Amanita crassa - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella

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name	Amanita crassa
name status	nomen acceptum
author	Bas
english name	"Argentine Pinecone Lepidella"
intro	This description is based on the original description of Amanita crassa in Dr. Bas' thesis on section Lepidella (1969).
cap	The cap of A.crassa is about 150 mm wide, convex with a slightly depressed center, thick-fleshed, white, dry, strongly appendiculate, with a nonstriate, slightly inflected margin. The cap is covered with thick, adnate, radially fibrillose, polygonate patches to truncate pyramidal warts with felted tips, towards the margin these warts gradually pass into thick, shingle-like, fibrillose scales with felted, subtruncate tips.
gills	The gills are crowded, free, rather thick, moderately broad, and pale buff. The short gills narrow gradually toward the stem.
stem	The stem is about 100 × 50 mm, white, subfelted to glabrous, annulate, with two thick, concentric, subfloccose volval rings around the upper half of a pronounced bulb.
odor/taste	The odor was described as "pungent, like A. chlorinosma."
spores	The spores measure (6.5-) 7 - 9 × 4.5 - 6 µm and are amyloid and ellipsoid to elongate. Clamps are abundant at bases of basidia.
discussion	Amanita crassa is known only from Argentina, the type was found in dung, although that doesn't resolve the issue of whether the species forms mycorrhizae. On the other hand recent research shows that amanitas capable of living without symbiosis are all restricted to subsect. Vittadiniae. Bas placed this species in his stirps Ravenelii. For information about related taxa, see Amanita ravenelii (Berk. & M. A. Curtis) Sacc.—R. E. Tulloss
brief editors	RET

name

Amanita crassa

author

Bas. 1969. Persoonia 5: 402, figs. 118-120.

name status

nomen acceptum

english name

"Argentine Pinecone Lepidella"

MycoBank nos.

308548

GenBank nos.

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accession	locus	voucher	source



No data available in table

holotypes

BAFC

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 macroscopic description is largely based on the protolog, and all material in quotation marks is likewise taken from the protolog unless otherwise identified.

from protolog: Basidiome "large, thickset."

pileus

from protolog: 150^± mm wide, white, convex, with slightly depressed disc, dry; context white, thick; margin nonstriate, strongly appendiculate, slightly inflected; universal veil as polygonal patches to truncate pyramidal warts with felted tips, covering pileipellis except for a few narrow strip here and there, thick, up to 15 mm wide, adnate, radially fibrillose, towards margin passing into thick and imbricate, fibrillose scales with felted and subtruncate tips, up to 15 × 10 mm, with many scales and warts having one or two concentric ridges.

lamellae

from protolog: free, crowded, buff, thick, moderately broad, with entire edge; lamellulae attenuate.

stipe

from protolog: 100 × 50 mm, white, broadly ventricose and bulbous except for narrow region near the apex, with pointed, subradicating base, subfelted to glabrous; context white, firm; partial veil subapical, membranous, partly patent, white, vaguely striate above, subfelted to glabrous below, rather rigid in exsiccatum of holotype; universal veil as two thick, concentric rings on the upper half of the expanded part of the stipe, subfloccose.

odor/taste

from protolog: Odor pungent, like that of A. chlorinosma. Taste not recorded.

macrochemical
tests

none recorded.

pileipellis

from protolog: "in radial sections of warts and underlying tissue, impossible to locate," apparently found between warts, slightly yellowish in alkaline solution; filamentous hyphae 4 - 8 μm wide, with interwoven to subradial arrangement, often with refractive contents.

pileus context

not described.

lamella trama

from protolog: bilateral.

subhymenium

from protolog: ramose.

basidia

from protolog: 35 - 45 × 6 - 8 (-9) μm, 4-sterigmate; clamps abundant.

universal veil

from protolog: On pileus, excluding wart apex: pale yellowish in alkaline solution, with majority of elements having refractive contents; filamentous hyphae 5 - 12 (-15) μm wide, dominating, branching, anastomosing, subparallel, more or less anticlinally arranged; inflated cells scattered, predominantly elongate, up to 100 × 30 μm, in anticlinally oriented short chains; clamps abundant. On pileus, in wart apex: pale yellowish in alkaline solution, with majority of elements having refractive contents; with elements irregularly disposed; filamentous hyphae 4 - 15 μm wide, rather abundant; inflated cells very abundant, subcylindric to elongate-fusiform to elongate-ellipsoid to (more rarely) ellipsoid, up to 125 × 30 μm and 70 × 40 μm; clamps abundant. On bulb at stipe base: material in floccose rings similar to that in apices of wart on pileus.

stipe context

from protolog: longitudinally acrophysalidic; tissue examined ca. 5 mm below surface in exsiccatum; filamentous hyphae 5 - 10 μm wide, very abundant, often with refractive contents; acrophysalies scattered, rather small, up to 150 × 35 μm.

partial veil

from protolog: Upper surface: "consisting almost completely of interwoven, refractive hyphae 3 - 6 μm wide"; clamps large. Lower surface: "showing tendency to gelatinize"; inflated cells present, small, elongate.

lamella edge tissue

from protolog: "not found; edge of gills clean, as though cut off."

basidiospores

send to graphing tool

from protolog: [20/1/1] (6.5-) 7.0 - 9.0 × 4.5 - 6.0 μm, (Q = 1.30 - 1.80; Q = 1.50), colorless, hyaline, thin-walled, amyloid, ellipsoid to elongate; apiculus not described; contents refractive, guttulate; color in deposit not recorded.

ecology

from protolog: Argentina: Terrestrial.

material examined

from protolog: ARGENTINA: RÍO NEGRO—Chimpay, 3.i.1963 I. Gamundí s.n. [Singer S 395] (holotype, BAFC 31.535).

discussion

The holotype of this species is one of the collections which Singer originally assigned to A. ravenelii.

citations

—R. E. Tulloss

editors

RET

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name	Amanita crassa
name status	nomen acceptum
author	Bas
english name	"Argentine Pinecone Lepidella"

name	Amanita crassa
bottom links	[ Section Lepidella page. ] [ Amanita Studies home. ] [ Keys & Checklists ]

name	Amanita crassa
bottom links	[ Section Lepidella page. ] [ Amanita Studies home. ] [ Keys & Checklists ]

Spore data for collections
provisionally identified as: Amanita crassa Bas

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.

basidiospore definition

Spore Measurements by Collection

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