Russula roseostipitata McNabb 1973

Caption:

Details

Name scientific

Russula roseostipitata McNabb, New Zealand J. Bot. 11 708 (1973)

Preferred name

Russula roseostipitata McNabb 1973

Taxonomy reference

Segedin, B.P.; Pennycook, S.R. 2001: A nomenclatural checklist of agarics, boletes, and related secotioid and gasteromycetous fungi recorded from New Zealand. New Zealand Journal of Botany 39(2): 285-348.

Biostatus

Origin

Occurrence

Georegion

Schema

Biostatus source

Comment

Endemic

Present

New Zealand

Political Region

Anon

Nomenclature

Authors

McNabb

Original authors

McNabb

Publication place

McNabb, R.F.R. 1973: Russulaceae of New Zealand. 2. Russula Pers. ex S.F. Gray. New Zealand Journal of Botany 11(4): 673-730.

Year published

1973

Publication page

708

Nomenclatural code

ICN

Basionym

Russula roseostipitata McNabb 1973

Type locality

NZ holotype

Taxonomic rank

species

Canonical form

Russula roseostipitata

Classification

Kingdom

Fungi

Phylum

Basidiomycota

Class

Agaricomycetes

Order

Russulales

Family

Russulaceae

Genus

Russula

Species

roseostipitata

Synonyms

Associations

View full associations record

Association type

Associated organism

Association source

has host

Nothofagus fusca (Hook.f.) Oerst.

McKenzie, E.H.C.; Buchanan, P.K.; Johnston, P.R. (2000)

has mycorrhizal host

Nothofagus solandri var. cliffortioides (Hook.f.) Poole

Dickie, I.A.; Bolstridge, N.; Cooper, J.A.; Peltzer, D.A. (2010)

has mycorrhizal host

Nothofagus

Dickie, I.A.; Richardson, S.J.; Wiser, S.K. (2009)

has host

Nothofagus solandri (Hook.f.) Oerst. var. solandri

McKenzie, E.H.C.; Buchanan, P.K.; Johnston, P.R. (2000)

has host

Nothofagaceae

PDD (2 records from New Zealand.)

has host

Nothofagus

PDD (5 records from New Zealand.)

has host

Nothofagus fusca (Hook.f.) Oerst.

PDD (5 records from New Zealand.)

has host

Nothofagus menziesii (Hook.f.) Oerst.

PDD (5 records from New Zealand.)

has host

Nothofagus solandri (Hook.f.) Oerst.

PDD (6 records from New Zealand.)

has host

Nothofagus solandri (Hook.f.) Oerst. var. solandri

PDD (1 records from New Zealand.)

has host

Nothofagus solandri var. cliffortioides (Hook.f.) Poole

PDD (1 records from New Zealand.)

Descriptions

McNabb, R.F.R. 1973: Russulaceae of New Zealand. 2. Russula Pers. ex S.F. Gray. New Zealand Journal of Botany 11(4): 673-730.

Russula atrovirens McNabb 1973

Collections Examined

Under (1) N. fusca and N. menziesii, Nelson: Maruia, 25.iv.l969, R. F. R. McN.; Lake Daniels Track, 15.V.1969, R. F, R. McN. (2) N, menziesii. Nelson: Lake Daniels Track, 15.V.1969, R. F. R. McN. (3) N. solandri, Canterbury: Craigieburn, 5.ii.l969, E. Horak, (holotype, pdd 30655).

Description

pileus: 3.5-6.5 cm diam., hemispherical or convex when young, centrally depressed at maturity, slightly to moderately viscid, glabrous, innately subpruinose under lens, velar remnants absent, often multicoloured, dull greyish magenta with greenish yellow or dark brown patches, sordid greyish green, or sooty grey with sordid greenish tints, often with dull yellowish patches particularly toward centre, greyish green colours predominating in dried specimens; margins entire, moderately thin, non-pectinate. Cuticle 75-100 µm, thick, composed of erect, hyaline, thin-walled, septate, hair-like hyphae 2-5 µm, diam., without coloured contents in KOH, terminal cells unspecialised, often with acuminate or irregularly acuminate apices, occasionally projecting to 50 µm beyond general level of cuticle, becoming disorganised and partially gelatinised with age; pilocystidia absent. lamellae: adnate, crowded, moderately thick, simple or occasionally forked near stipe, to 5 mm deep, white to pallid creamy white, not discoloured at maturity, lamellulae rare Or absent. stipe: 2-4 cm long, ± equal, 1-1.5 cm diam., dry, solid, finely furfuraceous under lens, pallid greyish magenta, pallid rose, or pallid sooty grey, flesh white, unchanging on exposure to air. Cuticle composed of interwoven hyphae 2.5-5 µm diam., terminal cells projecting and often aggregated into clumps. spores: spore print not obtained; spores broadly elliptical, obliquely apiculate, apiculus to 1.5-(2) µm long, 7.5-10.5 X 7-9 µm, ornamentation of moderately dense amyloid verrucae to 0.7-(l) µm high, in confluent groups and forming nodulate bands, joined by fine amyloid ridges and forming an incomplete reticulum, or occasionally isolated; plage distinct. hymenium: basidia hyaline, clavate, 39-52 X 10-13.5 µn, 4-spored, sterigmata to 8 µm long: pleurocystidia scattered, numerous, broadly fusiform or subclavate, hyaline, thin-walled, contents refractive in KOH, projecting to 15 µm beyond basidia, apices bluntly acuminate, acuminate or apiculate, 52-78 X 8-13.5 µm, cheilocystidia numerous, similar to pleurocystidia but shorter. hymenophoral trama: heteromerous, inter-mixed, oleiferous hyphae present. context of pileus: white, unchanging; structure heteromerous, clamp connections absent. taste: lamellae and context mild. chemical characters: formalin on context—n.r.; phenol on context—slowly deep vinaceous; FeSO4 on context—rapidly salmon pink; guaiacol on stipe base—n.r.: KOH on pileus—bleaching action leaving area orange-red; on context—n.r.; NH4OH on pileus—green; on context —n.r.

