| name | Amanita variicolor | ||||||||||||||||||||||||||||||||
| author |
Lamouruex ex Lamoureux in Lambert et al.
(2018)
MycoKeys 38: 52, fig. 2. Lamoureux nom. prov. 2006. Champignons du Québec 2: 50, figs. 15-16. | ||||||||||||||||||||||||||||||||
| name status | nomen acceptum | ||||||||||||||||||||||||||||||||
| english name | "Piebald Ringless Amanita" | ||||||||||||||||||||||||||||||||
| MycoBank nos. | 827344 | ||||||||||||||||||||||||||||||||
| GenBank nos. |
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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 not from the protolog of the present species or from (Lamoureux 2006) is based on the notes and photographs of collectors and original research of RET. | ||||||||||||||||||||||||||||||||
| pileus |
protolog: 40 – 100 mm wide,
olive-yellow, straw-yellow, bronze, olive brownish
to brown-black, then tinged with olive or
orange-yellow towards
margin, at times darker in the center and over
inner ends of marginal striations, ovoid to rounded
conic at first, then planar with an umbo, smooth;
context not
described;
margin striate (0.15 - 0.35R),
nonappendiculate; universal veil often as
small to large grey or orange-grey
flakes, detersile.
[Note: Text supplemented from
illustrations.—ed.] Lamoureux (2006): 40 - 100 mm wide, rounded conic at first, then plano-convex, with umbo, with margin white at first, otherwise having irregular blotches of varied pigmentation (olive-yellow, with or without orange tint away from the center and, often darker to fuscous (predominantly toward the center); context whitish; margin striate; universal veil occasionally absent, otherwie in irregular warts and small patches, white at first becoming gray with age, felted-submembranous, friable, subdetersile. RET: ca. 65 mm wide, with pigment irregularly distributed in ill-defined blotches (white near margin, light orangish tan, olivaceous (or grayish yellow) tan, with darker brown near disc), campanulate at first; context whitish, unchanging, ca. 4 mm thick over stipe, thinning for ?? of radius, as membrane at margin; margin nonappendiculate, striate (0.15 - 0.25R) in young material), slightly incurved at first; universal veil in irregular patches irregularly disposed near disc, sometimes confluent, submembranous-felted, pallid at first, becoming gray. | ||||||||||||||||||||||||||||||||
| peridium | double click in markup mode to edit. | ||||||||||||||||||||||||||||||||
| lamellae |
protolog: free, subcrowded,
whitish to greyish or with salmon tint;
lamellulae not
described. Lamoureux (2006): white, grayish, or with a salmon tint. RET: free with decurrent line on upper stipe, subcrowded, orangish white or pinkish white in mass, off-white in side view, 3 mm broad (young material); lamellulae subtruncate, unevenly distributed, of diverse lengths, plentiful. [Note: The lamellae often become gray or grayish in age in those taxa of the Vaginatae having a graying, submembranous-felted-friable universal veil.—ed.] | ||||||||||||||||||||||||||||||||
| stipe |
protolog: 100 - 200 ×
8 - 17 mm, flocculose and white at first, typically
covered by chevron-forming rusty-orange
fibrils on whitish background when mature, cylindric;
context white, unchanging when cut or bruised;
exannulate; universal veil
friable, palce ochre to gray to grayish orange to
orange-grey to reddish rusty,
often in one or several strips or patches near stipe
base. [Note: Text supplemented based on
