The cap of Amanita parvipantherina
is 35 - 60 mm wide, convex to plano-convex,
nonappendiculate, and having a tuberculate-striate
margin. The cap is grayish to ochraceous, becoming brown
to brownish over disc. The flesh is white. The volva is
present in conical, subconical to granular, dirty white
to grayish to yellowish remnants.
The gills are free, white, and
crowded. The short gills are truncate.
The stem is 40 - 90 × 5 - 10 mm,
subcylindric, and white. The stem bears a weakly
structured pallid annulus. The volva is distributed over
the stem in granular, dirty white to yellowish to grayish
The spores measure 8.5 -11.5 × 6.5
- 8.5 µm and are broadly ellipsoid to ellipsoid and
inamyloid. Clamps are not present at the bases of
The species occurs on soil in mixed
forests with Pine (Pinus). It fruits from July to August in
Yunnan Prov., southwestern China, at 1200-2500 m elev.
24.vii.1998 Zhu L. Yang 2490 (holotype, HKAS 32492)
B. Wolfe et al., Pringle Lab., Harvard
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 material is derived entirely from the protolog of the present taxon.
NOTE: Spore data from papers by Z. L. Yang are presented following his use of the "Times New Roman" face for "Q" and "Q'"—respectively, "Q" and "Q."
from protolog: 35 - 60 mm wide, grayish to ocrhraceous (Light Drab, Buffy Brown, 5B2-3, 5C4-6), becoming brown to brownish (Snuff Brown, Cinnamon-brown, 5D4-6, 5E6-7) over disk, convex to plano-convex, often slightly depressed at center, viscid when moist; context white, unchanging; margin tuberculate-striate (0.27-0.4R), nonappendiculate; universal veil as conical, subconical to granular, small warts, up to 2 mm high, dirty white, grayish to yellowish (Cream Color, Pale Smoke Gray, Cream Buff, 2A1-3, 5B2), randomly arranged, frequently densely placed over disk.
from protolog: free, crowded, white (1A1), with finely fimbriate and floccose edges; lamellulae truncate, plentiful, in 2 - 3 ranks.
from protolog: 40 - 90 × 5 - 10 mm, white (1A1), subcylindric or slightly tapering upward, with apex slightly expanded, fibrillose to subglabrous; context white, loosely stuffed to hollow in center; bulb 10 - 20 mm wide, white to pallid, subglobose to napiform; partial veil superior, pendent from attachment 15 - 25 mm below stipe apex, white (1A1), thin, membranous; universal veil covering upper part of bulb with floccose to granular, dirty white to yellowish or grayish (Cream Color, Pale Smoke Gray, Cream Buff, 2A1-3, 5B2) remnants.
from protolog: Odor indistinct. Taste not recorded.
from protolog: 100 - 150 µm thick; upper layer (60 - 80 µm thick) strongly gelatinized, comprising subradially arranged to somewhat interwoven 3 - 5 µm wide, colorless to subcolorless, moderately gelatinized, filamentous hyphae; lower layer (40 - 70 µm thick) composed of radially and compactly arranged, 3 - 6 µm wide filamentous hyphae, sometimes with intercalary segments inflated to 8 - 10 (-12) µm wide, often with brownish vacuolar pigments; vascular hyphae rare, 3 - 6 µm wide.
not described in protolog.
from protolog: bilateral. Mediostratum 30 - 40 µm wide, composed of long ellipsoid to subfusiform, inflated cells, 90 - 130 × 10 - 30 µm; filamentous hyphae fairly abundant, 2 - 7 µm wide; vascular hyphae rare. Lateral stratum composed of long ellipsoid to fusiform inflated cells, 55 - 100 × 20 - 30 µm, diverging at an angle of 30° - 45° to the mediostratum; filamentous hyphae fairly abundant, 3 - 7 µm wide; clamps lacking.
from protolog: 30 - 40 µm thick, with 2 - 3 (-4) layers of subglobose, ovoid to barrel-shaped cells, 10 - 20 × 8 - 17 µm.
from protolog: On pileus: composed of more or less vertically (at wart base subvertically) arranged elements; inflated cells abundant to nearly dominant, subglobose, ovoid to short ellipsoid (20 - 65 × 10 - 40 µm) or ellipsoid to subfusiform (35 - 60 × 15 - 30 µm), often in chains of 2 - 4, thin-walled to slightly thick-walled, colorless, hyaline to subhyaline; vascular hyphae rare or locally conspicuous, 2 - 7 µm wide. On stipe base and upper bulb: with structure similar to that on pileus, but with elements irregularly arranged and filamentous hyphae more abundant.
from protolog: filamentous hyphae 2 - 7 (-10) µm wide, scattered to fairly abundant in interior, abundant on stipe surface; acrophysalides plentiful, 200 - 410 × 25 - 45 µm; vascular hyphae rare.
from protolog: filamentous hyphae dominating, 2 - 7 µm wide, somewhat loosely and subradially arranged, frequently branching, anastomosing, interwoven, thin-walled, colorless, hyaline; inflated cells fairly abundant to locally abundant, clavate to long ellipsoid (35 - 130 × 10 - 30 µm), occasionally subglobose to ovoid (20 - 45 × 15 - 30 µm), terminal, usually single, rarely in chains of 2 - 3; vascular hyphae rare.
lamella edge tissue
from protolog: as sterile strip, up to 100 µm wide in side view, composed of clavate to broadly clavate to sphaeropedunculate cells (25 - 40 × 10 - 22 µm), terminal or in chains of 2 - 3, thin-walled, colorless, hyaline; filamentous hyphae very abundant, 2 - 5 µm wide, gelatinized, irregularly arranged or more or less running parallel to lamella edge.
from protolog: "Amanita parvipantherina is a member of Amanita [subgenus Amanita] section Amanita (Yang 1997). A few collections cited above were regarded incorrectly as A. pantherina (DC. : Fr.) Krombh., but the latter has more robust basidiocarps with shorter striations on the pileal margin, a short limbate collar on the stipe base and more abundant filamentous hyphae in the white volval remnants on the pileus (Breitenbach and Kränzlin 1995; Yang 1997, unpublished data of Yang studying material from the Netherlands [THE NETHERLANDS: ZUID-HOLLAND—Wassenaar, 2.ix.1979 C. Bas 7474 (L)]). Amanita parvipantherina is similar to A. sychnopyramis f. subannulata Hongo (Hongo 1971) [on this site treated as A. kwangsiensis Y. C. Wang—ed.], but differs from the latter by its somewhat smaller basidiocarps with a superior annulus and larger, broadly ellipsoid to ellipsoid basidiospores. The basidiospores of A. sychnopyramis f. subannulata are mostly globose to subglobose, (6.0-) 6.5 - 8.5 (-9.5) × 6.0 - 8.0 (-9.0) µm, (Q = (1.0-) 1.03 - 1.14 (-1.19), Q = 1.07 ± 0.04) per Yang (1997). In addition, the warts on the pileus of A. parvipantherina are composed of more abundant filamentous hyphae than those of A. sychnopyramis f. subannulata. Amanita parvipantherina also resembles A. sychnopyramis Corner et Bas f. sychnopyramis but differs from the latter by the presence of an annulus, longer basidia, and larger, broadly ellipsoid to ellipsoid basidiospores. The basidia of A sychnopyramis f. sychnopyramis are 26 - 32 × 10 - 11 µm, and the basidiospores of this taxon are globose to subglobose, 6.3 - 8.1 µm, (Q = 1.0 - 1.1) (Corner and Bas 1962)."
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.