name | Amanita umbrinelloides |
name status | nomen acceptum |
author | A. E. Wood |
english name | "False Umber Amanita" |
intro |
The description is largely based on the original description (Wood 1997). |
cap | The cap of Amanita umbrinelloides is up to 90 mm wide, convex then flattened, finally with the margin flaring up, smooth, dry, vaguely appearing to have radiating hairs imbedded in cap surface, not striate, mouse-gray to dull gray, sometimes with pallid brown shades, with volval remains as scattered, flat patches, felted to membranous, white to off-white to pale gray, paler than the cap. |
gills | Gills are thin, crowded, white to pale gray, with a concolorous margin. The short gills are present in at least one or two series. |
stem | The stem is 110 × 10 mm, equal to slightly enlarged below, more or less smooth to finely fibrillose, white to cream-gray. The ring is flared, membranous, persistent, but sometimes fragile, slightly striate above, and white to gray. The bulb appears to be indistinct in Wood''s material. The base is equal to slightly enlarged and white to pale cream. The volva is present on the bulb as a small but distinct free limb that is membranous and persistent and gray, sometimes reduced, and (in one case) absent [Wood's illustration shows neither bulb nor volva at base of stem]. |
spores | The spores measure (9.0-) 11.4 - 15.0 × (8.4-) 9.9 - 12.6 µm and are subglobose and inamyloid. Clamps are easily seen at bases of basidia. |
discussion |
Wood describes this species from both subalpine woodland and sclerophyll woodland. Subalpine woodland in New South Wales (Australia) includes such tree genera as Acacia, Eucalyptus, Kunzea, Leptospermum, and possibly others (for example, see this sample report on subalpine vegetation in NSW). A sclerophyll forest in the Australian bush is a forest of hard-leaved plants including Eucalyptus in the overstory (wikipedia). The shades of brown and gray in the cap, the membranous grayish limb of the volva, the easily distinguishable clamps on the basidia, large spore size, a ring that sometimes is lost, all strongly suggest a group of species related to Amanita merxmuelleri Bresinsky & Garrido described from Nothofagus forests in Argentina and Chile, South America. Further examination of the potential relationship could be very helpful in understanding the dispersal of formerly Gondwanan mycota.—R. E. Tulloss and L. Possiel |
brief editors | RET |
name | Amanita umbrinelloides | ||||||||
author | A. E. Wood. 1997. Austral. Syst. Bot. 10: 731, fig. 3(a-e). | ||||||||
name status | nomen acceptum | ||||||||
english name | "False Umber Amanita" | ||||||||
MycoBank nos. | 443177 | ||||||||
GenBank nos. |
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holotypes | UNSW | ||||||||
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 entirely on the protolog of this species, which does not meet contemporary standards for Amanita taxonomy. | ||||||||
basidiospores |
protolog: (9.0-) 11.4 - 15.0 × (8.4-) 9.9 - 12.6 μm, (Q = 1.07 - 1.15), subglobose, inamyloid. [Note: Data provided is not sufficient to permit generation of a sporograph.—ed.] | ||||||||
ecology | In sclerophyll forest. | ||||||||
material examined | protolog: AUSTRALIA: NEW SOUTH WALES—Wyong, Watagan St. For., 13.vi.1985 A. E. Wood & F. K. Taeker s.n. (holotype, USNW 85/603). | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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name | Amanita umbrinelloides |
bottom links |
[ Keys & Checklists ] [ Australia/New Zealand List ] |
name | Amanita umbrinelloides |
bottom links |
[ Keys & Checklists ] [ Australia/New Zealand List ] |
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.