| name |
Amanita limbatula |
| author |
Bas. 1969. Persoonia 5: 530, figs. 317-320. |
| name status |
nomen acceptum |
| english name |
"Bas' Limbed Lepidella" |
| synonyms |
≡ Amanitopsis pulverulenta Peck. 1907. Bull. New York State Mus. Nat. Hist. 116: 7.
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.
|
| MycoBank nos. |
308566, 168933 |
| GenBank nos. |
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.
|
| holotypes |
NYS |
| type studies |
Jenkins. 1978a. Mycotaxon 7: 39. |
| intro |
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
material.
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 where noted from the revision of Bas (1969); the remainder is based on original research of R. E. Tulloss.
Basidiomes small. |
| pileus |
protolog: 25 - 55 mm wide,white to creamy white, with surface only exposed in one older specimen and then in very limited region near margin and slightly polished, convex to planoconves; context ?; marginuniversal veil entirely covering pileus of younger specimens with pulverulent-subfloccose layer, concolorous with pileus, in older specimens as small vague concolorous or slightly paler felted-subflocculose adnate flat patches. |
| lamellae |
protolog: narrowly adnate to just free, moderately crowded, whitish, up to 5 mm broad, ventricose to subventricose, broadly rounded at pileus margin, with edge entire and subfloccose to glabrous; lamellulae rounded truncate (the shorteset) to attenuate (the longer). |
| stipe |
protolog: 25 - 50 × 5 - 8 mm, subcylindric; bulb submarginate to marginate, , turbinate to subglobose to elongate-ellipsoid, ca. 10 - 20 × 10 - 14 mm; context solid; partial veil thin, incoherent, apicsl, stirate above, leaving few remnants or entirely detersile; universal veil as weakly structured, appressed, whitish submembranous-felted limb, up to 2 mm wide on bulb margin, sometimes disappearing with age. |
| odor/taste |
protolog: Odor weak or lacking. Taste not recorded. |
macrochemical
tests |
none recorded. |
| pileipellis |
protolog: as dense layer of interwoven hyphae, gelatinizing near surface; filamentous hyphae 2 - 8 μm wide; vascular hyphae plentiful in interior. |
| pileus context |
not reported. |
| lamella trama |
protolog: bilateral; probably with terminal inflated cells. |
| subhymenium |
protolog: ramose, becoming more or less coralloid with age. |
| basidia |
protolog: 40 - 50 × 9 - 10 μm, 4- or 2-sterigmate; clamps rather frequent. |
| universal veil |
protolog: On pileus: with elements irregularly disposed, pale yellow to yellow in alkaline solution; filamentous hyphae 3 - 8 μm wide, rather abundant, branching, densest near upper surface; inflated cells globose to ellipsoid )up to 50 × 30 μm, terminal singly or in short chains) or up to 80 × 40 μm (elongate to clavate), with elongate-ellipsoid and clavate cells most common near upper surface. On stipe base: similar to tissue on pileus. |
| stipe context |
protolog: longitudinally acrophysalidic; acrophysalides up to 300 × 40 μm, often with belts of colorless incrustations. |
| partial veil |
not recorded. |
| lamella edge tissue |
few scattered, loose hyphae.
sterile. |
| basidiospores |
protolog: [70/4/1] 9.0 - 11.0 (-13.0) × 4.5 - 5.0 (-6.5) μm, (Q = 1.70 - 2.20 (-2.40); Q = 1.80 - 2.10), colorless, hyaline, thin-walled, amyloid, elongate to cylindric, often slightly enlarged towards base or apex; apiculus not described; contents subguttulate; color in deposit not recorded.
from type study of Jenkins (1978a): [-/-/1]
8.6 - 10.2 × 3.9 - 5.5 μm, (Q = 1.83 - 2.2; Q' = 1.93),
hyaline, thin-walled, amyloid, elongate to cylindric, often adaxially flattened; apiculus sublateral, cylindric, truncate-conic; contents guttulate;
color in deposit not recorded.
NG/RET: [37/1/1] (9.6-) 10.0 - 12.0 (-12.2) × (4.0-) 4.5 - 5.5 μm, (L = 11.0 μm; W = 4.9 μm; Q = (2.0-) 2.09 - 2.44 (-2.63); Q = 2.26), hyaline, colorless, thin-walled, smooth, amyloid, cylindric, adaxially flattened; apiculus sublateral, cylindric; contents dominantly monoguttulate; color in deposit not recorded. |
| ecology |
protolog: Terrestrial.
Pennsylvania: Along grassy path near Quercus. |
| material examined |
protolog: U.S.A.: NEW YORK—Sussex Co. (Long Isl.) - Port Jefferson, 18.viii.1906 C. H. Peck s.n. (holotype, NYS).
from type study of Jenkins (1978a):
U. S. A.: NEW YORK— Suffolk Co. (Long Isl.) - Port Jefferson,
18.viii.1906 C. H. Peck s.n. (holotype, NYS).
NG/RET: U.S.A.: PENNSYLVANIA—Luzerne Co. - Hunlock Crk. [41.9321° N/ 76.0824° W, 430m], 9.viii.2013 David Wasilewski s.n. [mushroomobserver.org 142433] (RET 569-3). |
| discussion |
protolog: "In the box with the type material I found five specimens, one clearly distinct from the others because of a long slender stem without a volval limbon the bulb, narrow, very crowded gills, and microscopical differences.
"Inside the type box I found a loose label similar to that on the outside, except that the word 'type' was lacking, the date was 'Aug. 1906' instead of '18 Aug. 1906' and the words 'Long stem form' were added. Apparently two collections had been put together. The loose label probably belongs to the aberrant specimen (see A. longipes [Bas 1969] p. 459).
"It is possible that, in the tissue at the surface of the patches on the cap, hyphae are still more abundant than in the tissue depicted in [Bas 1969] fig. 318, but the outer surface is moulded and hard to analyze.
"Because of the elongate to cylindric spores, the presence of clamps, and the formation by the volva of a slight limb at the base of the stem, A. limbatula must be placed near A. praelongispora and A. parva. It differs from both in having a less gelatinized pileipellis in connection with which the cap is almost completely covered with pulverulent remnants of the volva, and also in having a very incoherent partial veil that does not form a true ring. Moreover, A. limbatula has shorter and less elongate spores than A. praelongispora and a very thin, appressed, somewaht irregular margin of the cap instead of a sterile, projecting margin as in A. parva." |
| citations |
—R. E. Tulloss and N. Goldman |
| editors |
RET |
|
Spore data sets and their composite