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Russula macrocystidiata McNabb, New Zealand J. Bot. 11 709 (1973)
Russula macrocystidiata McNabb 1973

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Endemic
Present
New Zealand
Political Region

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McNabb
McNabb
1973
709
ICN
Russula macrocystidiata McNabb 1973
NZ holotype
species
Russula macrocystidiata

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macrocystidiata

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Russula macrocystidiata McNabb 1973

Under (1) Leptospermum ericoides, Auckland: Henderson Valley, Sharps Bush, 10.iii.l967, 16.V.1967, 21.vi.l967 (2 coils), R. F. R. McN. (PDD 26647, 26537. 26569, 26570). (2) Nothofagus fusca: Nelson, Oparara, Fenian Track, 4.i.l969, R. F. R. McN.; L. Daniels track. 15.V.1969, R. F. R. McN.; Karamea, Umere, 2.i.l968, R. F, R. McN. (3) N. menziesii, Auckland: Rotorua, Mangorewa Gorge, 25.iv.l967, R. F. R. McN (PDD 26593); Nelson, Karamea, Umere, 31.i.l968, R. F. R. McN. (holotype, pdd 30658); 29.xii.l969, R. F. R. McN. (2 coils); 13.xii.l969, A. Y. McN.; 411970 R. F. R. McN.; L. Daniels track, 25.iv.l969, R. F. R. McN.; Oparara R., 2.i.l970, R. F. R. McN. Otago: Secretary Is., 13.ii.l968, R. F. R. McN. (PDD 26934). (4) N. menziesii/N. cliffortioides: Canterbury, near Cass, 31.m.l968, M. J. Noonan. (5) N. solandri, Auckland, National Park, Whakapapaiti Stream, 2.v.1967, R. F. R. McN. (PDD 26606). (6) N. truncata: Nelson: Granite Creek, 6.1.1970, B. J. Denton.
pileus: 2.5-7 cm diam., convex when young, centrally depressed at maturity, slightly viscid under wet conditions, otherwise dry, finely subpruinose under lens, velar remnants absent, greyish magenta, greyish violet, or dull violet, often with yellow or greenish yellow areas; margins entire, non-pectinate. Cuticle composed of erect, thin-walled or slightly thick-walled, smooth, septate, hair-like hyphae to 125 µm long, 2.5-4.5 µm diam., without staining contents in KOH, terminal cells unspecialised, tapering apically, originating from inflated, short-celled hyphae arising from a layer of sphaerocysts, becoming disorganised and partially gelatinised with age; pilocystidia absent. lamellae: adnexed to adnate, crowded, thin, simple or forked near stipe, to 7 mm deep, white to creamy white, not discoloured at maturity but edges occasionally tinted with colours of stipe, lamellulae rare or absent. stipe: 2-5.5 cm long, ± equal or slightly expanded basally, 0.6-1.5 cm diam., dry, solid, finely furfuraceous under lens, paler than pileus, greyish magenta, beetroot, or rose, often with white flesh showing through, flesh white, unchanging on exposure to air. Cuticle composed of interwoven, repent, thin-walled, septate hyphae 2.5-4.5 µm diam., terminal cells projecting and aggregated into clumps; caulocystidia absent. spores: spore print not obtained; spores broadly elliptical to ovate, obliquely apiculate, apiculus to -1.5 µm long, 9-11 X 7.5-9.5 µm, ornamentation dense, of amyloid or partially inamyloid, truncated spines to 1.4-(1.8) µm high, in small confluent groups, joined basally by moderately fine amyloid ridges and forming a partial reticulum, or occasionally isolated; plage conspicuous. hymenium: basidia hyaline, clavate, 30-45 X 10.5-13 µm, 4-spored, sterigmata to 7 µm long; pleurocystidia scattered, numerous, fusiform to broadly fusiform, hyaline, thick-walled, walls to 2.5 µm thick at mid point, thinner at base and apex, contents refractive in KOH, projecting to 70 µm beyond basidia, apices, acuminate, strangulate, or capitulate, 60-135 X 9-21 µm, cheilocystidia numerous, filamentous, septate, simple or occasionally sparingly branched apically, to 5 µm diam., intermixed with a few short pleurocystidia. hymenophoral trama: heteromerous, intermixed. context of pileus: white, unchanging; structure heteromerous, clamp connections absent. taste: Lamellae and gills mild. chemical characters: formalin n.r.; phenol—slowly faintly deep purplish red; FeSO4—faint salmon pink; guaiacol—n.r.; KOH on pileus —bright brownish orange; on context—n.r.; NH4OH on pileus and context—n.r.
Solitary or gregarious under Leptospermum and Nothofagus spp.
Pileus centraliter depressus 2.5-7 cm diam., griseo-violaceus, subtiliter pruinosus; veli vestigia deficiunt; margines integri, non pectinati. Lamellae adnexae ad adnatas ad 7 mm altae cremeo-albae; lamellulae rarae. Stipes 2-5.5 cm longus, basim parum dilatatus, 0.6-1.5 cm diam., siccus, solidus, concolor cum pileo. Sporae late ellipticae ad ovatas 9-11 x 7.5-9.5 µm, amyloides vel partim inamyloides dense ornatae.
Russula macrocystidiata belongs in section Rigidae and, like R. tawai, is possibly best assigned to subsection Amoeninae (Singer 1962). It resembles R. tawai in many respects, but may be distinguished by the white to creamy white lamellae, white context, thinner walled pleurocystidia projecting to 70 µm beyond the basidia, and the slightly different spore ornamentation.
holotype, pdd 30658

