1. Amanita violettae, Desert Island, Maine, U.S.A.
2. Violetta Delafield, nee White, ca. 1910, for whom the present species is named.
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.
The white gills are free, close, and sometimes have a pale orangish tint at maturity;
short gills are truncate.
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.
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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.
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.
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
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.
genetive of a Latinized name; hence, "Violetta's" or "of Violetta". Named in honor of Violetta S. White.
Due to delays in data processing at GenBank, some accession numbers may lead to dead pages.
These pages will eventually be made live, so try again later.
Amanitopsis vaginata var. crassivolvata—Tulloss. 1994. Mycotaxon 52: 380, figs. 46-47.
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.
from 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.
from protolog: free, close, white sometimes tinged with yellow, broad; lamellulae truncate.
from 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.
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.