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 cited as the work of another researcher is based on collectors' notes and photographs, molecular studis of Dr. L. V. Kudzma, and other original research of R. E. Tulloss.
35 - 44 mm wide, whitish to pale cream, sometimes with pinkish or pale orangish tint; context 6 mm thick above stipe; margin nonappendiculate, striate (0.30 - 0.35R); universal veil absent or as single calyptra over disc, ca. 20 mm wide.
whitish with orangish or pinkish tint.
100 - 112 × 8 - 8.5 mm, whitish to pale cream with or without a tint of pink or pale whitish orange; context not described; exannulate; universal veil as saccate volva, white to whitish, ca. 15 mm from base to highest point on limb.
Newfoundland and Labrador: in loam among moss
in mixed woods with
Abies balsamea, Betula, Larix,
Picea, and (occasionally) Alnus. Maine:
With mixed conifers and
Betula or among moss under A. balsamea
in mixed woods or in mixed woods with Betula,
Acer, Picea, Juniperus, Abies
balsamea, Pinus resinosa, and P. strobus.
CANADA: NEWFOUNDLAND AND
LABRADOR—Island of Newfoundland - Holyrood,
Butter Pot Prov. Pk. [47.4037° N/ 53.0582° W, 154 m],
25.ix.2007 Andrus Voitk
07.09.25.AV01 (RET 691-9, nrITS & nrLSU seq'd.);
Corner Brook, Humber Village, 13 Balsam Ave.,
18.viii.2005 Andrus Voitk s.n. (RET 388-3,
Corner Brook, Humber Village,
9.ix.2007 A. Voitk 07.09.09.av01 (RET 417-9,
Corner Brook, Humber Village, Kawajich
prop., 21.viii.2005 Andrus Voitk 05.08.21.AV01
nrITS & nrLSU seq'd.).
PAAMIUT—NE of median part of head of
Eqaluit fjord [ca. 200 m], 15.viii.1998 Torbjørn
Borgen TB 98.145 (RET 294-6, nrLSU seq'd.);
Qassit qinngua (head of fjord)
[62.2667° N/ 49.3000° W, 50 m], 22.viii.1982
Torbjorn Borgen Lindhart & Henning Knudsen
[Borgen 82.85] (RET 139-4, nrITS seq'd.).
Co. - N. Yarmouth, 25.ix.1998 S. S. Ristich s.n.
(RET 289-2, nrITS & nrLSU seq'd.).
Hancock Co. - East Hancock, S of Schoodic Bay, tr.
to Donnell Pond [44.5763° N/ 68.1325° W, 55 m],
11.ix.2013 Igor Safonov s.n. [mushroomobserver
(RET 578-3, nrITS seq'd.).
Washington Co. - Grand Lake Stream Region
[45.1572° N/ 67.8436° W, 78 ], 27.vii.2015 Terri A.
Clemens & Donna Fulton TAC1213
(RET 716-6, nrITS & nrLSU seq'd.);
Lubec, 24.vii.2014 T. Clements TAC599
#171121] (RET 633-1, nrITS
Pembroke, 11.viii.2013 T. Clements & Donna
Fulton TAC147 [mushroomobserver
(RET 575-9, nrITS seq'd.).
York Co. -
Kennebunk, Kennebunk Plains Wildlife Management
Area [43.4041 N/ 70.6195 W, 56 m], 4.vii.2014 L. V.
Kudzma 14044 (RET 665-10, nrITS seq'd.).
In the field, some of the material collected in
this provisional taxon was mistaken for
rasitabula, while other material was
mistaken for A.
homolae. Molecular studies show the
material examined for this provisional taxon to
have a common nrITS sequence.
Undoubtedly the confusion with A. homolae
occurs in cases in which a whitish orange or pink
tint appears in the pileus coloration of A.
kryorhodon. Spore data sample sizes are
small for both of these taxa, so some caution must
be taken when comparing the spore shape and
dimensions of the two provisional species.
The following figure compares the sporographs of
the present species and A. homolae:
Given existing DNA data, the present species is
separable molecularly from other whitish-capped
species of section Vaginatae known to occur in
eastern Canada and the northeastern U.S. There
are several caveats there, and these are necessary
because the research is just beginning and has a
very long way to go. Apparently genetically
distinct taxa covered in these pages include those
listed above and A.
cremeosorora (with a distinctly weakly
structured universal veil). There is
molecular evidence for other taxa that are
generally simiar to those mentioned here, but we do
not know enough about the organisms to include them
on this site at the present time.
This taxon was briefly called "Amanita
sp-N62" on this site.
—R. E. Tulloss and L. V. Kudzma
Information to support the viewer in reading the content of "technical" tabs
can be found here.
Tulloss & Kudzma
"Frost Rose Ringless Amanita"
1. Amanita kryorhodon, Kennebunk Wildlife Management Area, Kennebunk, York Co., Maine, U.S.A. RET 665-10
2. Amanita kryorhodon, with cap a bit dark in this image, Kennebunk Wildlife Management Area, Kennebunk, York Co., Maine, U.S.A. RET 665-10
3. Amanita kryorhodon, Pembroke, Washington Co., Maine, U.S.A. RET 575-9
4. Amanita kryorhodon, East Hancock, Hancock Co., Maine, U.S.A. RET 578-3
L. V. Kudzma - (1-2) Kennebunk Wildlife Management Area, Kennebunk, Maine, U.S.A. (RET 665-10)
T. Clements and D. Fulton - (3) Pembroke, Washington County, Maine, U.S.A. [Note: This image is used with permission. Other images of this collection appear at original size and uncut here.]
I. Safonov - (4) East Hancock, Hancock County, Maine, U.S.A. [Note: This image is used with permission. Other images of this collection appear at original size and uncut here.]
Spore data for collections provisionally identified as: Amanita kryorhodon Tulloss & Kudzma
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.