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Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995

Scientific name record
Names_Fungi record source
Is NZ relevant
This is the current name
This record has collections
This record has descriptions
This is indigenous

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Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie, Austral. Syst. Bot. 8 471 (1995)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995

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Endemic
Present
New Zealand
Political Region
Possibly also present in Australia (AF135179 ) and South Korea. There are morprhological differences in reported material.

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(G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie
G. Stev.
Segedin, P.K. Buchanan & J.P. Wilkie
1995
471
ICN
NZ holotype
species
Pleurotus purpureo-olivaceus

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purpureo-olivaceus

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On wood of dead Nothofagus solandri var. cliffortioides (Hook. f.) Poole, New Zealand, Tongariro National Park, Whakapapanui Stream, 28 May, 1980, leg. BPS, PDD 44961 (holotype) and Whakapapaiti Stream, 24 May, 1984, leg. BPS 1957. On Nothofagus trunk, New Zealand, Wellington, York Bay, 26 June, 1922, leg. E.H. Atkinson, PDD 655. On Nothofagus solandri var. cliffortioides, New Zealand, Tongariro National Park, Soda Springs Track, 13 June, 1971, leg. J.B. Taylor, PDD 29255. On rotten Nothofagus menziesii (Hook. f.) Oerst., New Zealand, Nelson, Lake Daniels Track, 16 May, 1969, leg. R.F.R. McNabb, PDD 31357. On tree lucerne stump, New Zealand, Levin, 1 August, 1952, leg. A.S. Wilkinson, G. Stevenson 874(K).
Basidiomes pleurotoid, sometimes imbricate; stipe present, strongly excentric to almost lateral. Pileus 10-70 mm wide by 30-56 mm long, broadly spathulate to flabelliform, broadly convex to flat, .rubbery in texture; surface matt, uniformly dark violet to deep brownish violet (15F7-14F5, K & W), retaining colour on drying, smooth and moist but not viscid; margin slightly inrolled when young, distinctly straight at maturity. Lamellae decurrent, 3-4 mm wide, pale silvery grey, thin, crowded, alternating with lamellulae of 3-4 lengths, some bifurcating towards stipe; edges very even. Stipe lateral, short, 5-15 mm x 5-10 mm wide, solid, pruinose, lilac-grey with yellowish tints (amber yellow, K & W 4B6) at the base. Flesh thin, grey. Spore print white. Smell and taste none. Spores 6.5 - 9 x 4.5-5 (7.6 x 4.7)) µm, hyaline, thin-walled, inamyloid, cylindrical-elliptic to slightly phaseoliform, collapsing easily. Basidia 37-40 x 6-8 µm, elongate-clavate, hyaline, sometimes with granular contents, 4-spored. Gill edge sterile; cheilocystidia crowded, varied in shape, cylindric-clavate, more strongly clavate to broadly lageniform, 25 x 3-7 µm, thin-walled, hyaline, all with conspicuous clamps at base; pleurocystidia absent. Pileipellis a thick parallelocutis of distinctive, incrusted to banded, clamped hyphae 4-7 µm diam., incrustations or bands deep purple-black in 3%v KOH, congo red or Melzer's solution. Context just below the pileipellis of sub-parallel, light brown (some incrusted), somewhat gelatinous hyphae 2-4 µm diam; rest of context hyaline, thin-walled interwoven hyphae 4-6 (-7) µm diam, with occasional oleiferous hyphae with cyanophilic contents. Lamellar trama similar to context but with scattered incrusted cells appearing dark blackish-brown in 3% KOH and Melzer's solution; subhymenium well-developed, pseudoparenchymatous. Stipe surface densely covered with distinctive coralloid clusters of short caulocystidia 11-35 x 7 µm, hyaline, with large clamp connections; some cystidia with thickened walls, others with hair-like extensions.
Basidiomata pleurotoidea, imbricata; stipes adest, fortiter excentricus. Pileus 1-7 cm latus, 3-5 cm longus, tenaciter carnosus, late spathulatus, flabelliformis, late convexus vel planus; superficies uniformiter atroviolacea vel brunneo-ardesiaca, coloue in sicco retento, glabra et humida sed non viscida; margine leviter in juvenute involuto, ad maturitatem recto. Lamellae decurrentes, 3-4 mm latae, marginibus laevibus et acutis, griseo-albae, tenues, confertae, 3-4 ordinibus lamellarum intermixtae, aliquando bifurcatae prope stipem. Stipes lateralis, curtus, 5-15 mm longus x 5-10 mm latus, solidus, pruinosus, basi lilacino-grisea. Caro grisea, tenuis. Pulvis sporarum albus. Sporae 6.5-9 (7.6) x 4.5-5 (4.7) µm, hyalinae, tenuitunicatae, cylindrico-ellipticae vel leviter fabiformes, collabentes. Basidia 37-40 x 6-8 µm, clavata, 4-sporigera. Cheilocystidia conferta, cylindrico-clavata, clavata vel lageniformia 25 x 3-7 µm, tenuitunicata, hyalina, fibulata. Pleurocystidia nulla. Pileipellis hyphis repentibus, incrustatis, fibulatis. Contextus summus hyphis leviter brunneis, leviter gelatinosis, 2-4 µm diam., contextus inferior hyphis tenuitunicatis; subhymenium pseudoparenchymatum; trama hyphis intertextis, allquando incrustatis. Caulocystidia coralliformia, hyaline, fibulata, aliquando crassitunicata. Inodora et insapora.
In ligno mortuo Nothofagus solandri var. cliffortioides (Hook. f.) Poole.
Holotypus PDD 44961.
The larger form quoted by Stevenson (1964) under P. ostreatus as having yellow gills is also a Pleurotus but not P. rattenburyi.
This very distinctive fungus was found in great quantity as the first invader of fallen trees following extensive killing of Nothofagus, the cause of which is not yet fully established, but may be associated with the frequent presence of Armillaria limonea (Stev.) Boisewinkel and A. novae-zelandiae (Stev.) Boisewinkel on Nothofagus in the area.
This fungus was first recorded for New Zealand by G. Stevenson (1964) as Pleurotus ostreatus (Jacq. ex Fr.) Kummer, collected at Levin on a tree lucerne stump by A.S. Wilkinson, 1 August, 1952 (Stevenson 874, K). The material at Kew has been examined and found to be identical with the material described in this paper. This fungus certainly has the appearance of some of the dark bluish-black variants of P. ostreatus but it differs from the published descriptions in a number of respects. P. ostreatus usually has a lilac spore print. It does not have the rubbery texture of P. rattenburyi when fresh, the spores are elongated to cylindrical, the lamellae are broader and well-spaced and creamy-white to ivory and the margin of the pileus is strongly inrolled.

Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995

new zealand: north L: taupo—Tongariro National Park, Whakapapanui Stream, on wood of dead Nothofagus solandri var. cliffortioides (Hook.f.) Poole, B.P. Segedin, 28. v. 1980, PDD 44961 (holotype of P. rattenburyi), Tongariro National Park, Whakapapaiti Stream, on N. solandri var. cliffortioides, B.P. Segedin 1957, 24. v. 1984; Tongariro National Park, Soda Springs track, on N. solandri var. cliffortioides, J.B. Taytor, 13. vi. 1971, PDD 29255. wellington—York Bay, on Nothofagus trunk, E.H. Atkinson. 26. vi. 1922, PDD 655; Levin, on tree lucerne stump, A.S. Wilkinson, G. Stevenson 874, K; Butterfly Creek, on fallen wood, J. McCan in Stevenson 323, 26. vi. 1948, K (holotype of P. purpureo-olivaceus). south i .: buller—Lake Daniels Tr„ on rotten N. menziesii, R.F.R. McNabb, 16. v. 1969, PDD 31357.

australia: tasmania—Mt Dromedary, on dead wood, Rodway Collection no. 146, HO.

Basidiomes pleurotoid, sometimes imbricate; stipe present, strongly excentric to almost lateral. Pileus 10-70 mm wide by 30-56 mm long, broadly spathulate to flabelliform, broadly convex to flat, rubbery in texture; surface matt, uniformly dark violet to deep brownish violet (15F7-14F5, K & W), retaining colour on drying, smooth and moist but not viscid; margin slightly inrolled when young, distinctly straight at maturity. Lamellae decurrent, 3-4 mm wide, pale silvery grey, thin, crowded, alternating with lamellulae of 3-4 lengths, some bifurcating towards stipe; edges very even. Stipe lateral, short, 5-15 mm x 5-10 mm wide, solid, pruinose, lilac-grey with yellowish tints (amber yellow, K & W 4B6) at the base. Flesh thin, grey. Spore print white. Smell and taste none.

