context white; margin nonappendiculate, striate (0.25 - 0.3R); universal veil absent. |
| lamellae |
Lamoureux (2006): whitish or salmon tinted. |
| stipe |
Lamoureux (2006): 60 - 150 × 5 -15 mm, white, smooth or slightly fibrillose; context white, stuffed or hollow; exannulate; universal veil as membranous, saccate volva, white. |
| odor/taste |
Lamoureux (2006): Odor indistinct. Taste not reported. |
macrochemical
tests |
none recorded. |
| pileipellis |
t.b.d. |
| pileus context |
t.b.d. |
| lamella trama |
t.b.d. |
| subhymenium |
t.b.d. |
| basidia |
ca. ?? × 15.5 μm, 4- or infrequently 2-sterigmate, with sterigmata up to ?? × ?? μm. |
| universal veil |
t.b.d. |
| stipe context |
t.b.d. |
| partial veil |
absent. |
| lamella edge tissue |
sterile; t.b.d. |
| basidiospores |
Lamoureux (2006): 9.0 - 11.5 × 8.5 - 11.0 μm.
composite of data from all material revised by RET: [20/1/1] (8.0-) 8.1 - 11.5 (-13.5) × (7.0-) 7.4 - 9.6 (-12.6) μm, (L = 9.9 μm; W = 8.7 μm; Q = (1.07-) 1.08 - 1.22 (-1.31); Q = 1.14), colorless, hyaline, smooth, thin-walled, inamyloid, subglobose to broadly ellipsoid, rarely ellipsoid, adaxially flattened, sometimes with "giant" spores present; apiculus sublateral, cylindric; tontents granulate to mono- or multiguttulate with additional small granules; color in deposit probably white. |
| ecology |
Québec (Lamoureux 2006): : Occasional. Primarily with
Populus, sometimes at forest edge. July
to September. Wisconsion: With
Quercus nigra. |
| material examined |
CANADA:
QUÉBEC—Marguerite-D'Youville
[formerly Lajemmerais] Regional Co. Mun. -
Boucherville, 19.vii.1998 Y. Lamoureux 3225 (CMMF;
RET 521-10, nrITS seq'd.).
U.S.A.:
ARKANSAS—Perry Co. - Lake Sylvia
Recr. Area, 23.viii.2008 Jay Justice AR-AM-13 (RET
435-7, nrITS-LSU seq'd.).
MICHIGAN—Lapeer Co., - Metamora,
Metamora-Hadley Recreation Area [42.9439° N 83.3529°
W, 287 m], 6.ix.2018 Huafang Su s.n. [mushroomobserver
#333841]
(RET 845-2, nrITS-LSU seq'd.).
Macomb Co. - Shelby Twp.m Stony Creek Metropark
[42.7298° N/ 83.0592° W, 253 m], 17.viii.2018 Huafang
Su s.n. [mushroomobserver
#328924]
(RET 845-9, nrITS-LSU seq'd.).
TEXAS—Newton Co. - Bleakwood, Co. Rd. 3062,
Lewis prop. [30°42.509’ N/ 93°49.630’ W, 37 m],
28.ix.2009 David P. Lewis 9322 (RET 463-8, nrITS
seq'd.).
WISCONSIN—Macomb Co. - Shelby Twp., Stony Creek Metropark
[42.7298° N/ 83.0592° W, 253 m], 17.viii.2018 Huafang Su
s.n. [mushroomobsever #328927] (RET 845-8, nrITS-LSU
seq'd.).
Sauk Co. - Mirror Lake St. Pk. [43.5642° N/
89.8179° W, 291 m], 7.ix.2014 Andrew Khitsun s.n.
[mushroomobserver #177275] (RET 667-9, nrITS & rnLSU
seq'd.).
Sawyer Co. - Springbrook,
7.ix.2015 Britt Bunyard s.n. (RET 714-6, nrITS-LSU
seq'd.).
Waukesha Co. - Kettle
Moraine St. For. South [43.0415° N/ 88.4181° W,
310 m], 13.vii.2014 Andrew Khitsun s.n.
[mushroomobserver
#171855]
(RET 670-4, nrITS seq'd.). |
| discussion |
A duplicate collection of this species (from which DNA was extracted) was generously supplied to RET from the herbarium of the Cercle des Mycologues de Montréal by Raymond Archambault at the suggestion of Yves Lamoureux. RET is very grateful for this gift.
At our present level of knowledge, it appears that the
present species is quite distinct genetically from
other white or whitish North American taxa in
the Vaginatae such as A. homolalittenii, A. populiphila, and
A.
rasitabula. Although a sporograph
comparison of species with subglobose spores is
sometimes not satisfactory for segregating them, a
sporograph comparison of the three just cited taxa
with A. albiceps is provided here:
The specimen examined was not yet fully mature and
bore a few giant spores. Additional material is
necessary in order to evaluate further the size and
shape of mature spores.
The present species has also been called "sp-WI03" in
these pages. |
| citations |
Translation of (Lamoureux 2006) from French by RET, who is responsible for any errors.—R. E. Tulloss and Y. Lamoureux |
| editors |
RET |
|
Spore data sets and their composite