| name | Amanita luteofusca |
| name status | nomen acceptum |
| author | Cleland & E.-J. Gilbert |
| english name | "Thorn-Bush Amanita" |
| images | |
| intro |
The following description is based on Reid (1980). |
| cap |
The cap of Amanita luteofusca is 30 - 56 mm wide, convex then plano-convex with its center slightly depressed. It is viscid when moist, pale umbrinous to gray-brown with a yellowish tint or grayer and darker than Ridgeway's Pinkish-Buff. The volva is rather uniformly distributed flat patches to scales that are farinose, gray (sometimes paler toward the cap margin), most densely placed in the center. A thin, white layer of hyphae, sometimes appearing to be thin paper, may project from the edges of the larger scales or patches. The flesh is thin. |
| gills |
The gills are moderately crowded, adnate, up to 9 mm broad, and white. |
| stem |
The stem is 56 - 80 × 5 - 10 mm, white, rather narrow, stuffed then finally subhollow, moderately narrowing upwards, minutely fibrillose. The base of the stem is narrowly bulbous, but not abruptly so. The ring is membranous, and sometimes left on the cap margin. The volva may be absent from the stem in some specimens, but is present as patches similar to those on the cap on the stem of other fruiting bodies. |
| spores |
The spores measure 7.0 - 11.0 × 7.0 - 9.2 µm and are globose to subglobose to broadly ellipsoid and amyloid. Clamps are absent at bases of basidia. |
| discussion | Originally described from the state of South Australia among thorn bushes. No details are known concerning likely symbionts.—R. E. Tulloss |
| brief editors | RET |
| name | Amanita luteofusca | ||||||||||||||||||||
| author | Cleland & E.-J. Gilbert in E.-J. Gilbert. 1941. Iconogr. Mycol. (Milan) 27, suppl. (2): 333. | ||||||||||||||||||||
| name status | nomen acceptum | ||||||||||||||||||||
| english name | "Thorn-Bush Amanita" | ||||||||||||||||||||
| synonyms |
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. | 284059, 284101 | ||||||||||||||||||||
| GenBank nos. |
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| holotypes | AD | ||||||||||||||||||||
| revisions |
Reid. 1980. Austral. J. Bot., Suppl. Ser. 8: 37, figs. 23(a-g), 72-75, 100, 103. Grgurinovic. 1997. Larger Fung. S. Austral.: 402, fig. 267(a-d). | ||||||||||||||||||||
| 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 based on the protolog of this species, (Reid 1980), and (Grgurinovic 1997). | ||||||||||||||||||||
| pileus | from protolog: 30 - 56 mm wide, pale umbrinous to gray-brown with a yellowish tint (paler than Saccardo's Umber) or grayer and darker than Pinkish-Buff, convex to applanate, often slightly depressed in disc, viscid when moist; context thin; margin not described; universal veil sometimes present as minute, pallid, farinose fragments. | ||||||||||||||||||||
| lamellae | from protolog: adnate with decurrent lines on stipe apex, moderately crowded, white, uniform, 9 mm broad; lamellulae not described. | ||||||||||||||||||||
| stipe | from protolog: 56 - 80 × 5 - 10 mm, white, slightly attenuating, mintely fibrillose; bulb narrow; context stuffed, later partially hollow; partial veil membranous, well-developed, rather prominent; universal veil not distinct. | ||||||||||||||||||||
| odor/taste | not reported. | ||||||||||||||||||||
| 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 |
not described in protolog. from revision of type by Reid (1980): 33 - 51 × 11 - 14 μm, 4-sterigmate, clavate; clamps lacking. from revision of type by Grgurinovic (1997): [8/-/1] 43 - 53 × 14.0 - 17.2 μm, 4-sterigmate, with sterigmata up to 4.0 μm long, clavate or (sometimes) narrowly pedicellate; clamps not seen. | ||||||||||||||||||||
| universal veil |
