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Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999

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Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch in Bresinsky et al., Pl. Biol. 1 332 (1999)
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999

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Endemic
Present
New Zealand
Political Region

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Bresinsky & Jarosch
McNabb
(McNabb) Bresinsky & Jarosch
1999
332
ICN
NZ
species
Austropaxillus nothofagi

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nothofagi

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NEW ZEALAND: South Island: Westcoast, Taylorville, Mt. Sewell, under Nothofagus solandri var. cliffortioides, 1. IV. 1968, leg. HORAK (ZT 68/244).
The elliptic spores distinctly separate P. nothofagi from the two other native New Zealand species of Paxillus. Size and shape of the spores remind of those in P. involutus (Fr.) which, however, is readily distinguished by the presence of large cystidia.
COLLECTIONS EXAMINED: Under (1) N. fusca and N. menziesii, Nelson: Maruia, 23.iii.l966, J. A. McRobb; (2) N. solandri, Wellington: Tongariro National Park, Oturere Stream, 8.iv.l965, R. F. R. McN.; Horopito, I.V.1967 R. F. R. McN. (HOLOTYPE, PDD25904).
PILEUS: convex when young, infundibuliform or irregularly infundibuliform at maturity, 6-18 cm diam., dry, velutinate, finely felted, or subtomentose, often circumferentially creviced and exposing the bright yellow context at maturity, bronze, oak brown, cinnamon brown, or cocoa brown; cuticle a trichodermium when young, composed of erect, filamentous hyphae with conspicuous clamp connections and brown contents, terminal cells cylindrical to subclavate, thin-walled or slightly thick-walled, often externally roughened, 7-15 µm. diam., becoming disorganised at maturity; margins strongly involute when young, irregularly involute and often undulate and irregularly lobed at maturity. LAMELLAE: crowded, deeply decurrent, repeatedly dichotomously branched 4-(6) times, occasionally anastomosing, thick, 4-8 mm deep, maize yellow to amber yellow, often spotted and stained dark reddish brown at maturity, lamellulae absent. STIPE: 2-7 cm long, subequal or tapering basally, 1-2.5 cm diam. apically, 1-2 cm diam. basally, central or occasionally eccentric, solid, dry, finely velutinate, felted, or subtomentose by presence of filamentous, clamped hyphae with dark brown contents, concolorous with pileus; flesh brownish white to yellowish white, unchanging on exposure to air; veil absent. SPORES: spore print orange-brown (between Sudan Brown and Antique Brown); spores golden-melleous to bright rusty brown, elliptical, broadly elliptical, or ovate and flattened on one side, minutely apiculate, germ pore absent, 7.8-11 X 4.5-5.8-(6.8) µm., moderately thick-walled, smooth. HYMENIUM: basidia hyaline, subclavate, 38-58 X 6.5-9.5 µm., (2)-4-spored: cystidia absent but numerous sterile, paraphysis-like structures present. HYMENOPHORAL TRAMA: bilateral, mediostratum of loosely interwoven hyphae and occasionally oleiferous hyphae, lateral stratum of more closely interwoven hyphae; clamp connections present. CONTEXT OF PILEUS: yellowish white, un-changing on exposure to air. SMELL: not distinctive. TASTE: bitter. CHEMICAL CHARACTERS: KOH on pileus—dark reddish brown; on context—salmon; NH4OH on pileus—dark reddish brown with red flush; on context—pallid salmon.
HABITAT: Gregarious or caespitose under Nothofagus.

Pileus infundibuliformis vel irregulariter infundibuliformis, 6-18 cm diam., siccus, velutinatus vel subtomentosus, saepe rimosus, fuscus. Lamellae decurrentes, bipartito furcatae 4-(6) vicibus, ad 8 mm altae, sucinoflavae. Stipes 2-7 cm longus, subaequalis vel basaliter decrescens, 1-2.5 cm diam., siccus, subtiliter velutinatus vel subtomentosus, concolor cum pileo. Sporae late ellipticae, 7.8-11 X 4.5-5.8-(6.8) µm., leves.

Of the sections of Paxillus distinguished by Singer (1962), P. nothofagi fits most readily within sect. Veluticipites. The major point of disagreement between P. nothofagi and Singer's sectional diagnosis is in spore length, but this is possibly not of great importance, since the section is based on a single Australian species, P. veluticeps (Cooke & Mass.) Singer. The spores of P. veluticeps measure 13-18.3 X 4.5-6.3µm. and are considerably longer than those of P. nothofagi. As in sect. Defibulati, the two species admitted to sect. Veluticipites are both of south temperate distribution.

The strict association of P. nothofagi with Nothofagus suggests that it is a mycorrhizal species. It may be distinguished from P. squarrosus and P. aurantiacus by the larger fruitbodies, smaller elliptical spores, and the presence of clamp connections.

Typus: Wellington Province, Horopito, 1.v.l967, R. F. R. McN., PDD 25904.

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Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch (1999)
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch (1999)
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch (1999)
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch (1999)
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch (1999)
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch (1999)
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
Paxillus nothofagi McNabb 1969
Paxillus nothofagi McNabb (1969)
Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999

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Austropaxillus nothofagi (McNabb) Bresinsky & Jarosch 1999
[Not available]

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1cb1d3d4-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
9 April 2001
13 July 2001
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