| name |
Amanita sp-S04 |
| author |
Tulloss |
| name status |
cryptonomen temporarium |
| 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 derived from original research of R. E. Tulloss. |
| pileus |
80 - 120 mm wide, white, sometimes with slight browning over disc at or after maturity, hemispheric at first with incurved margin, then irregularly convex with downcurved margin, eventually concave, sometimes becoming rimose, tacky to dry, shiny; context white, not changing when cut or bruised, 7-10 mm thick over stipe, thinning evenly to margin; margin nonstriate, not appendiculate (except sometimes with fragments of partial veil); universal veil absent or as white small and very thin detersile fibrillose flakes near margin. |
| lamellae |
free to narrowly adnate without decurrent line on upper stipe, subcrowded to crowded, white to cream in mass, white to off-white in side view, unchanging when cut or bruised, 7.5 - 8 mm broad, lozenge-shaped, with some reverse forking noted, infrequently anastomosing; lamellulae truncate, rounded truncate, subtruncate to subattenuate to attenuate. |
| stipe |
100 - 163 × 11 - 20 mm, white, browning from handling, usually cylindric, occasionally subsinuous, floccose/flocculose above mid-height, fibrous/fibrillose below, overall finely longitudinally striatulate; bulb globose to subglobose to broadly fusiform, 26 - 29 × 20 - 27 mm; context solid, white, unchanging when cut or bruised, with larva tunnels concolorous when present; partial veil apical, white, membranous to submembranous, persistent, skirt-like, with smooth to faintly striate upper surface, flocculose below; universal veil limbate, white, membranous, with exterior having feel of soft leather, with interior surface white and finely fibrillose, 37 - 50+ mm from highest point of limb to very base of bulb, eventually collapsing against stipe; limbus internus not apparent or very small with floccose rim in mature material, in button as floccose wedge (when seen in cross-section) between partial veil and stipe. |
| odor/taste |
Odor "chlorine," "faint chlorine and not like other species of the Phalloideae [sickly sweet smell of decay]," or "chloride of lime." Taste not recorded. |
macrochemical
tests |
KOH solution on pileus: negative. Paracresol spot test for tyrosinase - In overmature material, slowly palely positive in expanding area of stem and central cap in perios 5 - 24 min. after application. In mature material, negative after 4 min. and strongly positive in bulb and most of lower stem at 14 min; in partially expanded button, positive in bulb and lower stipe after 5 min. and remaining so after 13 min. Syringaldazine spot test for laccase - In overmature material, no reaction. in mature material, no reaction; in partially expanded button, positive in center of bulb after 6 min., remaining positive after 14 min. Test vouchers: Tulloss 11-28-85-F, 10-25-86-C, and 10-25-86-L. |
| lamella trama |
bilateral, divergent, ... |
| basidia |
34 - 51 × (5.5-) 7.0 - 11.0 μm, dominantly 4-, also 3- and 2-sterigmate, with sterigmata up to ??; clamps not observed. |
| lamella edge tissue |
sterile |
| basidiospores |
[165/7/5] (7.3-) 8.4 - 11.2 (-13.5) × (4.0-) 5.5 - 6.8 (-8.5) µm, (L = 9.0 - 9.7 (-10.3) µm; L’ = 9.6 µm; W = 5.9 - 6.3 µm; W’ = 6.0 µm; Q = (1.30-) 1.41 - 1.83 (-2.0); Q = 1.50 - 1.60 (-1.69); Q’ = 1.58), hyaline, colorless, smooth, thin-walled, amyloid, ellipsoid to elongate, sometimes bean-shaped, rarely cylindric, frequently adaxially flattened, sometimes expanded at one end; apiculus sublateral, cylindric; contents granular; white in deposit. |
| ecology |
Solitary to moderately abundant. South Carolina: In red clay of Pinus-Quercus forest with mixed scrub understory. Texas: In Pinus-Quercus forest in sandy soil with duff/litter or in dark loamy soil. |
| material examined |
U.S.A.:
INDIANA—Lawrence Co. - Lake Monroe, Deam Wilderness [38.9762° N/ 86.3518° W, 210 m], 26.ix.2012 Stephen Russell s.n. [mushroomobserver #111311] (RET 534-6).
SOUTH CAROLINA—Oconee Co. - Seneca, 28.xi.1985 R. E. Tulloss 11-28-85-F (RET 131-4).
TEXAS—Hardin Co. - Big Thicket Nat. Preserve, Jack Gore Baygall Unit, area near rd. FM 2937, 20.ix.1981 D. P. Lewis 2815 (F 1070754); Big Thicket Nat. Preserve, Lance Rosier Unit, 25.x.1986 Texas Mycol. Soc. foray participant s.n. [Tulloss 10-25-86-C] (RET 468-1). Unkn. Co. - Big Thicket Nat. Preserve, unkn. loc., 25.x.1986, Texas Mycol. Soc. foray participant s.n. [Tulloss 10-25-86-L] (RET 468-6).
WEST VIRGINIA—Greenbrier Co. - woods above rest stop on U.S. Rt. 60 c. 1 mile W of Charmco, 9.viii.1990 M. A. Vincent 4382 (MU F38509; RET 146-5). |
| discussion |
It is possible that RET simply segregated the
narrowest spored specimens of Amanita elliptosperma in
forming the concept of this possible taxon.
Efforts are under way to clarify this
situation.
The following sporographs compare the present
species
with A. elliptosperma and
A.
magnivelaris:
|
| citations |
—R. E. Tulloss |
| editors |
RET |
|
Spore data sets and their composite