Spores 6.5 - 9 x 4.5-5 (7.6 x 4.7)µm, hyaline, thin-walled, inamyloid, cylindrical-elliptic to slightly phaseoliform, collapsing easily. Basidia 37-40 x 6-8 µm, elongate-clavate, hyaline, sometimes with granular contents, 4-spored. Gill edge sterile; cheilocystidia crowded, varied in shape, cylindric-clavate, more strongly clavate to broadly lageniform, 25 x 3-7 µm, thin-walled, hyaline, all with conspicuous clamps at base; pleurocystidia absent. Pileipellis a thick parallelocutis of distinctive incrusted to banded, clamped hyphae 4-7 µm diam., incrustations or bands deep purple-black in 3% KOH, congo red or Melzer's solution. Context just-below the pileipellis of sub-parallel, light brown (some incrusted), somewhat gelatinous hyphae 2-4 µm diam; rest of context hyaline, thin-walled interwoven hyphae 4-6 (-7) µm diam, with occasional oleiferous hyphae with cyanophilic contents. Lamellar trama similar to context but with scattered incrusted cells appearing dark blackish-brown in 3% KOH and Melzer's solution; subhymenium well-developed, pseudoparenchymatous.

Stipe surface densely covered with distinctive coralloid clusters of short caulocystidia 11-35 x 7 µm, hyaline, with large clamp connections; some cystidia with thickened walls, others with hair like extensions.

Mainly on wood of Nothofagus species; one record on tree lucerne
A small form of this widespread species, closely similar to that illustrated by Lange (1936), was collected at Levin on a tree lucerne stump by A. S. Wilkinson, 1.8.1952. This collection, Stevenson 874, had a sour smell when fresh, but anatomical characters and spores agree with descriptions of this species. A larger form with yellow gills was collected from indigenous forest by M. Curran, at Muritai, 12.2.1958.
[mixed collections and description]
Pileus 3.5 cm diam., olivaceous to purplish olivaceous, orbicular, moist at first becoming velvety; flesh ochraceous. Gills decurrent, moderately crowded, long and short intercalating, dull ochraceous with purplish tint. Stipe 0.5 x 0.5-1 cm, lateral, velvety to fibrillose, ochraceous. Spores 6-8 x 3-4.5 µm, non-amyloid, thin-walled (Fig. 43) Cuticle of loosely woven hyphae up to 5 µm diam. Spores smooth
On fallen wood, Butterfly, Wellington, 26.6.1948, J. McCan in Stevenson (type).
Pileus 3.5 cm diam., olivaceus usque purpureo-olivaceus, orbicularis, primo humidus deinde velutinus; caro ochracea. Lamellae decurrentes, modice confertae, longiores cum brevioribus alternantes, sordide ochraceae, purpureo-tinctae. Stipes 0.5 x 0.5-1 cm, lateralis, velutinus usque fibrillosus, ochraceus. Sporae 6-8 x 3-4.5 µm, haud amyloideae, parietibus tenuibus.
Typus: J. McCan in. Stevenson 323.

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Lentinellus crawfordiae sensu Miller, O.K.; Stewart, L. (1971)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus crawfordiae sensu Miller, O.K.; Stewart, L. (1971)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus ostreatus sensu G. Stev. (1964)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus purpureoolivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie (1995)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus purpureoolivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie (1995)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus purpureoolivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie (1995)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus purpureoolivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie (1995)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus purpureoolivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie (1995)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Pleurotus purpureoolivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie (1995)
Pleurotus rattenburyi Segedin (1984)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Resupinatus purpureoolivaceus G. Stev. 1964
Resupinatus purpureoolivaceus G. Stev. (1964)
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995

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Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
Australia
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Buller
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Fiordland
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Mackenzie
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Mid Canterbury
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Nelson
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
North Canterbury
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Otago Lakes
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Taupo
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Wairarapa
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Wellington
Pleurotus purpureo-olivaceus (G. Stev.) Segedin, P.K. Buchanan & J.P. Wilkie 1995
New Zealand
Westland
New Zealand
Mid Canterbury

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1cb19c17-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
19 August 1997
17 August 2018
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