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Russula macrocystidiata McNabb 1973
Russula macrocystidiata McNabb 1973
Russula macrocystidiata McNabb 1973
Russula macrocystidiata McNabb (1973)
Russula macrocystidiata McNabb 1973
Russula macrocystidiata McNabb (1973)
Russula macrocystidiata McNabb 1973
Russula macrocystidiata McNabb (1973)
Russula macrocystidiata McNabb 1973
Russula macrocystidiata McNabb (1973)
Russula macrocystidiata McNabb 1973
Russula macrocystidiata McNabb (1973)
Russula macrocystidiata McNabb 1973
Russula macrocystidiata McNabb (1973)
Russula macrocystidiata McNabb 1973
Russula macrocystidiata McNabb (1973)
Russula macrocystidiata McNabb 1973

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Russula macrocystidiata McNabb 1973
New Zealand
Auckland
Russula macrocystidiata McNabb 1973
New Zealand
Bay of Plenty
Russula macrocystidiata McNabb 1973
New Zealand
Buller
Russula macrocystidiata McNabb 1973
New Zealand
Coromandel
Russula macrocystidiata McNabb 1973
New Zealand
Fiordland
Russula macrocystidiata McNabb 1973
New Zealand
Gisborne
Russula macrocystidiata McNabb 1973
New Zealand
Mackenzie
Russula macrocystidiata McNabb 1973
New Zealand
Mid Canterbury
Russula macrocystidiata McNabb 1973
New Zealand
Nelson
Russula macrocystidiata McNabb 1973
New Zealand
North Canterbury
Russula macrocystidiata McNabb 1973
New Zealand
Northland
Russula macrocystidiata McNabb 1973
New Zealand
Otago Lakes
Russula macrocystidiata McNabb 1973
New Zealand
Rangitikei
Russula macrocystidiata McNabb 1973
New Zealand
Southland
Russula macrocystidiata McNabb 1973
New Zealand
Taupo
Russula macrocystidiata McNabb 1973
New Zealand
Wairarapa
Russula macrocystidiata McNabb 1973
New Zealand
Wellington
Russula macrocystidiata McNabb 1973
New Zealand
Westland

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1cb19f59-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2000
18 October 2022
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