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

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name	Amanita rosea
name status	nomen acceptum
author	D. A. Reid
english name	"Victorian Rose Limbed-Lepidella"
intro	Description based on Reid (1980).
cap	The cap of Amanita rosea is up to 66 mm wide, becoming flattened, slightly depressed at the center, cream-colored, pale pink toward the smooth margin with scattered darker pink blotches.
gills	The gills are cream-colored.
stem	The stem is up to 85 × 13 mm, white, minutely dotted with yellow in the lower half, with pink nearer the top. There is no annulus on the stem, and the volva is present as a white, thin membranous limb at the top of the basal bulb.
spores	Reid reported that the spores of this species measure (9.5-) 10.2 - 14.0 (-15) × (5.5-) 6.0 - 6.6 (-7.75) µm and are ellipsoid to elongate to cylindric and amyloid. Clamps are absent at base of basidia. My measurements of spores from the type in Kew are (9.5-) 11.2 - 15.8 × 6.1 - 8.5 µm.
discussion	Originally described from state of Victoria, Australia. It's ecology is not recorded. A comparison between the description of A. mutabilis Beardslee (Bas 1969) and the present species shows many points of similarity. I am inclined to believe they should be placed together in Bas' stirps Preissii (see A. preissii (Fr.) Sacc.). —R. E. Tulloss
brief editors	RET

name

Amanita rosea

author

D. A. Reid. 1978. Victorian Naturalist 95: 49.

name status

nomen acceptum

english name

"Victorian Rose Limbed-Lepidella"

MycoBank nos.

308585

GenBank nos.

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accession	locus	voucher	source



No data available in table

holotypes

revisions

Tulloss (partial) herein

selected illustrations

Reid. 1980. Austral. J. Bot., Suppl. Ser. 8: 52, figs. 37(a-c), 89, 98.

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 is derived from the protolog, from (Reid, 1980), and from original research by R. E. Tulloss.

pileus

protolog: up to 66 mm wide, cream-colored with pale pink toward margin, with scattered darker pink blotches, especially toward periphery, becoming flattened, slightly depressed in disc; context white; margin smooth, sometimes appendiculate; universal veil as scant, indistinct patches near margin.

lamellae

protolog: cream.

stipe

protolog: up to 85 × 13 mm, white, minutely dotted with yellow in lower half and with pink near apex; bulb present but not described; context white, with "water-soaked strand"; exannulate; universal veil apparently yellow on exterior, enclosing bulb, with short free limb.

odor/taste

not recorded.

macrochemical
tests

none recorded.

pileipellis

not described in protolog.

pileus context

not described in protolog.

lamella trama

not described in protolog.

from type study of RET: bilateral, divergent.

subhymenium

not described in protolog.

from type study of RET: comprising inflated cells in evident branching structure—"inflated ramose."

basidia

protolog: up to 53 × 14.5 μm, 4-sterigmate; clamps absent.

from type study of RET: 50 - 78 × 11.9 - 15.8 μm, dominantly 4-, infrequently 2- or 3-sterigmate; no data recorded regarding clamps.

universal veil

protolog: On pileus: hyphae 2 - 7 μm wide, abundant, branched, thin-walled; clamps lacking; inflated cells clavate or ovoid (up to 80 × 33 μm) or globose, in short terminal chains; vascular hyphae not observed; clamps not observed.

stipe context

not described in protolog.

partial veil

absent.

lamella edge tissue

protolog: inflated cells in chains, with terminal cell clavate or ovoid, up to 16 μm wide. [Note: originally misdescribed by Reid as "cheilocystidia."]

basidiospores

send to graphing tool

protolog: [-/-/-] (9.5-) 10.2 - 14.0 (-15.0) × (5.5-) 6.0 - 6.6 (-7.8) μm, (est. Q = 1.70 - 2.15), amyloid, elongate to cylindric; apiculus not recorded; contents not recorded; color in deposit not recorded.

from type study of RET: [25/1/1] (9.5-) 10.9 - 15.8 × 6.1 - 8.5 μm, (L = 12.9 μm; W = 7.4 μm; Q = (1.45-) 1.49 - 2.08 (-2.21); Q = 1.74), thin-walled, smooth, amyloid, ellipsoid to elongate to (occasionally) cylindric; apiculus sublateral, proportionately small; contents guttulate; color in deposit not recorded.

ecology

not described in protolog.

material examined

protolog: AUSTRALIA: VICTORIA—Shire of South Gippsland - Wilson's Promontory Nat. Pk., Darby Saddle, 8.vii.1976 D. A., D. G. & P. M. Reid s.n. (holotype, K).

discussion

from type study of RET: On a brief visit to K, there was time for a partial, hurried examination of the type of this species. When viewed on November 4, 1988, the holotype included 4 stipe fragments, a volval sac, and 4 portions of pileus—altogether representing at least three basidiomes. One of the pilei was still distinctly pink on the margin. In a note with the exsiccata, the cap color is characterized as "grey white with salmon pink margin."

In the protolog, Reid discusses at length the possibility that the "mysterious" Metraria insignis (Cooke & Massee) Sacc. could have been rediscovered in the holotype collection of the present taxon.

citations

—R. E. Tulloss

editors

RET

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name	Amanita rosea
name status	nomen acceptum
author	D. A. Reid
english name	"Victorian Rose Limbed-Lepidella"

name	Amanita rosea
bottom links	[ Section Lepidella page. ] [ Amanita Studies home. ] [ Keys & Checklists ] [ Australia/New Zealand List ]

name	Amanita rosea
bottom links	[ Section Lepidella page. ] [ Amanita Studies home. ] [ Keys & Checklists ] [ Australia/New Zealand List ]

Spore data for collections
provisionally identified as: Amanita rosea D. A. Reid

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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