name | Amanita obconicobasis |
name status | nomen provisorum |
author | Tulloss & S. D. Russell |
english name | "Stem-in-a-Cone Ringless Amanita" |
images | |
intro | As usual, data will appear on the technical tab of this page first. |
discussion |
Two curious characters of this species are (1) that
there is an upsidedown cone of tissue under the
stem's base and inside the volval sack (2) that the
internal limb of the volval sac can be carried up
with volval by the cap as the mushroom expands. In the latter case, at least for awhile, the internal limb may project under the cap and cover the inner ends of the gills. (See image no. 2, above.) The reader may wish to compare this species with the genetically distinct A. sp-C25.—R. E. Tulloss |
brief editors | RET |
name | Amanita obconicobasis | ||||||||||||||||||||
author | Tulloss and S. D. Russell | ||||||||||||||||||||
name status | nomen provisorum | ||||||||||||||||||||
english name | "Stem-in-a-Cone Ringless Amanita" | ||||||||||||||||||||
GenBank nos. |
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macrochemical tests |
none recorded. | ||||||||||||||||||||
partial veil | absent. | ||||||||||||||||||||
lamella edge tissue | sterile. | ||||||||||||||||||||
ecology | Solitary. In grass near Quercus. | ||||||||||||||||||||
material examined | U.S.A.: CALIFORNIA—Solano Co. - Stebbins Cold Canyon Reserve [38.508° N/ 122.1065° W, 410 m], 28.iii.2011 Hunter Sezen s.n. [mushroomobserver #64887] (RET 666-3, nrITS & nrLSU seq'd.). WASHINGTON—Skamania Co. - Gifford Pinchot Nat. For., Dead Horse Meadows [ 47.0267° N / 121.6550° W, 1088 m], 9.ix.2014 Dr. Michael Beug 01MWB091014 (RET 665-2, nrITS & LSU seq'd.), (RET 665-7, nrITS-LSU seq'd.). | ||||||||||||||||||||
discussion |
There are at least two striking things in the images of
this species: The limbus internus of the volva appears
to be carried up by the expanding cap; and, at the stage
of development that is depicted, the limbus internus is
still wrapped around the cap edge and projects over the
lamellae. There is an obconic lump of tissue below the
stipe that is not composed of stipe context. A distinct species with a similar stipe base is included in these pages under the name A. sp-C25. The preface (5' motif) of the nrLSU gene is of the form dominant in section Vaginatae—"TTTGACCTCAAATCA." Previously, this organism was called "A. sp-C27" on this site. | ||||||||||||||||||||
citations | —R. E. Tulloss | ||||||||||||||||||||
editors | RET | ||||||||||||||||||||
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name | Amanita obconicobasis |
name status | nomen provisorum |
author | Tulloss & S. D. Russell |
english name | "Stem-in-a-Cone Ringless Amanita" |
images | |
photo | Hunter Sezen - (1-3) Stebbins Cold Canyon Reserve, Solano County, California, USA. (RET 666-3) [Note: Original, unedited images can be found here.—ed.] |