3. Amanita wellsii, faded specimens - Maine, U.S.A. - Dr. S. S. Ristich
4. Amanita wellsii - Prov. Ontario, Canada - Walter Sturgeon
5. Amanita wellsii - Pennsylvania, U.S.A.
The following description is based on the description of Jenkins (1977). Additional observations from RET are included.
The cap of A. wellsii is 30 - 130 mm wide, globose to convex, eventually plano-convex to planar, zinc-orange to ochraceous-salmon, fading to near antimony yellow, remaining darker in the center, dry to viscid when moist, with a striate margin (less than 20% of the cap radius) in age. The margin often extends past the gills (a so called sterile edge). The "volval remnants are present as irregularly distributed, delicate warts to soft squamules or patches of easily removable floccose material, often forming a tomentum on the margin"; the volval remnants are yellowish-buff to cadmium yellow, paler after exposure to sunlight, and are rarely whitish. The flesh is white, except yellow just below the cap skin. Faded specimens are depicted in the third and fourth photographs, above.
The gills are white at first, becoming pale cream to Naples yellow, free or adnexed, crowded, widest nearer the margin, yellow floccose at the edge, with an occasional, faint, decurrent, floccose line on the top of the stem. The short gills are truncate, plentiful, of diverse lengths, and unevenly distributed.
The stem is 70 - 160 × 5 - 20 mm, tapering upward, expanded at the top, pale yellow (darkens from handling), stuffed or hollow, with delicate and fragmentary volval remnants—often loosely woven, evanescent, floccose patches or as a distinct yellow line around the bulb. The ring is superior, very delicate, loosely woven, evanescent, often torn away and partially remaining on the edge of the cap. The basal bulb is 15 - 27 mm wide, up to 29 mm long, ovoid to subglobose to ellipsoid to broadly clavate or somewhat turnip shaped, and pallid. The flesh is white.
The taste is mild with lingering unpleasantness. No odor is present.
The spores measure (8.7-) 10.5 - 13.8 (-18.0) × (4.9-) 5.6 - 8.4 (-10.8) µm and are ellipsoid to elongate, infrequently cylindric, and inamyloid. Clamps occur at 3 - 7% of bases of basidia/basidioles. [Jenkins (1977) reported infrequent clamps in the volva.]
Originally described from New Hampshire, USA, the current known range of A. wellsii extends from the Appalachian Mountains in North Carolina to the northern limit of the distribution of alder in Canada (David Malloch, pers. corresp.). It has also been reported growing in commercial blueberry (Vaccinium) fields in Maine (Samuel Ristich, pers. corresp). RET has recently received material of A. wellsii from Newfoundland's Avalon Peninsula (Andrus Voitk, pers. corresp.) where it was found in a dwarf willow (Salix)-dwarf birch (Betula) coastal heath barren. RET believes this is a first report from such a habitat. In northern Quebec Prov., Canada, the species is sometimes found growing within blueberry bushes, with diverse tree taxa relatively close by (e.g., Betula, Pinus, Populus, etc.).
The editors of this site owe a great debt to Dr. Cornelis Bas
whose famous cigar box files of Amanita nomenclatural information
gathered over three or more decades were made available to RET for computerization
and make up the lion's share of the nomenclatural information presented on this site.
genitive of Latinized name, "Wells'" or "of Wells"
Jenkins. 1977. Biblioth. Mycol. 57: 78.
Wartchow, Tulloss and Cavalcanti. 2009. Mycologia 101: 867. [partial]
The following text may make multiple use of each data field.
The field may contain magenta text presenting data from a type study
and/or revision of other original material cited in the protolog of the present taxon.
Macroscopic descriptions in magenta are a combination of data from the protolog and
additional observations made on the exiccata during revision of the cited original
The same field may also contain black text, which is data from a revision of the present
taxon (including non-type material and/or material not cited in the protolog).
Paragraphs of black text will be labeled if further subdivision of
this text is appropriate.
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 data presented below is based on original research of R. E. Tulloss.
