name | Amanita whetstoneae |
name status | nomen provisorum |
author | Tulloss, Goldman and Kudzma |
english name | "Whetstone's Amidella" |
images | |
intro | The following is based on original research of RET. |
cap | The cap tends to become tannish with age and is the only known taxon among North American species of section Amidella to do so. |
stem | The stem is long and sometimes sinuous and lacks an annulus. The volval sack is notably elongated and tubular, |
spores | The spores measure (7.0-) 8.8 - 12.0 (-14.1) × (4.2-) 4.8 - 6.5 (-8.2) µm and are ellipsoid to elongate to cylindric (rarely broadly ellipsoid) and amyloid. Clamps are not to be found at the bases of basidia. |
discussion |
Brick-red staining of the volva or other parts of
the fruiting body with injury, exposure, or age is
not prominent in this species. The only
other taxon in section Amidella in
North America with such
a weak oxidation reaction is Amanita peckiana
Kauffman. This latter species has spores that
are dominantly cylindric and, early in the mushroom's
expansion, it has a delicate, but distinct,
ring. A ring is always absent in A.
whetstoneae. The present species is uncommon, but locally plentiful. This is the tallest species in section Amidella in N. America (although all "large" taxa can have occasional, smaller fruiting bodies).—R. E. Tulloss |
brief editors | RET |
name | Amanita whetstoneae | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
author | Tulloss, Goldman and Kudzma nom. prov. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
name status | nomen provisorum | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
english name | "Whetstone's Amidella" | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
etymology | Named in honor of Dr. Mary Snoddy Whetstone (1849-1929) who supplied Peck with the specimen to which he provisionally attached the epithet "whetstonei." Dr. Whetstone was the founder of the Minnesota Mycological Society (1898) and served as its president until 1911. She was a pioneering pediatrician organizing or leading many women’s professional associations as well as working for women’s right to vote and for the Women’s Christian Temperance Union. She played a significant role in the founding of the Minneapolis-St. Paul Children's Hospital. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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 is based on original research of R. E. Tulloss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
basidiospores | [1070/52/43] (7.0-) 8.8 - 12.0 (-14.1) × (4.2-) 4.8 - 6.5 (-8.2) µm, (L = (8.4-) 9.0 - 11.2 (-11.6) µm; L’ = 10.3 µm; W = (4.7-) 5.0 - 6.1 (-6.8) µm; W’ = 5.5 µm; Q = (1.28-) 1.54 - 2.19 (-2.69); Q = (1.61-) 1.66 - 2.04 (-2.13); Q’ = 1.87), colorless, hyaline, thin-walled or with very slightly thickened walls, smooth, amyloid, elongate to cylindrical, occasionally ellipsoid, occasionally slightly constricted, sometimes swollen at one end, often adaxially flattened; apiculus sublateral, truncate-conic, proportionately small; contents guttulate to granular; white in deposit. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ecology |
Solitary to subgregarious. Illinois: In mixed deciduous woods.
Maryland: In mixed forest with Acer, Populus
tremuloides, Pinus (2-needled), Quercus prinus, Sassafras alba.
Massachusetts: Under Pinus.
Minnesota: In sandy
field.
Missouri: In Quercus-Carya forest with
Cornus, Asimina sp., Diosporos
sp., scattered Platanus occidentalis, and
infrequent Juniperus virginiana.
New Jersey: At 31 m elev. and higher. In
mixed deciduous woods including
Quercus.
New York: In mixed woods with Tsuga
canadensis.
North Carolina: In black loam under gravel in
drainage area under Acer rubrum, Q.
alba and Rhododendron sp. or in moist
dark sandy loam under Betula alleghaniensis,
Quercus sp., A. rubrum,
T. canadensis, and Rhododendron sp.
or in moist dark loam with Quercus, B.
allegahniensis, T. canadensis,
and Rhododendron
or in sandy creek bank under Liriodendron
tulipifera, Fagus grandifolia, and
A. rubrum.
Ohio: In Quercus-Carya forest or in
sandy soil in mixed woods.
Pennsylvania: In hardwood forest or in mixed
(Pinus/Quercus) woods.
Tennessee: At 558 - 1190 m elev. In mixed
forest including Quercus.
West Virginia: In loamy clay in forest of
Betula, Quercus, Rhododendron,
T. canadensis, and Pinus strobus. This taxon seems to have a tolerance for rather wet areas. The North Carolina collections from Montreat and Standing Indian Campground were found in the floodplains of rivers; the 1990 collection from Highlands, North Carolina was found in the gravel of a area designed to take the drainage from the eaves of a building. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
material examined |
U.S.A.:
CONNECTICUT—Tolland Co. - Storrs,
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citations | —R. E. Tulloss and N. R. Goldman | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
editors | RET | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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name | Amanita whetstoneae |
name status | nomen provisorum |
author | Tulloss, Goldman and Kudzma |
english name | "Whetstone's Amidella" |
images | |
photo |
RET - (1) ?, U.S.A. (2) Nantahalla National Forest, North Carolina, U.S.A. Patrick Harvey - (3) Forest 44 Conservation Area, St. Louis County, Missouri, U.S.A. (RET 500-4). [Note: Additional photographs of this collection in their original size can be found at mushroomobserver.org #96576.] |
name | Amanita whetstoneae |
bottom links | [ Keys & Checklists ] |
name | Amanita whetstoneae |
bottom links | [ Keys & Checklists ] |
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.