1. Amanita pudibunda, drawing of type preserved in liquid, Thailand.
The cap of A. pudibunda is 35 - 45 mm wide, white,
gibbous to convex at first, then convex to pulvinate,
flat over disc, with tomentose to farinose surface
decoration, and a short striate margin (faint but 25% of
the radius in preserved material). The flesh is white.
The volva is present as scattered irregular fragments.
The gills are crowded (as
preserved), white with flesh colored tint in mass, white
in side view, rather broad, rather thick and fleshy, with
a smooth and concolorous edge.
The stem is 80±
- 100± × 9 - 12 mm, white, narrowing upward
evenly, having a series of concolorous rings or broken
rings, pulverulent, with white flesh. The saccate volva
is ample, membranous, rather thick, and whitish with
The spores measure (6.5-) 6.8 -
10.4 (-10.5) × (5.1-) 5.2 - 7.4 (-7.9) µm and are
broadly ellipsoid to ellipsoid to elongate and inamyloid.
Clamps are not observed at bases of basidia.
Amanita pudibunda is known
only from the type collection made in 1957 in Chiang Mai
Prov., Thailand. New collections are very much needed.
Dr. Z. L. Yang and I have discussed
this species and agree that there is the possibility that
it could be a member of Amanita section Amidella
that has lost the amyloid reaction in its
spores. Dr. Bas (1969)
mentioned having seen an Asian species he placed in
section Amidella that had inamyloid spores. Dr.
Yang has similar experience. The species is certainly
rather isolated in sect. Vaginatae. Futher work is needed.—R. E. Tulloss
Illustration (of specimen preserved in liquid): R. E. Tulloss
R. Heim ex R. Heim. 1965. Rev. Mycol. (Paris) 30: 235.
"Bountiful Volva Ringless Amanita"
≡Amanita pudibunda ["pudibonda"] R. Heim nom. inval.1962. Rev. Mycol. (Paris) 27: 146, fig. 6. [Lacking Latin diagnosis. ICBN §36.1]
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.
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
These pages will eventually be made live, so try again later.
PC (in liquid)
Tulloss in Sanmee et al. 2008. Fungal Diversity 32: 108-111.
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 following is based on the above cited prototype and previous work by Heim and, in the case of all microscopic anatomy, the type study of Tulloss in Sanmee et al. (2008).
from type study of Tulloss: 35 - 45 mm wide, white, gibbous to convex at first, then convex to pulvinate, flat over disc, with tomentose to farinose surface decoration; context white; margin short striate (faint, but 0.25R in preserved material), farinose, slightly incurved at least at first; universal veil not described in protologue, but probable source of surface de-coration (see anatomical characters).
from type study of Tulloss: spacing from stipe not noted, crowded as preserved, white with flesh colored tint in mass, white in side view, rather broad, rather thick and fleshy, with smooth and concolorous edge; lamellulae not described.
from type study of Tulloss: 80± - 100± × 9 - 12 mm, white, narrowing upward evenly, having series of concolorous rings or broken rings in apical third (fragile, white, farinose), pulverulent, with pulverulence easily lost below apical third, quickly becoming nearly smooth below, with subtle browning below apical portion [from handling?]; context white, with ample central cylinder ?? mm wide; universal veil as saccate volva, ample, with limb of roughly even height to slightly bilobate, membranous, rather thick, whitish with pinkish brown spots, 32± × 20± mm, 2+ mm thick as preserved, apparently lacking limbus internus in preserved state.
from protolog: Odor subtle, agreeable. Taste sapid.
from type study of Tulloss: comprising colorless suprapellis (445 - 450 µm thick) and subpellis (235± µm thick) with hyphae having brown tinted walls, overall 680 - 685 µm thick, overlaid by nearly uniform layer from inner surface of universal veil (see below); suprapellis comprising gelatinized matrix including loosely interwoven, narrow, filamentous, undifferentiated hyphae seeming to curve up into matrix from subpellis; subpellis with filamentous, undifferen-tiated hyphae up to 9.6 µm wide, branching, often constricted at septa, ungelatinized, with vascular hyphae not observed.
from type study of Tulloss: filamentous, undifferentiated hyphae 4.8 - 14.4 µm wide, branching, plentiful; acrophysalides narrowly clavate, plentiful to dominant, with many subradially arranged, up to 145 × 32 µm or larger, with walls thin or commonly up to 0.8 µm thick, terminal or occasionally in chains; vascular hyphae 6.4 - 12.8 µm wide, scattered, sinuous, orange-brown.
from type study of Tulloss: bilateral, divergent; wcs = 30 - 35 µm; subhymenial base including plentiful inflated cells (clavate to broadly clavate to elongate to ovoid, thin-walled, apparently all intercalary, up to 73 × 30 µm), with angle of divergence from shallow to up to 60 ° or more; central stratum containing plentiful partially inflated intercalary segments up to 14.4 µm wide; filamentous, undifferentiated hyphae 2.1 - 6.4 µm wide, branching, often with granular contents; terminal, divergent inflated cells occasional, of the same form as intercalary cells of subhymenial base; vascular hyphae not observed.
