| name | Amanita griselloides |
| name status | nomen acceptum |
| author | D. A. Reid |
| english name | "Spider-Web Amanita" |
| images | |
| intro |
The following description is based on Reid (1980). |
| cap | The cap of Amanita griselloides is 60 mm wide, plano-convex, silvery-gray, with a smooth margin. The cap is covered with thin, felty-fibrillose, gray remnants of volva "overlain by a scanty, white, arachnoid weft." |
| gills | The gills are white. |
| stem | The stem is up to 70 × 10 mm and whitish, the somewhat club-shaped base is up to 14 mm wide. Both a ring and a volva are lacking. |
| spores | The spores measure 8.2 - 12.5 × 6.0 - 7.0 (-8.5) µm and are ellipsoid and amyloid. Clamps are absent at bases of basidia. |
| discussion |
This species was originally described from the state of Western Australia. Reid says Amanita griselloides is "virtually indistinguishable in the field from Amanita grisella E.-J. Gilbert & Cleland" and points out the two species are separable by spore shape. The spider-web-like upper layer of volva is unknown elsewhere in Amanita sect. Validae. Reid described both the holotype and a second specimen that he believes was contaxic; both collections have the unusual, entirely hyphal upper layer of the volva. It is also very unusual for a species of sect. Validae to lack a ring on the stem. The present species may not belong in sect.n Validae.—R. E. Tulloss |
| brief editors | RET |
| name | Amanita griselloides | ||||||||||||||||||||
| author | D. A. Reid. 1978. Victorian Naturalist 95: 47. | ||||||||||||||||||||
| name status | nomen acceptum | ||||||||||||||||||||
| english name | "Spider-Web Amanita" | ||||||||||||||||||||
| synonyms |
double click in markup mode to edit. 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. | 308554 | ||||||||||||||||||||
| GenBank nos. |
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| holotypes | K | ||||||||||||||||||||
| selected illustrations | Reid. 1980. Austral. J. Bot., Suppl. Ser. 8: 30, fig. 17(a-c), 64-65, 107. | ||||||||||||||||||||
| 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 from the protolog and from Reid (1980). | ||||||||||||||||||||
| pileus |
type from Reid (1980): 60 mm wide, silvery gray, drying dark gray-brown, plano-convex; margin smooth, naked; universal veilas "thin felty-fibrillose" gray remnants, "overlain by scanty white arachnoid weft." non-type from Reid (1980): 37 - 50 mm wide, dark horn or ashy gray, plano-convex; universal veil as partial covering of thin, gray, felty-fibrillose tissue, in turn covered with thin white arachnoid patches. | ||||||||||||||||||||
| lamellae |
type from Reid (1980): white. non-type from Reid (1980): whitish. | ||||||||||||||||||||
| stipe |
type from Reid (1980): up to 70 × 1.0± mm, white; bulb not distinctly segregated, as "slightly clavate base," up to 14 mm wide, exannulate; universal veil not observed. non-type from Reid (1980): up to 50 × 10 mm; exannulate; universal veil absent. | ||||||||||||||||||||
| odor/taste | not recorded. | ||||||||||||||||||||
| macrochemical tests |
none recorded. | ||||||||||||||||||||
| pileipellis | not described in protolog. | ||||||||||||||||||||
| pileus context | not described in protolog. | ||||||||||||||||||||
| lamella trama | not described in protolog. | ||||||||||||||||||||
| subhymenium | not described in protolog. | ||||||||||||||||||||
| basidia | type from Reid (1980): 40 - 50 × 9 - 10 μm, 4-sterigmate; clamps absent. | ||||||||||||||||||||
| universal veil | type from Reid (1980): On pileus: (a) gray felty-floccose layer: "irregularly orientated mixture of subglobose, ovate and clavate elements up to 90 × 65 μm, with brown sap, intermixed with thin-walled, hyaline, branched hyphae, 2 - 8 μm wide, lacking clamps." (b) white arachnoid superficial layer: "entirely of thin-walled, prostrate hyphae also without clamps." | ||||||||||||||||||||
| stipe context | not described in protolog. | ||||||||||||||||||||
| lamella edge tissue | type from Reid (1980): "not recovered." | ||||||||||||||||||||
| basidiospores |
from protolog: [-/-/-] 8.2 - 12.5 × 6.0 - 7.0 (-8.5) μm, (est. Q = 1.35 - 1.80), amyloid, ellipsoid to elongate; apiculus not reported; contents not reported; color in deposit not reported. non-type from Reid (1980): [-/-/-] 8.8 - 11.5 × 5.0 - 5.8 (-7.0) μm, (est. Q = 1.75 - 2.0), amyloid, elongate; apiculus not reported; contents not reported; color in deposit not reported. | ||||||||||||||||||||
| ecology | non-type from Reid (1980): In "open scrubby area." | ||||||||||||||||||||
| material examined |
from protolog: AUSTRALIA: WESTERN AUSTRALIA—Unkn. LGA - ca. Walpole, 2 km N of Bow River on Hwy. 1, 13.v.1976 D. A. & D. G. Reid, R. Hilton & N. Brittan s.n. (holotype, K). non-type from Reid (1980): AUSTRALIA: WESTERN AUSTRALIA—Shire of Albany - Two Peoples Bay, ca. Albany, 12.v.1976 D. A. & D. G. Reid, R. Hilton & N. Brittan s.n. (??). | ||||||||||||||||||||
| discussion |
from Reid (1980): "This fungus is virtually indistinguishable in the field from A. grisella, but microscopically the two species are readily separable on spore shape." The fact that this species is exannulate in all material revised by Reid suggests that it may not belong in Amanita sect. Validae, which is presently thought to contain only annulate species. Wood's interpretation of A. griselloides (Wood, 1997) appears to us to describe a different species. | ||||||||||||||||||||
| citations | —R. E. Tulloss | ||||||||||||||||||||
| editors | RET | ||||||||||||||||||||
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