83 - 130 mm wide, salmon to orange to yellow-orange to red-orange, sometimes unevenly pigmented, sometimes becoming more evenly pigmented (and very slightly browner) by maturity, hemispheric at first, then convex to broadly convex, sometimes uneven, tacky to subviscid to viscid when moist, rather dull when tacky, becoming subshiny when dry; context white except for yellow band 2 - 3 mm thick just below pileipellis, unchanging when cut or bruised, 5.5 - 10 mm thick, thinning evenly for 85 - 95% of radius, then membranous to margin; margin sometimes nonstriate at first, eventually short striate (0.05R - 0.2R), incurved at first, decurved at maturity, sterile; universal veil as friable warts or powdery layer (sometimes suggesting universal veil of A. flavoconia), bright yellow, becoming sordid pale cream or sordid very pale tan upon exposure and drying in situ, detersile.
free without decurrent line on stipe apex, crowded, cream in mass, white in side view, 7 - 14 mm broad, broadest near midpoint; lamellulae truncate, of diverse lengths, unevenly distributed, plentiful.
79 - 90 × 11.5 - 15 mm, white to pale yellow, becoming brown to nearly black from handling (especially on raised fibrils), finely pulverulent above parital veil, fibrillose below it, longitudinally striatulate, slightly narrowing upward or cylindric, flaring just at apex; bulb white, ellipsoid to broadly clavate, 21 - 29 × 19 - 27 mm; context white at first, becoming brownish where nearby surface has bruised, with larva tunnels concolorous or with brownish tint, firmly stuffed with dense white material, with central cylinder 3 - 9 µm wide; partial veil subapical to superior, white to yellowish white to pale yellow, sometimes more strongly pigmented below, nonstriate above and below, subpulverulent below, submembranous, weakly structured, sometimes with yellow bits of universal veil attached to underside at edge; universal veil as scattered to confluent warts or small patches, bright yellow, fading as on pileus, detersile.
Odor lacking. Taste not recorded.
Spot test for syringaldazine (laccase) - rapidly positive then slowly fading in base of bulb (otherwise negative throughout basidiome) in incompletely expanded specimen; negative throughout basidiome in mature specimen. Spot test for tyrosinase (paracresol) - positive except for central cylinder of stipe, much of bulb (excluding base and region below central cyinder), most of pileus context except in region above and slightly broader than stipe, and much of gill surfaces in incompletely expanded specimen; positive except for central cylinder of stipe, much of gill surfaces and base of bulb in mature specimen. Test voucher: Tschekunow s.n. (29.x.1998).
from type study of Jenkins (1979): [-/-/1]
11.0 - 12.6 × 6.3 - 7.9 μm, (Q = 1.48 - 2.00; Q' = 1.63),
hyaline, thin-walled, nonamyloid, ellipsoid to cylindric, often adaxially flattened; apiculus sublateral, cylindric; contents guttulate;
color in deposit not recorded.
[415/20/15] (8.7-) 10.5 - 13.8 (-18.0) × (4.9-) 5.6 - 8.4 (-10.8) µm, (L = (10.4-) 10.6 -
13.0 (-13.2) µm; L’ = 11.9 µm; W = (5.3-) 6.4 - 7.6 (-8.6) µm; W’ = 7.1 µm; Q = (1.39-) 1.50 - 1.94 (-2.62); Q =
(1.52-) 1.62 - 1.76 (-1.92); Q’ = 1.69), inamyloid, smooth, thin-walled, hyaline, colorless, ellipsoid to elongate to cylindric, often adaxially flattened, occasionally expanded at one end, occasionally as giant spores; apiculus sublateral, pronounced, truncate-conic to cylindric; contents multiguttulate; ?? in deposit.
Québec: On sandy soil in mixed woods including (e.g.) Alnus, Betula, Populus, Vaccinium, etc. Newfoundland & Labrador: At 0 - 61 m elev. In heaths (e.g., coastal heath barren) containing dwarf Betula, Empetrum, dwarf Salix, Vaccinium spp., etc. Maine: At 25 - 225 m elev. In blueberry (Vaccinium) patch on sand terrace with Alnus, Acer rubra, Salix, and Spirea or in commercial blueberry field with no other nearby woody plants. New Hampshire: Under Tsuga canadensis and Pinus strobus. New Jersey: At 15 - 250 m elev. In duff and loam under Tsuga canadensis near Gomphidius glutinosus (Schaeff. : Fr.) Fr.
