| name | Amanita rubescens var. congolensis |
| name status | nomen acceptum |
| author | Beeli |
| images |
  1. Amanita rubescens var. congolensis, Zambia or Zimbabwe.  2. Amanita rubescens var. congolensis, Zambia or Zimbabwe.  3. Amanita rubescens var. congolensis, Zambia or Zimbabwe. |
| intro |
The following is based on the description of Beeli (1935) and on data obtained from recent collections, etc. |
| cap |
The cap of A. rubescens var. congolensis is 100 mm wide, thick, soft-fleshed, convex, and is very pallid at first, but then becomes orange-brown to brown-red on exposure. It has a nonstriate margin. Its flesh is white and reddens on contact with air. Its volva often leaves many irregular to truncate-pyramidal warts on the cap; wart color can be grayish buff to reddish brown. |
| gills |
The gills are free, attenuate at both ends, and white. The short gills were not described by Beeli. |
| stem | The stem is 150 × 10 - 12 mm, cylindric, concolorous with the cap, solid, relatively undecorated, and has a narrowly bulbous, rooting base. The stem's annulus is superior, membranous, thin, skirt-like, and white at first becoming brownish. The edge of the annulus may be decorated with small bits of volva. At the stipe base, the friable volva is ephemeral or difficult to collect. |
| odor/taste | The taste is bitter. However, many mushroom-collecting peoples of miombo woodlands such as the Shona and Bemba reportedly enjoy this relatively common species cooked. |
| spores | The spores measure (6.3-) 7.1 - 10.5 (-11.8) × (4.3-) 4.6 - 6.0 (-6.9) µm and are ellipsoid to elongate (rarely broadly ellipsoid or cylindric) and amyloid. Beeli originally reported the spores 6 × 4.5 µm. Clamps are not observed at bases of basidia. |
| discussion |
This species was originally described from Republic of Congo and has been found in several other countries in central Africa. For comparison to other rubescent taxa, see A. brunneolocularis Tulloss, Ovrebo & Halling, A. orsonii Ash. Kumar & T. N. Lakh., A. novinupta Tulloss & J. Lindgr., A. rubescens Pers. : Fr., and A. rubescens var. alba Coker. For distinguishing between rubescent taxa in sect. Validae, refer to the Key of rubescent taxa in Amanita sect. Validae.—R. E. Tulloss |
| brief editors | RET |
| name | Amanita rubescens var. congolensis | ||||||||||||||||||||||||
| author | Beeli. 1935. Fl. Champ. Congo 1: 20, pl. 3 (fig. 4). | ||||||||||||||||||||||||
| name status | nomen acceptum | ||||||||||||||||||||||||
| MycoBank nos. | 517344 | ||||||||||||||||||||||||
| GenBank nos. |
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| holotypes | BR (implicit) | ||||||||||||||||||||||||
| selected illustrations |
E.-J. Gilbert. 1940. Iconogr. Mycol. (Milan) 27, suppl.: tab. 42 (fig. 3). Buyck. 1994. Ubwoba: figs. 56-57. | ||||||||||||||||||||||||
| 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 information below is derived from the protolog, from spore drawings of Gilbert (1940) and from original research of R. E. Tulloss. | ||||||||||||||||||||||||
| basidiospores |
from type per Gilbert (1940): [6/1/1] 7.7 - 9.8 × 5.5 - 6.5 µm, (L = 8.6 µm; W = 5.9 µm; Q = 1.31 - 1.69; Q = 1.45). composite of data from material revised by Tulloss: [120/6/5] (6.3-) 7.1 - 10.5 (-11.8) × (4.3-) 4.6 - 6.0 (-6.9) µm, (L = 7.5 - 9.5 µm; L’ = 8.6 µm; W = 5.0 - 5.6 µm; W’ = 5.3 µm; Q = (1.28-) 1.36 - 1.92 (-2.36); Q = 1.44 - 1.81; Q’ = 1.65), hyaline, colorless, smooth, thin-walled, amyloid, ellipsoid to elongate, infrequent broadly ellipsoid or cylindric, infrequently constricted, adaxially flattened; apiculus sublateral, cylindric; contents mono- or multiguttulate; ?? in deposit. [Note: In the literature, the most reliable information concerning the spores of the type is derived from the text and illustrations (Tab. XXXIV, fig. 3) of Gilbert (1940 & 1941). The best size-shape information is derived from measuring the scale drawings of spores in the above cited figures. Of the six spores drawn from the holotype (fig. 3), all could be interpreted to be drawn in lateral view.—ed.] | ||||||||||||||||||||||||
| ecology | Zimbabwe: Under msasa (??). | ||||||||||||||||||||||||
| material examined |
Beeli (1935): CONGO, DEMOCRATIC REPUBLIC OF: PROV. EQUATEUR—Territoire Lisala - Binga [2°23'41" N/ 20°25'25" E, 361 m], RET:ZAMBIA: COPPER BELT PROV.—off Kitwe-Ndola Rd., Greystone Farm, | ||||||||||||||||||||||||
| citations | —R. E. Tulloss | ||||||||||||||||||||||||
| editors | RET | ||||||||||||||||||||||||
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| name | Amanita rubescens var. congolensis |
| bottom links |
[ Keys & Checklists ] |
| name | Amanita rubescens var. congolensis |
| bottom links |
[ Keys & Checklists ] |
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.
Text and User-Generated Sporographs are published under the Creative Commons License.
All other images are © 2011, Rodham E. Tulloss unless otherwise indicated in context.
In the case of a taxon page, image credits are on the 'image' tab.