name | Amanita rhoadsii var. flavotingens |
name status | nomen acceptum |
author | Bas |
intro | The following description is based on the original description by Bas (1969). |
cap | The cap of Amanita rhoadsii var. flavotingens is 65 mm wide, plano-convex, white, turning yellow when bruised, dry, with a nonstriate margin. The cap is completely covered with a powdery to somewhat finely fibrillose volval layer, sometimes with fluffy, floccose, small warts near the center. The flesh is white and turns yellow when cut. |
gills | The gills are crowded, touch the stem, rather narrow, white, yellow when bruised. The short gills are attenuate. |
stem | The stem is 80 × 10 mm, solid, white, yellow where bruised, covered with floccose material, lacking a ring, cylindric. The bulb is elongate-radish-like and 40 × 25 mm. The volva is present as some vague, friable fragments on the top of the bulb. The flesh is white, turning yellow when cut, at length turning reddish brown. |
odor/taste | The taste is mild. The odor is slightly pungent but not of decaying protein ("chloride of lime"). |
spores | The spores measure 10 - 12 × 3.5 - 4.5 µm and are cylindric to bacilliform, slightly yellowish, and amyloid. Clamps are present at bases of basidia. |
discussion |
This species was originally collected from Florida (USA). The tree association is unknown.
Among the differences from the type variety are the yellowing reaction, the strong gelatinization of the cap surface including cap flesh below the volval remnants, the alteration of the odor, the spores are shorter, and the length to breadth ratio is not reported to exceed 3.2. RET questions the taxonomic value of this variety because the yellow staining (with the eventual transition to red-brown in the stem) suggests the "yellowing syndrome" seen in other species of section Lepidella in Eastern North America. The unusual degree of gelatinization (decay?) of the cap and the reduction in size of spores are other characteristics that suggest this specimen was diseased. For more notes on the "yellowing syndrome" see A. subsolitaria (Murrill) Murrill.—R. E. Tulloss and L. Possiel |
brief editors | RET |
name | Amanita rhoadsii var. flavotingens | ||||||||
author | Bas. 1969. Persoonia 5: 499, figs. 267, 268. | ||||||||
name status | nomen acceptum | ||||||||
synonyms |
≡Venenarius flavescens Murrill. nom. nud. 1951. Univ. Florida Agric. Exp. Sta. Tech. Bull. 478: 24. 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. | 347747 | ||||||||
GenBank nos. |
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holotypes | FLAS | ||||||||
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 text is derived from the protolog of Bas (1969: 499). According to Bas: "The macroscopical characters in the ... description ar taken from an unpublished note by Murrill, present in the library of the University Herbarium at Ann Arbor [ed.—MICH] and apparently meant to be published in Mycologia." | ||||||||
basidiospores |
Bas (1969): [25/1/1] 10.0 - 12.0 × 3.5 - 4.5 μm, (Q = 2.5 - 3.2: Q = 2.75 - 3.0), slightly yellowish, cylindric to bacilliform; apiculus not described; contents guttulate: color in deposit not recorded. from type study of Jenkins (1979): [-/-/1] 10.2 - 11.7 × 3.9 μm, (Q = 2.62 - 3.00; Q' = 2.92), hyaline, thin-walled, amyloid, cylindric to bacilliform, often adaxially flattened; apiculus sublateral, cylindric; contents guttulate; color in deposit not recorded. [Note: Because Jenkins provided only a single measurement for spore width, no sporograph can be generated.—ed.] | ||||||||
ecology | Bas (1969): "Terrestrial under 'Phoenix canariensis' [Hort. ex Chabaud] in Florida." | ||||||||
material examined |
Bas (1969): U.S.A.: FLORIDA—Alachua Co. - Gainesville, Univ. campus, 10.vi.1950 W. A. Murrill F 21676 (holotype, FLAS). from type study of Jenkins (1979): U. S. A.: FLORIDA— Alachua Co. - Gainesville, 10.vi.1950 W. A. Murrill F 21676 (holotype, FLAS). | ||||||||
discussion |
RET suggests that this taxon is based upon a specimen of A. rhoadsii exhibiting the yellowing syndrome (see the closely phenetically related A. subsolitaria). ??more?? | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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name | Amanita rhoadsii var. flavotingens |
bottom links | [ Keys & Checklists ] |
name | Amanita rhoadsii var. flavotingens |
bottom links | [ Keys & Checklists ] |
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.