| name |
Amanita williamsiae |
| author |
Tulloss nom. prov. |
| name status |
nomen provisorum |
| english name |
"Williams' Great 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 based on original research by R. E. Tulloss.
|
| pileus |
85 mm wide, pale yellow (1A2-3), disk becoming brownish with age, campanulate at first, becoming plano-convex, umbonate; context white, yellow under pileipellis, 8 mm thick at stipe, thinning evenly for about half of radius, then a membrane; margin striate (0.4R), nonappendiculate, decurved; universal veil absent. |
| lamellae |
very pale yellow (1A2), up to 8 mm broad; lamellulae truncate. |
| gleba |
double click in markup mode to edit. |
| stipe |
162 × 11.5 mm, white, at first undecorated or with faint longitudinal striations and fibrils, then with fibrils darkening (grayish) with age, narrowing upward, base rounded; context white, hollow to stuffed, with central cylinder 5 mm wide; exannulate; universal veil as saccate volva, white, leathery, voluminous, with limb reaching to 51 mm from stipe base. |
| odor/taste |
Odor and taste not recorded. |
macrochemical
tests |
Spot test for tyrosinase (paracresol) - positive in universal veil, pileipellis, pileus context, and lamellae (other tissues not tested). Test voucher: Tulloss 8-18-84-B. |
| lamella trama |
bilateral, divergent; filamentous undifferentiated hyphae ?? μm wide, sometimes with yellow refractive walls; ??. |
| basidia |
ca. 53 × 14.8 μm, 4-sterigmate, with sterigmata up to 5.2 × 3.0 μm (to 10.5 μm long in immature material), ??; clamps probably absent. |
| basidiospores |
composite data from all material revised by RET &
CRC: [130/6/5] (9.5-) 10.5 - 14.0 (-15.7) × (8.2-)
9.0 - 11.5 (-14.0) µm, (L = 11.0 - 13.4 µm;
L' = 11.5 μm;
W = 9.8 - 11.4 µm; W' = 10.1 μm;
Q = (1.03-) 1.05 - 1.25 (-1.34); Q = 1.11 -
1.18; Q' = 1.13), hyaline, colorless, smooth,
thin-walled, inamyloid, subglobose to broadly
ellipsoid, sometimes expanded at one end, adaxially
flattened, with "giant" spores sometimes present;
apiculus sublateral, cylindric to
truncate-conic; contents granular to mono-
or multiguttulate; pure white in deposit. |
| ecology |
Solitary pr scattered or in small groups. New Jersey: At 14 m elev. In sandy soil with high organic content of Pine Barrens pine-oak (Pinus rigida-Quercus) forest of Atlantic Coastal Plain. New York: At 1± m elev. In sand of Coastal Plain with Pinus and Quercus velutina. South Carolina: At 81 m elev. In sandy soil of area of "scrub oak and 3-needle pine." |
| material examined |
U.S.A.:
DELAWARE—Sussex Co. - ca. Milford,
Prime Hook Nat. Wildlife Ref., Turkle Pond Access Rd.
[38.8217° N/ 75.2632° W, 1 m]. 10.ix.2018
Ethan Crenson s.n. (RET 842-2).
FLORIDA—Marion Co. - Ocala Nat.
For. [29.241° N/ 81.6888° W, 11 m], 5.vii.2013 Justin
Brosey s.n. [mushroomobserver
#138667]
(RET 548-9, nrLSU seq'd.).
GEORGIA—Evans Co. - 6.5 km N of Claxton
[32.1876º N/ 81.8461º W, 38 m], 13.viii.2017 Joe Smith
s.n. (RET 805-2, nrLSU seq'd.).
NEW JERSEY—Atlantic
Co. - Peaslee Fish & Wildlife Mgmt. Area, by
Tuckahoe
R. [39°20'10" N/ 74°51'30" W, 14 m], 18.viii.1984
Gallagher s.n. [Tulloss 8-18-84-B] (RET 052-3,
sporeprint only).
Burlington Co. - Chatsworth, Franklin Parker
Preserve [39.8136° N/ 74.552° W, 30 m],
18-22.vii.2012 John & Nina Burghardt
s.n. (RET 555-3, nrLSU seq'd.); Chatsworth,
Franklin Parker
Preserve, W of north gate [39.8138° N/ 74.5476°
W, 29 m], 22.vii.2012 John & Nina Burghardt
& Igor Safonov s.n. [mushroomobserver
#102465]
(RET 503-5, nrITS &
nrLSU seq'd.), 31.vii.2012 I. Safonov & J. &
N. Burghardt s.n. (RET 610-6), Franklin Parker
Preserve, Red Trail, 17.viii.2014 I. Safonov & N.
Burghardt s.n. (RET 630-1, nrLSU seq'd.).
NEW YORK—Suffolk Co. (Long Isl.) -
Riverhead,
Indian Isl. Co. Pk. [40°55’35” N/ 72°37’33” W, 1 m],
3.viii.2010 Margaret Horman s.n. (in herb. Long Isl.
Mycol. Soc.; RET 464-3), 29.vii.2011 Joel Horman s.n.
(RET 478-5), 1.viii.2011 J. Horman s.n. (RET 478-10),
22.viii.2011 J. Horman s.n. (RET 487-7, spore print
only).
SOUTH CAROLINA—Chesterfield Co. - ca.
Patrick, Sand Hills St. For. [34°33'04" N/ 80°04'15" W,
81 m], 11.x.1995 Wm. Roody s.n. (RET 160-3). |
| discussion |
This species is known from only four sites and is
apparently a species of the Atlantic Coastal Plain of the
U.S.A.
We had difficulty finding the 5' end of nrLSU, but
we were able to see the motif and
some of its context in the fragments of nrITS we
found in data from RET 160-3. The 5' motif
in this species is the 5'-TCTGACCTCAAATCA
variant. Taxa
found to have this variant are listed at the end
of the discussion on the technical tab of the taxon
page for A.
penetratrix. The present
yellow-capped species is one of only two
yellow-capped species known
to date in the larger grouping of taxa with the
stated variant of the nrLSU 5' motif. Otherwise,
such species have caps limited to the
white-gray-brown color range. The other
yellow-capped taxon with the unusual nrLSU 5' motif
is A.
sp-AUS08, which has been found in
semi-rainforest in New South Wales,
Australia.
The present taxon was previously known as
"Amanita sp. 24" in correspondence, keys,
and checklists of RET. |
| citations |
—R. E. Tulloss, C. Rodríguez Caycedo, J. and M. Horman |
| editors |
RET |
|
Spore data sets and their composite