not described in protolog. from revision of type by Reid (1980): hyphae thin-walled, hyaline, branched, up to 6 μm wide; inflated cells predominating, globose to ovoid, up to 78 × 52 μm. from revision of type by Grgurinovic (1997): filamentous hyphae thin-walled, hyaline, branched; inflated cells dominant, globose or ovoid. | ||||||||||||||||||||
| stipe context | not described in protolog. | ||||||||||||||||||||
| partial veil | not described in protolog. | ||||||||||||||||||||
| lamella edge tissue |
not described in protolog. from revision of type by Reid (1980): [Note: Reid provides no written description of this tissue but his fig. 23c depicts terminal inflated cells from lamella edge tissue that Reid mislabels as "cheilocystidia."—ed.] from Grgurinovic (1997): [23/-/1] inflated cella 21 - 40 × 14.0 - 21 μm, globose to spheropedunculate. [Note: Originally described by Grgurinovic as "veil fragments," most of the tissue here described (and illustrated by the author) appear to be lamella edge cells.—ed.] | ||||||||||||||||||||
| basidiospores |
from measurement of drawn spores in (Gilbert 1940): [1/1/1] 9.4 (-11.5) × 8.2 (-9.5) μm, (Q = 1.15), hyaline, amyloid; apiculus sublateral (per figure); contents not recorded; color in deposit not recorded. [Note: Only one of the drawn spores of this species was in a position approximating lateral view; this was the shortest and narrowest spore of the four drawn. To produce a sporograph, we create artificial ranges as follows: [-/-/1] 9.4 - 11.5 × 8.2 - 9.5 μm, (est. Q = 1.10 - 1.25).—ed.] from type study of Grgurinovic (1997): [50/-/1] 8.2 - 11.4 × 7.0 - 10.2 μ, (L = 10.0 μm; W = 8.6 μm; Q' = 1.20), subglobose to broadly ellipsoid, amyloid; apiculus sublateral (per figure); contents not reported; color in desposit not reported. [Note: We have not estimated a range for Q based on the (Grgurinovic 1997) spore data for this species in order to prevent automatic generation of a sporograph that we believe would be misleading. We evaluated the Amanita spore length and width ranges from (Grgurinovic 1997) in comparison to comparable data published by other authors and often based on revision of the same specimens. This experiment involved a total of 19 descriptions of a total of 13 species from the work of 3 authors. In a range of the form "x - y" of spore length (width) from (Grgurinovic 1997) compared to a range of the form (a-) b - c (-d) of spore length (width) in the other works, the value of "y" was compared to the value of "c" as a ratio. In the case of spore length ranges, on average (per author), the ratio y/c ranged from 1.06 - 1.10 (possibly due to the non-segregation of a "d" value in the ranges of concern). In the case of spore width ranges, on average (per author), the ratio ranged from 1.14 - 1.23 (indicating the probability of compounding causes at play—possibly, the absence of the "d" value in the ranges of concern and failure to restrict spore measurement to spores strictly presenting in lateral view). When sporographs were attempted from the Grgurinovic data, the results were not useful.—ed.] | ||||||||||||||||||||
| ecology | from protolog: On ground in thorny thicket. | ||||||||||||||||||||
| material examined | from protolog, (Reid 1980), and (Grgurinovic 1997): AUSTRALIA: SOUTH AUSTRALIA—Unkn. LGA - Mt. Lofty, 8.vi.1931 J. B. Cleland 4 (holotype, ADW => AD 3080). | ||||||||||||||||||||
| discussion | Reid (1980) and Wood (1997) both provide descriptions for this species based on non-type collections. However, in both cases, the reasoning to justify their interpretations is very minimal, and few tissues were examined in any of the material—type or non-type. Therefore, it seems that restudy of the type is required using modern methodology. | ||||||||||||||||||||
| citations | —R. E. Tulloss | ||||||||||||||||||||
| editors | RET | ||||||||||||||||||||
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Spore data sets and their composite
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