name | Amanita lutescens |
name status | nomen acceptum |
author | Hongo |
english name | "Hongo's Gray Yellowing Lepidella" |
images | |
intro |
The following is based on the description of Bas (1969). All flesh is white at first and becomes yellow when the fruiting body is cut or broken. |
cap |
The cap of Amanita lutescens is 35 - 60 mm wide, convex then plano-convex or plane, finally slightly concave, gray, dry, with a nonsulcate, appendiculate margin. The cap is densely covered with very small, darker, brownish gray, pulverulent-subflocculose warts. |
gills |
The gills are rather distant, narrowly adnate to free, rather broad (5 - 8 mm), and pale cream. The short gills are rounded-attenuate to attenuate. |
stem |
The stem is 35 - 70 × 4 - 8 mm, subcylindrical, and solid. It is white and striate above the annulus and gray and puverulent-flocculose to pulverulent-squamulose. The annulus is superior and membranous, white and striate on the upper side, and grayish flocculose on the lower side. The stipe bears a small globose bulb. |
odor/taste |
The fruiting body has a strong odor and a mild taste. |
spores |
The spores measure (7.5-) 8 - 10 (-10.5) × (5.0-) 5.5 - 7.0 (-7.5) µm and are amyloid and broadly ellipsoid to ellipsoid. Clamps are absent at bases of basidia. |
discussion |
Amanita lutescens was described from Japan. Bas placed the present species in
his stirps Cinereoconia (see A. cinereoconia G. F. Atk. var. cinereoconia).
Bas felt that the present species was not closely related to A. griseofarinosa Hongo
of the same stirps because of its broader spores, more or less pulverulent layer of volva on the
cap, and a more friable annulus. Because of my experience with yellowing taxa in North America that appear to be
"diseased" specimens of other taxa (see
A. subolitaria (Murrill) Murrill). Note that such specimens often have their
spore shape distorted. I am inclined to be suspicious that A. lutescens may prove to be synonymous
with A. griseofarinosa. After all, A. cinereoconia itself has both pulverulent and warted
volval remnants on the pileus according to environmental circumstances. Moreover, the fact that Bas proposed a
yellowing variety of A. cinereoconia might be taken as suggesting that taxa of stirps Cinereoconia
are liable to the "yellowing syndrome." On the page for A. cinereoconia, I discuss a recent collection
of that species that indeed seemed normal at first, but developed the yellowing syndrome. |
brief editors | RET |
name | Amanita lutescens | ||||||||
author | Hongo. 1958. J. Jap. Bot. 33: 347, fig. 2(c-d). | ||||||||
name status | nomen acceptum | ||||||||
english name | "Hongo's Gray Yellowing Lepidella" | ||||||||
synonyms |
non Amanitopsis lutescens Boud. (a taxonomic synonym of Amanita gemmata) 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. | 292454 | ||||||||
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 | TNS [per Doi. 1991. Bull. Natl. Sci. Mus., Tokyo, Ser. B 17(2): 50] | ||||||||
type studies | Z. L. Yang and Y. Doi. 1999. Bull. Natl. Sci. Mus. Tokyo B 25(3): 118-119, fig. 16. | ||||||||
revisions | Bas. 1969. Persoonia 5: 470, figs. 223-225. | ||||||||
selected illustrations | Imazeki and Hongo. 1987. Color. Illus. Mushr. Japan 1: 130, pl. 32 (fig. 224). | ||||||||
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 not directly from the protolog of the present taxon and not cited as the work of Dr. Z. L. Yang or another researcher is based upon original research by R. E. Tulloss. NOTE: Spore measurements from papers by Z. L. Yang use his "Times New Roman" face for "Q" and "Q'"—respectively, " | ||||||||
basidiospores |
Yang and Doi (1999): [60/2/1] (7.5-) 8.0 - 10.0 (-10.5) × 5.5 - 7.0 (-7.5) μm, ( From revision of Bas (1969): [20/2/1] 8.0 - 10.0 (-10.5) × 5.5 - 6.5 μm, (Q = (1.2-) 1.35 - 1.65; Q = 1.45 - 1.50), colorless, thin-walled, amyloid, broadly ellipsoid to ellipsoid, [infrequently elongate—ed.]; contents hyaline to subgranular. | ||||||||
ecology | Yang and Doi (1999): Gregarious. Japan: Under frondose trees or "in deciduous as well as coniferous woods" (Bas 1969). | ||||||||
material examined |
from protolog: JAPAN: HONSHU—Shiga-ken - Ôtsu-shi, Hie Shrine, 20.ix.1956 T. Hongo 1529 (holotype, in herb. Hongo => TNS F-237278). Yang and Doi (1999): JAPAN: HONSHU—Shiga-ken - Ôtsu-shi, Hie Shrine, 20.ix.1956 T. Hongo 1529 (holotype, in herb. Hongo => TNS F-237278). From (Bas 1969): JAPAN: HONSHU—Shiga-ken - Ôtsu-shi, Terabe, 12.vii.1963 T. Hongo 2723 (L). | ||||||||
discussion |
The holotype specimen rehydrates poorly. It was not possible to discern whether or not there were clamps at the bases of basidia (Yang and Doi, 1999). This species is known only from Japan. The Japanese name for this species is "iro-gawari-hebi-kinoko" (Doi 1991). | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
Information to support the viewer in reading the content of "technical" tabs can be found here.
name | Amanita lutescens |
name status | nomen acceptum |
author | Hongo |
english name | "Hongo's Gray Yellowing Lepidella" |
images | |
drawing | Dr. C. Bas (1969) (reproduced by courtesy of Persoonia, Leiden, the Netherlands) based on a watercolor of Dr. T. Hongo. |
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.