| name | Amanita sp-MD01 |
| name status | cryptonomen temporarium |
| author | Tulloss |
| english name | "Red-Capped Yellow Dust Amanita" |
| images | |
| intro | See the "techtab"—it's very brief—really no more than a summary, itself. |
| discussion | The viewer may wish to compare the present proposed taxon with A. flavoconia G. F. Atk. and A. erythrocephala Neville, Poumarat & Aste. The authors of the latter species became convinced that they had named material of the North American taxon here called sp-MD01 that had been imported to Italy. |
| brief editors | RET |
| name | Amanita sp-MD01 | ||||||||||||||||||||
| author | Tulloss | ||||||||||||||||||||
| name status | cryptonomen temporarium | ||||||||||||||||||||
| english name | "Red-Capped Yellow Dust Amanita" | ||||||||||||||||||||
| GenBank nos. |
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| intro |
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 upon original research by R. E. Tulloss. | ||||||||||||||||||||
| pileus | 29 - 56 mm wide, hemispheric at first, finally planar and sometimes with central depression, red to orange-red, deepest coloration in disk and in incompletely expanded basidiomes, somewhat tacky; context yellow, thin; margin nonstriate, nonappendiculate; universal veil absent. | ||||||||||||||||||||
| lamellae | free, crowded, white to yellowish with yellow edge, forking?; lamellulae mostly short. | ||||||||||||||||||||
| stipe | 65 - 80 × 6 mm, narrowing upward, white to ivory to pale yellow; bulb small, rounded, marginate; context solid to stuffed, white; partial veil superior, yellow and membranous, flaring, or collapsed on stipe and then more orange; universal veil as a yellow powder (sometimes noticeable only as a yellow tint) on margin of bulb. | ||||||||||||||||||||
| odor/taste | Odor musky, mild. Taste not recorded. | ||||||||||||||||||||
| macrochemical tests |
none recorded. | ||||||||||||||||||||
| basidiospores | RET: [60/3/2] (5.0-) 5.5 - 9.0 (-10.5) × (3.8-) 4.5 - 6.5 (-8.2) µm, (L = 6.6 - 7.8 µm; L’ = 7.3 µm; W = 5.3 - 5.8 µm; W’ = 5.6 µm; Q = (1.12-) 1.16 - 1.49 (-1.88); Q = 1.24 - 1.36; Q’ = 1.32), hyaline?, colorless?, smooth, thin-walled? amyloid, often adaxially flattened, subglobose to broadly ellipsoid to ellipsoid, occasionally elongate; contents ??; apiculus sublateral to subapical, cylindrical; ?? in deposit. | ||||||||||||||||||||
| ecology | Maryland: Gregarious in grass under Quercus sp. Ohio: In leaf litter in mixed hardwood forest. | ||||||||||||||||||||
| material examined | U.S.A.: MARYLAND—Wicomico Co. - Fruitland, 419 S Camden Ave., 5.vii.1991 Joseph Paydon 91-97 (RET 012-1). OHIO—Preble Co. - Somers Twp., Swan-Beatty Rd, Pleasant Vineyard Retreat Ctr., sect. 20, 2.viii.1992 M. A. Vincent 5645 (MU; RET 120-9). | ||||||||||||||||||||
| discussion |
See A. H. Smith’s Amanita Ms. under "A. flavoconia var. rubroflammea" (ined.). After reviewing the FWVA material (accompanied by slides), I’m inclined to believe that this entity may fall within the normal variation of A. flavoconia var. flavoconia. Further review of the redder material of A. flavoconia is undoubtedly needed. Amanita erythrocephala Neville, Poumarat & Aste was originally described by the authors as somewhat similar to the present taxon. In their large work of 2004, the authors of erythrocephala argued for the case that they had probably named material of the North American taxon that had been imported to Italy. The following figure provides a comparison of sporographs of the two taxa: The following figure compares the sporographs of the present taxon with A. flavoconia var. flavoconia and var. inquinata: | ||||||||||||||||||||
| citations | —R. E. Tulloss | ||||||||||||||||||||
| editors | RET | ||||||||||||||||||||
Information to support the viewer in reading the content of "technical" tabs can be found here.
| name | Amanita sp-MD01 |
| bottom links | [ Keys & Checklists ] |
| name | Amanita sp-MD01 |
| 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.
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