| name | Amanita albopulverulenta |
| name status | nomen acceptum |
| author | (Beeli) Tulloss |
| english name | "White Flour Amanita" |
| intro | The following description is based on Beeli (1935). |
| cap | The cap of Amanita albopulverulenta is 40 - 50 mm wide, plano-convex, depressed in the center, umbonate, with a long-striate margin. The white cap is covered with small, pale brownish-gray, flocculent remains of the volva. The flesh is thin, firm, and white. |
| gills | Gills are free, close, white, thin, fragile, pointed at both ends, 5 - 6 mm broad, with an uneven margin. The short gills are nine times more plentiful than normal gills. |
| stem | Its stem is 70 - 90 × 5 - 8 mm, stuffed, cylindric, fibrillose, smooth, and white. The ring is absent. The bulb is very small. The volva is present as a flocculose layer on top of the bulb and whitish. |
| odor/taste | This species lacks an odor. Its taste is reportedly sweet with an acrid aftertaste. |
| spores | The spores measure 4 - 5 × 2.5 µm and are elongate to cylindric and inamyloid. No information is available concerning basidial clamps. Unfortunately, the present species was not treated by Gilbert; and we have no information to compare with Beeli's information on spore size. As noted elsewhere in these pages, Beeli had a tendency to understate the size of small spores. |
| discussion |
The present species was originally described from the Democratic Republic of Congo where a single specimen was found in dry forest. If this species is indeed an Amanita (as seems likely), it appears to be most similar to the group of taxa associated with A. farinosa Schwein. The present species is very poorly known. Based on its apparent similarity to A. farinosa, A. albopulverulenta may lack clamps at the bases of its basidia.—R. E. Tulloss |
| brief editors | RET |
| name | Amanita albopulverulenta | ||||||||
| author | (Beeli) Tulloss in Tulloss et al. 2015. Amanitaceae 1(2): 1. | ||||||||
| name status | nomen acceptum | ||||||||
| english name | "White Flour Amanita" | ||||||||
| synonyms |
≡Amanitopsis albopulverulenta Beeli. 1935. Fl. Champ. Congo 1: 23, pl. 4 (fig. 3).
≡Amanita albopulverulenta (Beeli) Tai. nom. inval. 1979. Syll. Fung. Sinicorum (Peking): 373. [n.v.] [Lacking full and direct reference to basionym (per Index Fung. 5(2): 41). ICBN §33.2. Misapplied.] 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. | 487309, 116166, 516637 | ||||||||
| GenBank nos. |
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| holotypes | BR (implicit) | ||||||||
| 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 of the present taxon. Unfortunately, Gilbert did not revise material of this species in his work on the Amanitaceae. | ||||||||
| pileus | from protolog: 40 - 50 mm wide, white, broadly convex, slightly umbonate; context white, firm, thin, fleshy; margin striate (ca. 0.75R per figure); universal veil as covering of small warts, flocculose, pallid. | ||||||||
| lamellae | from protolog: free, close, white, thin, fragile, acute at both ends; lamellulae not described. | ||||||||
| stipe | from protolog: 70 - 90 × 5 - 8 mm, white, cylindric, smooth, fibrillose; bulb small; context hollow, firm, fibrous, white; exannulate; universal veil on upper surface of bulb, whitish, friable, flocculose. | ||||||||
| odor/taste | from protolog: Odorless. Taste sweet, with acrid aftertaste. | ||||||||
| macrochemical tests |
none recorded. | ||||||||
| pileipellis | not described. | ||||||||
| pileus context | not described. | ||||||||
| lamella trama | not described. | ||||||||
| subhymenium | not described. | ||||||||
| basidia | not described. | ||||||||
| universal veil | not described. | ||||||||
| stipe context | not described. | ||||||||
| partial veil | not described. | ||||||||
| lamella edge tissue | not described. | ||||||||
| basidiospores | from protolog: 4 - 5 × 2.5 μm, hyaline, smooth, inamyloid, ?elongate to ?cylindric, at least sometimes adaxially flattened (per figure); apiculus sublateral (per figure); contents "finely guttulate"; white in deposit. [Note: Inufficient data for sporograph generation. As noted elsewhere in these pages, Beeli frequently underestimated the size of small spores.—ed.] | ||||||||
| ecology | from protolog: Solitary. Terrestrial in dry foreset. | ||||||||
| material examined | from protolog: CONGO, DEMOCRATIC REPUBLIC OF: PROV. EQUATEUR—Territoire Lisala - Binga [2°23'41" N/ 20°25'25" E, 361 m], iv.1931 M. Goossens-Fontana 927 (holotype, BR, watercolor). | ||||||||
| discussion | From the protolog, which includes a reproduction of the watercolor of Mme. Goossens, this species may belong in the editors' provisional Amanita series Farinosae. In this group it is distinguished by at least its apparent lack of pigment and the reported narrowness and small size of its spores. A revision of the type collection is needed. | ||||||||
| citations | —R. E. Tulloss | ||||||||
| editors | RET | ||||||||
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| name | Amanita albopulverulenta |
| bottom links |
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| name | Amanita albopulverulenta |
| bottom links |
[ Keys & Checklists ] [ Subsaharan List ] |
Spore data sets and their composite
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.
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