| name | Amanita silvatica |
| name status | nomen acceptum |
| author | Guzmán |
| english name | "Guzmán's Tropical Amanita" |
| intro | This description is based on the original description (1982). |
| cap | The cap of A. silvatica is 20 - 35 mm wide, convex to plane, slightly slippery when moist, yellowish orange to pale yellow toward the margin, glabrous, with sulcate-striate margin. The cap is scattered with irregularly shaped, yellowish, rather thick, floccose-membranous, flat patches from the volva. The flesh is white. |
| gills | The gills are free and white to cream. Short gills were not described. |
| stem | The stem is 35 - 45 × 3 - 7 mm, cylindric or narrowing upward, white to whitish cream. The basal bulb is globose or subglobose, white to pale cream. The stem is somewhat floccose in the lower part. A ring is absent. The volva is a free limb, white, sometimes with vertical splitting, with an yellowish-orange edge of the limb. The flesh is white. |
| odor/taste | Neither the odor nor the taste has been described for this species. |
| spores | The spores measure (4.9-) 6.7 - 9.0 (-9.7) × (4.9-) 6.0 - 7.5 (-8.2) µm and are globose to subglobose and inamyloid. Clamps are absent at base of basidia. |
| discussion |
The mushroom was found growing on the soil of a tropical rainforest, subgregariously. Amanita silvatica was originally described from the state of Quintana Roo (Mexico) near the Caribbean Sea coast. In the original description, comparison to A. elata (Massee) Corner & Bas is suggested, however the evidence given does not suggest a close relationship.—R. E. Tulloss and L. Possiel |
| brief editors | RET |
| name | Amanita silvatica | ||||||||||||||||||||
| author | Guzmán. 1982. Mycotaxon 16: 254, figs. 15-19. | ||||||||||||||||||||
| name status | nomen acceptum | ||||||||||||||||||||
| english name | "Guzmán's Tropical Amanita" | ||||||||||||||||||||
| MycoBank nos. | 109593 | ||||||||||||||||||||
| GenBank nos. |
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| holotypes | ENCB | ||||||||||||||||||||
| selected illustrations | Guzmán. 1983. Biótica 8: 96, fig. 31. | ||||||||||||||||||||
| 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 species. | ||||||||||||||||||||
| pileus | protolog: 20 - 35 mm wide, yellowish orange, pale yellow toward margin, convex to planar, smooth; context white; margin striate; universal veil absent or as scattered irregular flat patches, yellowish, floccose-membranous, rather thick. | ||||||||||||||||||||
| lamellae | from protolog: free, density not described, white to cream; lamellulae not described. | ||||||||||||||||||||
| stipe | protolog: 35 - 45 × 3 - 7 μm, white to whitish cream, cylindric or narrowing upward, "somewhat floccose below"; context white; bulb globose to subglobose; exannulate; universal veil as limbate volva, with margin of free limb fibriate or lacerate and white to orange to yellowish. | ||||||||||||||||||||
| odor/taste | protolog: Odor not distinctive. Taste not described. | ||||||||||||||||||||
| macrochemical tests |
none described. | ||||||||||||||||||||
| pileipellis | not described. | ||||||||||||||||||||
| pileus context | not described. | ||||||||||||||||||||
| lamella trama | not described. | ||||||||||||||||||||
| subhymenium | not described. | ||||||||||||||||||||
| basidia | protolog: 19.5 - 22 × 9 - 9.7 μm, 4-sterigmate, "ventricose" (broadly clavate per figure); clamps not observed. | ||||||||||||||||||||
| universal veil | protolog: On pileus: filamentous hyphae 3 - 12 μm wide; inflated cells globose to subellipsoid to subfusiform, (9-) 26 - 44 (-45) × (6-) 16.5 - 26 (-30) μm, hyaline, thin-walled, terminal singly (per figure). On stipe base: filamentous hyphae 1.5 - 13.5 μm wide; inflated cells globose to fusiform to subellipsoid, 18.7 - 50 × 7.5 - 30 μm, hyaline, thin-walled, terminal. | ||||||||||||||||||||
| stipe context | not described. | ||||||||||||||||||||
| partial veil | absent. | ||||||||||||||||||||
| lamella edge tissue | not described. | ||||||||||||||||||||
| basidiospores | protolog: [-/-/-] (4.9-) 6.7 - 9 (-9.7) × (4.9-) 6 - 7.5 (-8.2) μm, (est. Q = 1.11 - 1.20), hyaline, inamyloid, subglobose to broadly ellipsoid, rarely globose; apiculus short; contents not described; color in deposit not recorded. [Note: A range for Q has been estimated conservatively in order to make a sporograph possible.—ed.] | ||||||||||||||||||||
| ecology | protolog: Subgregarious. On soil in tropical rain forest. | ||||||||||||||||||||
| material examined |
protolog: MÉXICO: QUINTANA ROO—ca. rd. from Puerto Morelos to Tulum, closer to crossing to Vallarta | ||||||||||||||||||||
| citations | —R. E. Tulloss | ||||||||||||||||||||
| editors | RET | ||||||||||||||||||||
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| name | Amanita silvatica |
| bottom links | [ Keys & Checklists ] |
| name | Amanita silvatica |
| 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.
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