from type study of Tulloss: wst-near = 70 - 90 µm; wst-far = 95 - 100 µm; branching structure comprising short uninflated and partially inflated hyphal segments and small inflated cells, with 10 - 30 µm between bases of largest basidia/-oles and subhymenial base, with 45 - 50 µm between bases of shortest basidia/-oles and subhymenial base, with basidia arising from cells of all types, but most infrequently from inflated cells.
from type study of Tulloss: 39 - 61 × 8.0 - 11.6 µm, 4-sterigmate; clamps not observed.
from type study of Tulloss: On pileus, lower surface attached to pileipellis: nearly uniform layer 20 - 50 µm thick of brownish walled partially gelatinized elements, with all types of elements often having granular contents (see description of pileipellis, above); filamentous, undifferentiated hyphae up to 7.2 µm wide, branching; inflated cells (up to 47 × 11.2 µm or larger), collapsed, narrowly clavate to allantoid, possibly in chains. On stipe base, exterior surface: as rather dense layer to depth of up to 85 µm; filamentous, undifferentiated hyphae 1.0 - 8.0 µm wide, branching, dominantly fasciculate and often in rather broad fascicles, also appearing singly, interwoven in open lattice, but denser than in interior, with many partially gelatinized; inflated cells not observed; vascular hyphae 3.2± µm wide, scattered to rare, fragmented. On stipe base, interior: filamentous, undifferentiated hyphae 3.2 - 11.2 µm wide, branching, plentiful, often fasciculate, thin-walled, with septa occasionally constricted, very loosely interwoven in open lattice, with tip cells sometimes slightly expanded; inflated cells plentiful to locally dominating, thin-walled, up to 105 × 79 µm, occasionally irregularly clavate, usually broadly ellipsoid to subglobose; vascular hyphae 3.2 - 15.2 µm wide, scattered, sinuous; clamps not observed. On stipe base, inner surface: partially gelatinized in some regions, very similar to dark layer on pileipellis surface, from comparatively thin to up to 110± µm thick; filamentous, undifferentiated hyphae 2.4 - 9.6 µm wide, with some intercalary segments up to 14.4 µm wide, frequently branching, dominating, densely interwoven, with almost all in fascicles, frequently septate, with yellow granular contents in 20% NH4OH, with dark brown pigment apparently restricted to cell walls; inflated cells apparently terminal (singly or in short chains), narrowly clavate or allantoid (up to 123 × 32 µm, thin-walled) to pyriform or subglobose (up to 43 × 40 µm or larger, with walls up to 1.6 µm thick), plentiful, often with granular contents as in hyphae; vascular hyphae not observed.
from type study of Tulloss: longitudinally acrophysalidic; filamentous, undifferentiated hyphae 2.4 - 9.6 µm wide, branching, plentiful; acrophysalides dominating, thin-walled, up to 298 × 32 µm; vascular hyphae not observed.
from type study of Tulloss: [20/1/1] (6.5-) 6.8 - 10.4 (-10.5) × (5.1-) 5.2 - 7.4 (-7.9) µm, (L = 8.7 µm; W = 6.0 µm; Q = (1.25-) 1.27 - 1.65 (-1.74); Q = 1.46), hyaline, colorless, with walls very slightly thickened (< 0.5 µm), smooth, inamyloid, broadly ellipsoid to ellipsoid to elongate; apiculus sublateral; contents multiguttulate; color in deposit unknown.
At ca. 1200 m elev. In humus of old Dipterocarpus forest.
THAILAND: CHIANG MAI PROV.—Dôi Suthep, [5.]xii.1957 R. Heim [Th.] 57 (holotype, PC).
from type study of Tulloss: Heim (1962: 148) states that this species was most closely related to the varieties of Amanita annulatovaginata Beeli (from the Republic of Congo) due to the presence of fragile decoration on the upper stipe (suggestive of an annulus) and the shape and size of the spores. ...
Mr. Z. L. Yang (HKAS) has suggested to RET that this taxon might well be placed in section Amidella except for its inamyloid spores. Weak amyloid reaction in spores of one collection of Amidella was reported by Bas (1969: 342)—as Dr. Yang reminds me. The placement of A. pudibunda should be considered an unsettled issue. More material of this taxon with good notes on the fresh state is needed. ...
The holotype is preserved in liquid. Generally speaking, RET found the tissues to be in very good condition.
The parts of the collection data that are presented in brackets do not appear on the herbarium label in PC.
—R. E. Tulloss
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R. Heim ex R. Heim
"Bountiful Volva Ringless Amanita"
1. Amanita pudibunda, drawing of type preserved in liquid, Thailand.
RET - (1) based on type preserved in liquid in the cryptogamic herbarium of the Museum of Natural History, Paris (PC).
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.