Amanita albiceps - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella

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name	Amanita albiceps
name status	nomen provisorum
author	Lamoureux
english name	"Lamoureux's (Often) White Ringless Amanita"
images	1. Amanita albiceps, Metamora-Hadley Recreation Area, Lapeer Co., Michigan, U.S.A. (RET 845-2) 2. Amanita albiceps, Metamora-Hadley Recreation Area, Lapeer Co., Michigan, U.S.A. (RET 845-2) 3. Amanita albiceps (gray specimen), Mirror Lk. St. Pk., Wisconsin, U.S.A. (RET 667-9) 4. Amanita albiceps (gray specimen), Mirror Lk. St. Pk., Wisconsin, U.S.A. (RET 667-9)
intro	The information on this page was derived from the provisional description of Yves Lamoureux (2006).
cap	The basicially white cap sometimes becomes yellowish or brownish in the center. It is 30 - 100 mm wide, rounded conic at first, but finally convex with an umbo. Its flesh is white. The edge of the cap is radially grooved for about one-quarter to one-third of the cap radius. No volva is found on the cap.
gills	Lamoureux reported that the gills of this species are whitish or have a salmon tint.
stem	The white, smooth or slightly fibery, ringless stem of A. albiceps is 60 - 150 × 5 - 15 mm. The stem is stuffed or hollow, and its flesh is white. A memberanaous, white, sack-like volva encloses the stem's base.
odor/taste	Lamoureux reported the odorl of A. albiceps as indistinct. No information about taste is available.
spores	The spores of this species measure (8.0-) 8.1 - 11.5 (-13.5) × (7.0-) 7.4 - 9.6 (-12.6) μm, and are subglobose to broadly ellipsoid (rarely ellipsoid), inamyloid; clamps are not present at bases of basidia.
discussion	Amanita albiceps is presently known only from the Province of Québec where it occurs with poplars for the most part.—Y. Lamoureux and R. E. Tulloss
brief editors	RET

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. These pages will eventually be made live, so try again later.

accession	locus	voucher	source
MT013989	nrITS-LSU	7.ix.2015 Britt Bunyard s.n. (RET 714-6)	S. D. Russell et al., Purdue Univ.
MN963576	nrITS-LSU	17.viii.2018 Huafang Su s.n. (RET 845-9)	S. D. Russell et al., Purdue Univ.
MK085519	nrITS	7.ix.2014 Andrew Khitsun s.n. (RET 667-9)	L. V. Kudzma, Annandale, NJ
MZ314228	nrITS	13.vii.2014 Andrew Khitsun s.n. (RET 670-4)	S. D. Russell et al., Purdue Univ.
MK085519	nrITS-LSU	7.ix.2014 Andrew Khitsun s.n. (RET 667-9)	L. V. Kudzma, Annandale, NJ
KP224316	nrITS	19.vii.1998 Y. Lamoureux 3225 (RET 521-10)	L. V. Kudzma, Annandale, NJ
MN963577	nrITS-LSU	6.ix.2018 Huafang Su s.n. (RET 845-2)	S. D. Russell et al., Purdue Univ.
OR295565	nrITS-LSU	28.ix.2009 D. P. Lewis 9322 (RET 463-8)	S. D. Russell, Ann Arbor, MI
MK085518	nrITS-LSU	7.ix.2014 Andrew Khitsun s.n. (RET 667-9)	L. V. Kudzma, Annandale, NJ
MT013996	nrITS-LSU	17.viii.2018 Huafang Su s.n. (RET 845-8)	S. D. Russell et al., Purdue Univ.
OR296715	nrITS-LSU	23.viii.2008 J. Justice (RET 435-7)	S.D. Russell, Ann Arbor, MI

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

send to graphing tool

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

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Spore data for collections
provisionally identified as: Amanita albiceps Lamoureux

Spore data sets and their composite

Each spore data set is intended to comprise a set of measurements from a single specimen made by a single observer; and explanations prepared for this site talk about specimen-observer pairs associated with each data set. Combining more data into a single data set is non-optimal because it obscures observer differences (which may be valuable for instructional purposes, for example) and may obscure instances in which a single collection inadvertently contains a mixture of taxa.

basidiospore definition

Spore Measurements by Collection

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