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Amanita muscaria (L.) Lam. 1783

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Exotic
Present
New Zealand
Political Region
1st Record 1920 (PDD 866)

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(L.) Lam.
L.
Lam.
1783
111
Fr.
ICN
species
Amanita muscaria

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muscaria

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Amanita muscaria (L.) Lam. 1783

Type: Mycorrhizal Fungi; Description: Basidiomata pileate. Pileus scarlet, paling to orange at the margin, up to 130 mm in diameter, sprinkled with remnants of the volva forming white warty patches which are often arranged concentrically, convex at first, becoming almost plane later, viscid when young, dry later; flesh firm, white. Gills crowded, free, white. Stipe tapering slightly towards the pileus from a bulbous base, white and striate above a membranaceous white to yellowish annulus, white to dirty white below, hollow, up to 170 mm long. Basidiospores subglobose to broadly ellipsoid, 0-septate, 9–11 × 7–8 μm, hyaline, non-amyloid; spore print white.
Distribution: Northland, Auckland, Coromandel, Waikato, Bay of Plenty, Taranaki, Taupo, Wanganui, Wellington, Gisborne, Hawkes Bay, Wairarapa, Nelson, Fiordland, Marlborough, North Canterbury, Mid Canterbury, Dunedin, Southland, Chatham Islands.; 1st Record: Birch (1937).
Significance: This is the classic toadstool familiar to everyone. It is one of the most common and striking agarics associated with introduced tree species in New Zealand. Unlike most introduced mycorrhizal fungi, it has been recorded in indigenous forests in association with Nothofagus and Leptospermum (Stevenson 1962, Horak 1971). Recent reports (Johnston et al. 1998; Orlovich & Cairney 2004) indicate A. muscaria may be locally common in Nothofagus forests in several areas in the South Island. The fungus was isolated from, and experimentally shown to be, a mycorrhizal partner of Pinus radiata (Chu-Chou 1979) and Pseudotsuga menziesii (Chu-Chou & Grace 1981c). It has not been recorded in nurseries and is found only in older (>6-year-old) plantations (Chu-Chou & Grace 1988).; Host(s): Arbutus sp., Betula pendula, Castanea sativa, Eucalyptus ficifolia, E. pauciflora subsp. pauciflora, Fagus sylvatica, Larix decidua, Nothofagus fusca, N. menziesii, N. solandri var. solandri, N. solandri var. cliffortioides, Pinus nigra subsp. laricio, P. radiata, Pseudotsuga menziesii, Quercus robur.

Amanita muscaria (L.) Lam. 1783

This conspicuous species occurs in New Zealand under various exotic trees where it forms mycorrhizas, and there is no question that this agaric is an introduced species. However, like Stevenson (25), we found many fruiting bodies of this species in native bush with Nothofagus and Leptospermum. It would be interesting to know if this introduced mycorrhizal fungus can change its host and form partnerships with these two indigenous genera which normally form ectotrophic mycorrhizas with numerous indigenous Agaricales. The wide host range of A. muscaria sugests that this possibility is not unlikely.

Amanita muscaria (L.) Lam. 1783

Basidiocarps medium to large, solitary to gregarious. Pileus to 130 mm, convex to plano- convex, then plano-depressed, margin sulcate (c. 0.07 R), entire, disc scarlet, paling to orange at the margin, then developing a metallic bronze appearance, viscid when young or wet, drying with age, volva remnants forming squarish to pointed, white warts on disc, becoming narrow, flocculent patches towards margin, often arranged concentrically. Lamellae crowded, free, 6- 10 mm wide, white; lamellulae subtruncate. Stipe to 170 mm high, 20-23 mm diameter, hollow, from bulbous base, 32-33 mm diameter, surface above annulus floccose to pulverulent, striate, white, below annulus sparsely floccose, white to sordid white, basal bulb crowned with concentric bands or squarish warts. Annulus membranous, pendulous then adhering to stipe, white to primrose. Context of pileus white, with orange to pale luteous directly under the pileipellis, stipe white.

Spore print white. Basidiospores (20/2), 9-10.5 x 7-5-8 µm, Qm 1. 38, Q 1. 12-1.40, subglobose to broadly ellipsoid, hyaline, inamyloid. Basidia 50-63. 5 x 10-13 µm, 4-spored, not clamped. Lamella margin cells indistinct. Pileipellis composed of c. 460 µm wide, gelatinised suprapellis, and dense, non-gelatinised subpellis. Volva remnants from pileus composed of globose, elliptic or clavate, hyaline cells, to 40 x 20 µm, with abundant hyphae to 8 µm wide; tending to vertically arranged on the disc, less so towards the pileus edge.

Amanita muscaria (L.) Lam. 1783

This species often reaches large size in New Zealand, up to 25 cm. diam. and 30 cm. tall. Spores are 8-10 x 11-12um which agrees with the dimen- sions given by Bresadola and is a little larger than 9.5-10.5 x 7-8 which is given by Lange (1935). Colour and other features agree exactly with those of European specimens.
It is very abundant throughout the north island of New Zealand and the northern part of the south island where it is associated with the commonly planted exotic tree, Pinus radiata. However, although P. radiata plantations are numerous further south, A. muscaria is not found with them, its place apparently being taken by Boletus luteus. Besides being associated with Pinus this species has been collected also under Betula, under Spanish Chestnut, in a shrub garden and also once (Stevenson at Lake Rotoiti, Nelson) in Cyathodes scrub near Nothofagus; all these occurrences were far distant from any pine trees.

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Agaricus muscarius L. (1753)
Amanita muscaria (L.) Lam. 1783
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Amanita muscaria (L.) Lam. 1783
[Not available]

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1cb17d41-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2000
27 October 2022
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