name | Amanita umbrinidisca |
name status | nomen acceptum |
author | (Murrill) Murrill |
english name | "Dark-Eyed Panther" |
images | |
intro |
Based on the original description of Murrill (1912) and type study by David T. Jenkins (1979). |
cap | The cap of A. umbrinidisca is up to 100 mm wide, yellowish with umbo turning umbrinous in age, honey-like color fading to straw-color on the conspicuously long striate margin, very thin, convex to plano-convex, umbonate, in age the umbo sits in a depression, yellow colored with umbo turning umbrinous in age, honey-like color fading to straw-color on the conspicuously long striate margin. The volval remnants are large, irregular, white patches. |
gills |
The gills are free, not crowded, broad and white. Short gills are truncate. |
stem |
The stem is up to 120 × 10 - 20 mm, narrowing upward, hollow, white or slightly yellowish. The ring is ample, white, persistent, attached above the center of the stem. The volva is white, tough, short, and ocreate. The bulb on the base of the stem is 30 mm wide. |
spores | The spores measure 10.2 - 11.7 × 7.0 - 8.0 (8.6) µm and are ellipsoid and inamyloid. Clamps are absent at bases of basidia. |
discussion |
Originally described from the state of Washington, USA, from fir forests. The inamyloid spores and striate pileus margin definitively contradict Murrill's belief that this species belongs in Amanita sect. Phalloideae. Jenkins (1986) placed the species in what is now called sect. Caesareae; however, examination of the type shows that there is a distinct bulb and that the species belongs in sect. Amanita. The absence of clamps suggests the possibility of a relationship to Amanita pantherina DC. : Fr.) Krombh. although the thin cap flesh suggests the relationship is not very close.—R. E. Tulloss |
brief editors | RET |
name | Amanita umbrinidisca | ||||||||
author | (Murrill) Murrill. 1912. Mycologia 4: 262. | ||||||||
name status | nomen acceptum | ||||||||
english name | "Dark-Eyed Panther" | ||||||||
synonyms |
≡Venenarius umbrinidiscus Murrill. 1912. Mycologia 4: 242. 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. | 169143, 199974 | ||||||||
GenBank nos. |
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holotypes | NY | ||||||||
type studies | Jenkins. 1979. Mycotaxon 10: 195. | ||||||||
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 on original research by R. E. Tulloss. The macroscopic part of the following is based on the protolog of the present species. Data from microscopic observation will be based on the research of Tulloss, unless otherwise noted in the text. | ||||||||
pileus | from protolog: up to 100 mm wide, melleous fading to stramineous over the striae, with umbo yellow in young plants and becoming umbrinous with age, convex to planoconvex, at length depressed, umbonate, moist, glabrous; context fleshy, but drying very thin; margin long?? [drawing deposited with type shows rather short striations—ed.] striate, nonappendiculate; universal veil as large patches, membranous(??), white, irregular. | ||||||||
lamellae | from protolog: free, not crowded, white, broad; lamellulae not described. | ||||||||
stipe | 120 × 10 - 20 mm, white or slightly yellowish, narrowing upward; bulb ?, 30 mm across; context not described; partial veil subsuperior, white, ample, skirt-like, persistent; universal veil as limbate volva, white, with limb rather short, tough, subentire. | ||||||||
odor/taste | not recorded. | ||||||||
macrochemical tests |
none recorded. | ||||||||
basidiospores | from type study of Jenkins (1977, 1979): [-/-/1] 10.2 - 11.7 × 7.0 - 7.8 (-8.6) μm, (Q = 1.31 - 1.56; Q' = 1.46), hyaline, thin-walled, nonamyloid, ellipsoid, often adaxially flattened; apiculus sublateral, cylindric; contents guttulate; color in deposit not recorded. | ||||||||
ecology | Solitary. In Picea [or Abies?] forest. | ||||||||
material examined |
from type study of Jenkins (1977, 1979):
U. S. A.: WASHINGTON— King Co. - Seattle,
1.xi.1911 W. A. Murrill F 414 (holotype, NY). U.S.A.: WASHINGTON—King Co. - ca. Seattle, 20.x-1.xi.1911 W. A. Murrill 414 (holotype, NY), s.d. S. M. Zeller 100 (paratype, ??). | ||||||||
discussion |
This species is not well-understood at present. The honey colors attributed to the pileus call to mind other poorly known Murrill taxa from the Pacific Northwest of the U.S. and (probably) southwestern Canada—A. pantherinoides (Murrill) Murrill and A. praegemmata (Murrill) Murrill (which, following Jenkins (1977) for the present time, is treated herein as a synonym of A. pantherinoides). Jenkins did not compare the above cited taxa with A. umbrinidisca because he did not consider the latter to be assignable to Amanita sect. Amanita. | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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