images.—ed.] Lamoureux (2006): 100 - 200 × 8 - 17 mm, decorated with fibrils in "flame" pattern (gray-brown, brown-olive, or with orange tint; context whitish; exannulate; universal veil as basal cup (often orange-tan with age) and as ring of submembranous-felted-friable fragments, above the stem base, gray gaining orangish tint. RET: 100 × 11 mm, white, narrowing upward, not flaring at apex (young material), with dense covering of raised white fibrils (young material) becoming slightly orange-brown when touched or on exposure, becoming darker brown with time; context white, unchanging, hollow, with central cylinder ca. 7 mm wide; exannulate; universal veil as cupulate base, with appressed patches on lower stipe, white at first, becoming orangish tan at stipe base, with highest point on patch ca. 22 - 25 mm from stipe base, ca. 1.5 mm thick, somewhat flexible at first, soon submembranous-felted-friable. | ||||||||||||||||||||||||||||||||
| odor/taste |
protolog: Odor not
distinctive. Taste not
recorded. Lamoureux (2006): Odor indistinct. Taste not recorded. RET: Odor lacking. Taste not recorded. | ||||||||||||||||||||||||||||||||
| macrochemical tests |
none recorded. | ||||||||||||||||||||||||||||||||
| pileipellis | protolog: Suprapellis gelatinized; hyphae 2.5 - 6.0 μm wide, radially orientated. Subpellis, ungelatinized; filamentous hyphae 4 - 12 μm wide; inflated cells cylindrical to fusiform, 50 - 100 × 13 - 24 μm, often in chains; vascular hyphae 7 - 10 μm wide occasional. [Note: The inclusion of inflated cells is unusual for a pileipellis in section Vaginatae. These could be inlated segments of hyphae or could be part of a transitional zone below the pileipellis proper. The description should be reviewed.—ed.] | ||||||||||||||||||||||||||||||||
| pileus context | protolog: filamentous hyphae (4-) 5 - 12 μm wide, more or less branching, with some inflated intercalary cells; acrophysalide subfusiform to fusiform 40 – 110 × 10 – 33 μm often in chains; vascular hyphae 7 - 10 (-12) μm wide, sometimes inflated, rarely branching. [Note: Vascular hyphae are rarely inflated. For one thing they have no septa; so there are not intercalary cells. They do spring leaks or break; and the material exuded is difficult to differentiate from the rest of the hypha.—ed.] | ||||||||||||||||||||||||||||||||
| lamella trama |
protolog: bilateral; filamentous
hyphae 2 - 6 μm wide, hyaline, thin-walled;
inflatecd cells cylindro-clavate to clavate to
fusiform to subfusiform, abundant, 28 - 40 (-55) ×
13 - 20 μm; vascular hyphae rare. RET: ??; vascular hyphae 3.6 - 5.7 μm wide. | ||||||||||||||||||||||||||||||||
| subhymenium |
protolog: inflated cells
irregular to globose to subglobose 11 - 20 (-25) ×
(6-) 10 - 15 μm. RET: pseudoparenchymatic (cellular); ??. | ||||||||||||||||||||||||||||||||
| basidia |
protolog: 48 – 65 × 14 – 19 μm,
clavate, 4-sterigmate, with sterigmata up to 8.5 μm
long; clamps absent. RET: 48 - 58 × 13.8 - 16.0 μm, 4-sterigmate, with sterigmata up to 5.8 × 4.2 μm; clamps not observed. | ||||||||||||||||||||||||||||||||
| universal veil | protolog: filamentous hyphae 4.5 – 7.5 μm wide; inflated cells 25 - 60 μm wide, singly terminal or in chains, subglobose to globose; vascular hyphae rare to absent. | ||||||||||||||||||||||||||||||||
| stipe context |
protolog: filamentous hyphae
4 - 13 μm wide away from surface, 3 - 5 (-6) μm wide
near or at surface; acrophysalides 150 - 350 ×
20 - 35 μm and in chains
[?sic] away from
surface, 50 - 90 (-120) × (12-) 16 - 23 μm and with
reddish brown intracellular pigment near or
at surface; vascular hyphae, occasional,
7 - 10 μm wide. [Note: Acrophysalides in
Amanita