[Note: It is possible that Vaccinium was present in all the cases cited.]
from type study of Jenkins (1979):
U. S. A.: NEW HAMPSHIRE— Sullivan Co. - Springfield,
1.ix.1917 W. A. Murrill s.n. (holotype, NY 66719).
CANADA: NEWFOUNDLAND & LABRADOR—Isl. of Newfoundland - Avalon Peninsula, Cape Saint Mary’s [46°49'23" N/ 54°11'44" W, 0-61 m], 28.ix.2005 A. Voitk s.n. (in herb. Voitk; RET 387-5).
QUÉBEC—Région Capitale-Nationale - Lac-Saint-Joseph, Chez Denis [46°56' N/ 71°38' W, ca. 170 m], 30.vii.1967 R. L. Shaffer 5604 (MICH). Région Saugenay-Lac-Saint-Jean - Route 155 S of Lac-Bouchette, W of km 199, 1.ix.2006 Romain Labrie s.n. [Tulloss 9-1-06-B] (RET 395-6, nrITS seq'd.).
U.S.A.: CONNECTICUT—Unkn. Co. - unkn. loc., ix.1984 Aaron Norarevian 9-84-AN1 (RET 234-1).
MAINE—Cumberland Co. - Freeport, Wolfe’s Neck St. Pk. [43°49'28" N/ 70°05'15" W, ca. 25 m], 7.ix.1984 student of S. S. Ristich s.n. [Tulloss 9-7-84-SSR] (RET 237-10 p.p.); N. Yarmouth, Sligo Rd., 5.ix.1984 S. S. Ristich s.n. [Tulloss 9-5-84-SSR] (RET 237-10 p.p.); N. Yarmouth, 3.ix.1988 S. S. Ristich s.n. [Tulloss 9-3-88-SSR1] (RET 001-5). Hancock Co. - Mt. Desert Island, 8.viii.1991 Arleen Bessette 8-8-91-AB1 (RET 030-8). Oxford Co. - Greenwood, Locke Mills, N of Portland on Route 26 [44°24'00" N/ 70°42'07" W, 225 m], 23.viii.1986 S. S. Ristich 8-23-86-SSR1 (RET 466-1); Grafton Notch St. Pk., 25.viii.1985 S. S. Ristich s.n. [Tulloss 8-25-85-SSR1] (RET 211-5). Unkn. Co. - unkn. loc., 2/3.viii.1988 S. S. Ristich s.n. [Tulloss 8-2/3-88-SSR1] (RET 045-4).
MASSACHUSETTS—Worcester Co. - Leominster, 21.ix.1947 R. Singer s.n. (FH); Westborough, 2.viii.2011 Dr. Laszlo Nagy 5019 (SZMC; RET 646-3, nrLSU seq'd.).
NEW HAMPSHIRE—Hillsborough Co. - Fox St. For., ca. Valley Tr., 6.ix.1959 O. K. Miller 526 (VPI as "A. volvata"). Unkn. Co. - unkn. loc., 24.ix.1989 member Montshire Mycol. Club s.n. (RET 016-3)
NEW JERSEY—Mercer Co. - Kingston, Delaware & Raritan Canal towpath, 0.2 km from Kingston entrance toward Rocky Hill [40°22'35" N/ 74°37'05" W, 15 m], 3.x.1999 Neal Macdonald s.n. [Tulloss 10-3-9-NM1] (RET 302-1). Sussex Co. - Stokes St. For., Struble Rd. [41°11'05" N/ 74°48'19" W, ca. 242 m], 29.x.1998 H. Tschekunow s.n. (RET ??)
PENNSYLVANIA—Schuylkill Co. - Locust Lk. St. Pk. [40°46'44" N/ 76°08'05" W, ca. 423 m], 21.ix.1996 J. A. Lankalis s.n. (RET 259-1). Sullivan Co. - 8-10 km S of Lopez, tr. parall. Splashdam Pond on upr. Main Branch Mehoopany Crk., tr. head W of Rte. 407 [41°24'12" N/ 76°16'44" W, ca. 622], early ix.2008 David Wasilewski s.n. (RET 421-9).
—R. E. Tulloss
Information to support the viewer in reading the content of "technical" tabs
can be found here.
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.