1. Amanita sp-S01, Oconee Co., South Carolina, U.S.A.
The cap of Amanita sp-S01 is 54 - 70+ mm wide, convex, and sometimes markedly umbonate. It is very pale yellowish cream to slightly sordid yellowish, and unchanging when cut or bruised. Its surface is tacky and slightly shiny. Its flesh is off-white and unchanging when cut or bruised. The cap's margin is striate; the ridges between the striations are decorated with minute bumps (are tuberculate). The margin is not appendiculate or is appendiculate with fragments of a thin membranous ring. The volva is absent or appears as scattered pale tan scales.
The gills of Amanita sp-S01 are free to narrowly adnate with decurrent tooth (10× lens). They are close, white in mass and in side view, becoming creamy to tan with age. The short gills are truncate, very plentiful, and have widely varying lengths.
The stem of Amanita sp-S01 measures 87± × 7.5± mm. It is white at first and faintly tannish after handling. The stem narrows upward is satiny above and finely fibrillose below; it becomes somewhat scaly at its base near the bulb. The stem's flesh is whitish, becoming very faintly orangish tan when cut or bruised, and faintly orangish tan in larva tunnels. The stem is stuffed and has a bulb measuring 17.5± × 13.5± mm that is almost globose or ovoid and white. The thin, white ring is short-lived and is sometimes seen in shreds on the edge of the cap. The volva on the stem takes the form of a short, rather weakly structured limb or flap, with a distinct, thickened or rolled edge. This limb extends about two-thirds of the way around the stem's base.
The odor of this species is mild or lacking or (perhaps in age?) slightly fishy.
The spores of this species measure(8.4-) 8.7 - 11.2 (-12.2) × (5.9-) 6.2 - 7.3 (-7.7) µm and are ellipsoid to elongate (infrequently broadly ellipsoid, rarely cylindric) and inamyloid. Clamps are rarely found at bases of basidia.
Before the bulb is unearthed, this taxon gives the strong impression of being a member of sect. Vaginatae.—R. E. Tulloss
Due to delays in data processing at GenBank, some accession numbers may lead to dead pages.
These pages will eventually be made live, so try again later.
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.
54 - 70+ mm wide, very pale yellowish cream (3A2) to slightly sordid yellowish (less gray than 4B4), unchanging when cut or bruised, convex, sometimes markedly umbonate, tacky, subshiny; context off-white, unchanging when cut or bruised, 4 mm thick at stipe, thinning evenly for 80% of the radius, then membranous to margin; margin tuberculate striate (0.35R), nonappendiculate or appendiculate with fragments of thin membranous annulus (sometimes also covering parts of lamellae); universal veil absent or as scattered pale tan scales.
free to narrowly adnate with decurrent tooth (10× lens), close, white in mass and in side view, becoming creamy to tan in age (Vincent 5627), 4 mm broad, thin; lamellulae truncate, very plentiful, of widely varying length.
87± × 7.5± mm, white, faintly tannish after handling, narrowing upward and flaring at apex, satiny above, finely fibrillose below, becoming subsquamulose at base near bulb; context whitish, becoming very faintly orangish tan when cut or bruised, faintly orangish tan in larva tunnels, stuffed, with central cylinder 2.5 mm wide; bulb 17.5± × 13.5± mm, subglobose to ovoid, white; partial veil ephemeral, sometimes in shreds on pileus margin, white, thin, membranous; universal veil limbate, short, submembranous, white, with thickened or rolled edge free for about two thirds of stipe base circumference.
Odor lacking or mild to somewhat fishy (Vincent 5627). Taste not recorded.
36 - 78 × 8.8 - 12.5 (-15.5) µm, 4- or (infrequently) 2-sterigmate, occasionally projecting up to 15 µm beyond surrounding basidioles; clamps not observed.
[100/5/5] (8.4-) 8.7 - 11.2 (-12.2) × (5.9-) 6.2 - 7.3 (-7.7) µm, (L = 9.3 - 10.7 µm; L’ = 9.9 µm; W = 6.5 - 6.8 µm; W’ = 6.7 µm; Q = (1.27-) 1.34 - 1.66 (-2.0); Q = 1.42 - 1.60; Q’ = 1.48), hyaline, colorless, thin-walled, smooth, inamyloid, ellipsoid to elongate, occasionally broadly ellipsoid, rarely cylindric, sometimes swollen at one end, adaxially flattened; apiculus sublateral, cylindric, prominent; contents monoguttulate; white in deposit.
