name | Amanita violettae |
name status | nomen acceptum |
author | Tulloss |
english name | "White's Great Ringless Amanita" |
synonyms |
≡Amanita vaginata var. crassivolvata Peck |
images | |
cap |
Amanita violettae has a 70 - 100 mm wide cap that is pallid at first becoming more yellow-olivaceous with maturity; it margin is markedly striate, with striations occupying one quarter to one third of the cap radius. |
gills |
The white gills are free, close, and sometimes have a pale orangish tint at maturity; short gills are truncate. |
stem |
The 150 - 200 ´ 20± mm stem lacks an annulus, is often covered for much of its length by greyish to brownish fibrils, and bears a large thick white saccate volva at its base. |
odor/taste | double click in markup mode to edit. |
spores |
The spores measure (8.4-) 9.2 - 13.0 (-14.2) x (7.7-) 8.2 - 11.2 (-13.5) µm and are globose to subglobose to broadly ellipsoid (infrequently ellipsoid) and inamyloid. Clamps infrequent at bases of basidia. |
discussion |
It probably occurs in mixed hardwood - hemlock (Tsuga) forest and, hence, is probably associated with birch and hemlock. Amanita violettae is known to occur in the northeastern United States, possibly as far south as Connecticut. It probably also occurs in southeastern Canada. Amanita violettae is among the largest species of section Vaginatae that—comparable in many ways to A. pachycolea Stuntz in Thiers & Ammirati of the northwestern part of the contiguous 48 states of the U.S.A. and southwestern Canada and to the European species A. pachyvolvata (Bon) Krieglst. and A. magnivolvata Aalto. The species is named for Violetta Susan White. She made what became the type collection and communicated it with a watercolor painting to C. H. Peck who described it as Amanita vaginata var. crassivolvata in a paper otherwise written by White.—R. E. Tulloss |
brief editors | RET |
name | Amanita violettae | ||||||||
author | Tulloss. 1994. Mycotaxon 52: 380, figs. 46-47. | ||||||||
name status | nomen acceptum | ||||||||
english name | "White's Great Ringless Amanita" | ||||||||
synonyms |
≡Amanitopsis vaginata var. crassivolvata Peck in V. S. White. 1902. Bull. Torrey Bot. Club 29: 562.
≡Amanita vaginata var. crassivolvata (Peck) E.-J. Gilbert. 1941a. Notules Amanites (suppl.): 10. 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. | ||||||||
etymology | genetive of a Latinized name; hence, "Violetta's" or "of Violetta". Named in honor of Violetta S. White. | ||||||||
MycoBank nos. | 362538 | ||||||||
GenBank nos. |
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holotypes | NY | ||||||||
type studies | Amanitopsis vaginata var. crassivolvata—Tulloss. 1994. Mycotaxon 52: 380, figs. 46-47. | ||||||||
revisions | Tulloss, here | ||||||||
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 not directly from the protolog is based on original research by R. E. Tulloss. | ||||||||
pileus | protolog: 70 - 100 mm wide, creamy yellow, becoming yellowish with olive tint [in watercolor of holotype (NY)] with age, broadly convex to subplanar at maturity, somewhat umbonate, viscid when moist; context probably white; margin deeply striate (0.35±R); universal veil absent. | ||||||||
lamellae | protolog: free, close, white sometimes tinged with yellow, broad; lamellulae truncate. | ||||||||
stipe | protolog: 150 - 200 × 20 mm, cylindric or slowly narrowing upwards, with fibrils on surface darkening to gray; context at first loosely stuffed with slimy cottony fibers, becoming hollow; exannulate; universal veil as saccate volva, membranous to fleshy, thick, loose, copious, white, "woolly," spreading and assuming "the shape of a wine glass or goblet," dimensions of limb unrecorded, with limbus internus not described. | ||||||||
odor/taste | ?? | ||||||||
macrochemical tests |
none recorded. | ||||||||
basidiospores | protolog: [40/1/1] (8.5-) 10.0 - 11.8 (-12.2) × (7.8-) 9.0 - 11.0 (-11.2) µm, (L = 10.9 µm; W = 10.0 µm; Q = (1.0-) 1.03 - 1.17 (-1.23); Q = 1.09), hyaline, colorless, thin-walled, smooth, inamyloid, globose to subglobose to broadly ellipsoid, usually at least somewhat adaxially flattened; apiculus sublateral, cylindric, prominent; contents guttulate; color in deposit not reported. | ||||||||
ecology | Solitary to subgregarious. Maine: In damp soil by a brook (holotype). | ||||||||
material examined | from protolog: U.S.A.: MAINE—Hancock Co. - Bar Harbor, 20.vii.1901 V. S. White 39 (holotype of Amanitopsis vaginata var. crassivolvata, NY). | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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name | Amanita violettae |
bottom links | [ Keys & Checklists ] |
name | Amanita violettae |
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.