are singly terminal on filamentous hyphae except in a
very few species—predominantly the
amycorrhizal species
of sect. Vittadiniae.—ed.] RET: longitudinally acrophysalidic. | ||||||||||||||||||||||||||||||||
| partial veil | absent. | ||||||||||||||||||||||||||||||||
| lamella edge tissue |
protolog: not described. RET: sterile. | ||||||||||||||||||||||||||||||||
| basidiospores |
protolog: [180/3/3] (8.2-)
9.8 – 11.5 (-13.3) × (7.1-) 8.8 – 10.7 (-12.2) μm,
(Q= 1.0 – 1.20 (-1.30); Q' = 1.09), hyaline,
smooth, inamyloid, cyanophilous, globose to
subglobose; apiculus not described;
contents monoguttulate; color in
deposit not recorded. Lamoureux (2006): 8.5 - 12.0 × 8.0 - 11.5 μm. composite of all data from material revised by RET: [60/2/2] (7.2-) 9.5 - 11.4 (-13.5) × (6.5-) 8.5 - 10.7 (-13.5) μm, (L = 10.4 μm; L' = 10.4 μm; W = 9.4 - 9.8 μm;W' = 9.7 μm; Q = 1.03 - 1.14 (-1.15); Q = 1.07 - 1.10; Q' = 1.08), hyaline, colorless, smooth, thin-walled, inamyloid, globose to subglobose, often adaxially flattened; apiculus sublateral, cylindric; contents mono- to multiguttulate with additional small granules; white in deposit. | ||||||||||||||||||||||||||||||||
| ecology |
protolog: Usually solitary, sometimes scattered
to gregarious, in stands of conifers (Abies, Picea,
Pinus, Tsuga) mixed with Betula, on sub-hydric to
mesic soil, never seen in plantations. Lamoureux (2006): Common. In Abies forest including Betula. July to September. RET: Maine: Solitary. At ca. 65 m elev. In dark loam over sandy-rocky soil in mossy forest dominated by Picea glauca and including Betula sp., Acer rubrum, Vaccinium sp., Cornus canadensis, and Medeola virginiana. | ||||||||||||||||||||||||||||||||
| material examined |
protolog:
CANADA:
ONTARIO—Algonquin Provincial Park,
1.x.2007 M. Didukh and B. Dentinger (paratype,
TRTC156902, Genbank MG734655).
QUÉBEC—Lac-Beauport, Chemin de la
Chapelle, 22.viii.2010 H.
Lambert (HL0852).
Matawinie Region. Co. Mun. - Rawdon,
9.viii.2003 Yves Lamoureux 3787 (holotype,
CMMF003787, GenBank MG734656),
Québec, Base de plein air La Découverte,
15. iii.2010 H. Lambert (paratype,
HL0846).
Sacré-Soeur-sur-le Fjord, Rivière Sainte-Marguerite,
fosses 3, 4, 5, 17.viii.2008 H. Lambert (paratype,
HL0257, Genbank MG734657).
Sacré-Soeur-sur-le Fjord, Parc Saguenay, 2015 H. Lambert
(paratype, HL051). RET: CANADA: QUÉBEC—Matawinie Region. Co. Mun. - Rawdon, 9.viii.2003 Yves Lamoureux 3787 (holotype, CMMF003787; isotype RET 521-8), 19.viii.2003 Y. Lamoureux 3463 (CMMF; RET 521-4, nrITS seq'd.). U.S.A.: MAINE—Washington Co. - Steuben, Eagle Hill Inst., ca. lodge [44°27.573' N/ 67°55.914' W, 67 m], 26.viii.2014 Zaac Chavez s.n. [Tulloss 8-26-14-G] (RET 635-5). | ||||||||||||||||||||||||||||||||
| discussion |
A submembranous to friable volva that turns gray on exposure and aging places A. variicolor in a group of taxa near A. rhacopus in section Vaginatae. A third species from Quebec is known for this group—A. sp-QUE03. While species with globose to subglobose spores can be difficult to compare by means of sporographs, such a comparison of the three named species is offered here: The multi-colored pileus with colors altering as the basidiome matures is reminiscent of the pileus of A. xanthomitra; however, the coloration in the latter species is associated with distinct, ring-like zones, rather than the colors in vaguely bordered areas giving the blotchy appearance of the present taxon. | ||||||||||||||||||||||||||||||||
| 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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