Solitary to gregarious. New Jersey: In Pinus-Quercus barrens, in sandy soil. Ohio: Under Pinus strobus. South Carolina: Solitary to gregarious in red clay of mixed forest including P. echinata, Quercus marilandica, Q. texana (=nuttallii), Q. rubra, Ilex sp., Sassafras albidum, Cornus florida, and Liriodendron tulipifera.
U.S.A.: CONNECTICUT—Middlesex Co. - E. Haddam, Devil's Hopyard St. Pk. [41°28'32" N/ 72°20'25" W, 72 m], 25.ix.1999 George Davis s.n. [Tulloss 9-25-99-Q] (RET 301-2); Salmon River St. For. (West) [41°32’58” N/ 72°27’01” W, 21 m], 30.viii.1997 Leon Chernoff s.n. [Tulloss 8-30-97-C] (RET 268-6), 3.ix.2011 Damon Brunnette s.n. [Tulloss 9-3-11-B] (RET ). New Haven Co. - Cheshire Twp., Sleeping Giant St. Pk. [41°26'02" N/ 72°53'03" W, 179 m], 23.vii.1992 Pat McDonugh s.n. [Tulloss 7-23-92-E] (RET 066-8). Tolland Co. - Hebron, The Hemlocks Nature Educ. Ctr. [41°37’11” N/ 72°23’22” W, 145-160 m], 2.ix.2011 R. E. Tulloss 9-2-11-A (RET 490-9).
MASSACHUSETTS—Middlesex Co. - Groton Conservation Area, 19.viii.1989 M. Bleuker s.n. [Tulloss 8-19-89-E] (RET 246-5).
MISSISSIPPI—Pike Co. - McComb, 8.viii.1999 A. E. Bessette 11030 (RET 317-8).
NEW HAMPSHIRE—Cheshire Co. - Monadnock St. Pk., 18.viii.1989 R. Seelig s.n. [Tulloss 8-18-89-I] (RET 246-6).
NEW JERSEY—Cape May Co. - Belleplain St. For., ca. Dennisville [39°11’22” N/ 74°51’12” W], 6.ix.1986 Don Aufenkamp, Lee Baade & R. E. Tulloss 9-6-86-D (RET 116-9).
NORTH CAROLINA—Transylvania Co. - Dupont St. For., ca. Lake Imaging [35°12.538’ N/ 82°36.94’ W, 704 m elev.], 25.vi.2011 Jay Justice NC-AM-39 (RET 502-7).
OHIO—Preble Co. - Somers Twp., Swan Beatty Rd., Pleasant Valley Retreat Ctr., sect. 20, 29.vii.1992 M. A. Vincent 5627b (MU f39190; RET 121-1).
SOUTH CAROLINA—Oconee Co. - Seneca [34°46'09" N/ 82°57'55" W, 263 m], 27.vi.1985 M. A. King, E. J. Luetkemeier & R. E. Tulloss 6-27-85-F (RET 054-3), 18.vii.1986 Tulloss et al. 7-18-86-A (RET ??), -B (RET ??), -C (RET ??), 19.vii.1986 Tulloss et al. 7-19-86-A (RET ??), 6.viii.1988 unkn. coll.? 8-6-88-D (RET ??).
TEXAS—Newton Co. - Co. Rd. 3062, Lewis prop. [30°42.509’ N/ 93°49.630’ W], 2.viii.2009 David P. Lewis 9156 (RET 461-4).
Before the stipe's bulb is unearthed, basidiomes of this taxon may give the strong impression of belonging to sect. Vaginatae.
Below there are sporographs based on limited existing data that make spore size and shape comparisons between the present "taxon" and the following: A. agglutinata, A. gemmata, A. russuloides, A. sp-N08, A. sp-N19, and A. sp-T22. The reader will not, that among these morphologically similar taxa (as interpreted by RET) and provisional taxa. There may be at least two distinct North American clusters—one appearing to include A. agglutinata, A. sp-N08, A. sp-N19, and A. sp-S01; and the other, A. russuloides (as currently interpreted by RET) and A. sp-T22. The European material provisionally identified with A. gemmata by RET appears to be distinct from both clusters.
[Note: Compare with material previously classified as A. agglutinata, A. russuloides, and species N8, N19, and T22.]—R. E. Tulloss
—R. E. Tulloss
Information to support the viewer in reading the content of "technical" tabs
can be found here.
1. Amanita sp-S01, Oconee Co., South Carolina, U.S.A.
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.