Public Description of Amanita chrysoblema G.F. Atk.

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Name: Amanita chrysoblema G.F. Atk.
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Description status: Unreviewed

Taxonomic Classification:

Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales

General Description:

Amanita chrysoblema
Etymology: From Greek χρυσός, khrusos, “gold”, + βληµα, blema, “coverlet”
=‘Golden Veil’; referring to the sprinkling of yellow floccules on the upper side of the annulus.

Recent molecular work by Tulloss and Geml has not shown a great enough difference in the DNA of A. chrysoblema (eastern white form), A. muscaria subsp. flavivolvata (western, red form), and A. muscaria var. guessowii (eastern, orange-yellow form), to consider them distinct biological entities at species level. In other words, they are all synonyms; with A. chrysoblema taking precedence because it is the earliest valid name of the three ‘forms’ at species level we have available to use. A. amerimuscaria Tulloss, and A. muscaria var. alba Peck, are also obsolete synonyms. Érlon

Original description:

653. Amanita chrysoblema Atk. sp. nov. (probably Deadly
Poisonous) [sic]
Illustration: PIate CXX of this Report.

PILEUS: 8-10 cm. broad, convex-expanded, pure white, densely covered with white floccose patches or scales, viscid, margin finely striate.

GILLS: free, somewhat remote, narrow, close, white, plane, heterophyllous.

STEM: stout, 10-14 cm. long, 1 cm. thick above, tapering from the clavate-bulbous base, 2 cm. thick, stuffed by a pith then hollow, very torn-scaly below annulus, floccose above, white, bulb and lower part of stem somewhat adorned by narrow thick rings, the remains of the volva.

ANNULUS: superior, rather ample, thin, pendant, somewhat distant, white except a sprinkling of yellow floccules on upper side.

VOLVA: floccose, rather fragile, white, in broken rings on bulb and lower stem.

SPORES: broadly-elliptical, 9-10×6-7 micr., smooth, white, granular within.

Solitary. On the ground, in the edge of a sphagnum swamp. September-October. Ann Arbor. Rare.

Differs from A. cothurnata in its bulb and annulus characters, and in its elliptical spores. The scales of the stem are due to its torn surface and point upward. The floccose structure of the universal veil and its manner of breaking separates it from A. verna, A. phalloides and A. virosa. The yellow floccules on the annulus are a character peculiar to this species. A. crenulata differs from A. chrysoblema in its very evanescent volva, in its gills which reach the stem and have a strongly floccose edge, the floccules of which are sometimes yellow, and in its nucleate spores. (Kauffman, C. H. (1918). The Agaricaceae of Michigan (No. 5). WH Crawford Company, state printers.)

Description author: Erlon (Request Authorship Credit)

Created: 2013-11-23 01:45:10 CST (-0500) by Erlon (Herbert Baker)
Last modified: 2017-07-13 00:46:09 CDT (-0400) by Erlon (Herbert Baker)
Viewed: 117 times, last viewed: 2017-09-07 14:43:18 CDT (-0400)