Habitat

Solitary or gregarious under Nothofagus.

Latin

Pileus centraliter depressus 3.5-6.5 cm diam., obscure griseo-magenteus ad sordide griseo-viridem, viscidus, glaber; veli vestigia deficiunt; margines integri, non pectinati. Lamellae adnatae, ad 5 mm altae, pallide cremeo-albae; lamellulae rarae. Stipes 2-4 cm longus, plus minusve aequalis, 1-1.5 cm diam., solidus, siccus, concolor cum pileo. Sporae late ellipticae 7.5-10,5 x 7-9 µm amyloides dense ornatae.

Notes

Russula atrovirens also gives a distinctive green colour reaction of the pileus to NH4OH and the spores are densely verrucose. It belongs in section Rigidae Fr. and is possibly best placed in subsection Amoeninae Sing. as defined by Singer ( 1962). Considerable variation in colours of both pileus and stipe occurs in this species. The green colours of the pileus are not always dominant in fresh material, but quickly appear when fructifications are dried.

Typification

holotype, pdd 30655

McNabb, R.F.R. 1973: Russulaceae of New Zealand. 2. Russula Pers. ex S.F. Gray. New Zealand Journal of Botany 11(4): 673-730.

Russula roseostipitata McNabb 1973

Collections Examined

Under N. solandri, Canterbury: Kowai Bush, 5.ii.l969, R. F. R. McN., (holotype, pdd 30659); wellington: Tongariro National Park, I.V.1967, 2.V.1967, R. F. R. McN. (pdd 26602, 26601) Oturere Stream, 8.iv.l965, R. F. R. McN. (pdd 26932).

Description

pileus: 2-6 cm diam., convex when young, centrally depressed at maturity, slightly viscid under wet conditions, otherwise dry, finely sub-pruinose to pruinose under lens, velar remnants absent, deep greyish magenta, often dark grey to black and finely creviced giving a sooty appearance towards margins, sometimes with faint greenish yellow patches; margins entire non-pectinate. Cuticle composed of erect, thin-walled or slightly thick-walled, smooth or finely roughened, septate, hair like hyphae to 150 µm long, 3.5-7 µm diam., without coloured contents in KOH, terminal cells unspecialised, tapering apically, originating from a layer of sphaerocysts 5-10 cells deep; pilocystidia absent. lamellae: adnate, crowded, thin, simple or occasionally forked near stipe, to 5 mm deep, cream to pallid ochraceous, not discoloured at maturity but edges occasionally tinted with colours of stipe, lamellulae rare or absent. stipe: 2-4.5 cm long, ± equal or expanded basally, 0.5-1 cm diam., dry, solid or slightly chambered at maturity, finely furfuraceous under lens, pink, pinkish red, pinkish magenta, or dull greyish red, flesh often showing through; flesh white, unchanging on exposure to air. Cuticle composed of interwoven, repent, thin-walled, septate hyphae 3.5-6 µm diam., terminal cells projecting and aggregated into clumps; caulocystidia absent. spores: spore print not obtained; spores broadly elliptical, obliquely apiculate, apiculus to 1.5-(2) µm long, 10-13 X 9-11.2 µm, ornamentation of dense, amyloid or partially inamyloid, truncated spines to 1.5 µm high, isolated or in small confluent groups, rarely adjacent spines joined basally by fine amyloid ridges, plage distinct. hymenium: basidia hyaline, clavate, 35-47 XI 1-15 µm, 4-spored, sterigmata to 8 µm long; pleurocystidia scattered, numerous, broadly fusiform, hyaline, thin-walled, contents sparse, refractive in KOH, projecting to 15 µm beyond basidia, 49-73 X 10-16.5 µm, cheilocystidia numerous, similar to pleurocystidia but shorter. hymenophoral trama: heteromerous, intermixed, oleiferous hyphae rare. context of pileus: white, unchanging; structure heteromerous, clamp connections absent. taste: lamellae and context mild. chemical characters: formalin on context —n.r.; phenol on context—slowly deep vinaceous; FeSO4 on context— rapidly greyish green; guaiacol on stipe base—n.r.; KOH on pileus— magenta colour disappearing leaving area orange-red; on context—n.r.; NH4OH on pileus and context—n.r.

Habitat

Solitary or gregarious under Nothofagus.

Latin

Pileus convexus, centraliter depressus 2-6 cm diam., saturate griseo-magenteus, subtiliter pruinosus; veli vestigia deficiunt; margines integri non pectinati. Lamellae adnatae ad 5 mm altae, pallide ochraceae; lamellulae rarae. Stipes 2-4.5 cm longus, plus minusve aequalis, 0.5-1 cm diam., siccus, solidus, roseo-magenteus. Sporae late ellipticae 10-13 x 9-11.2 µm, amyloides vel partim amyloides dense ornatae.

Notes

The species is characterised by the cream to pallid ochraceous lamellae, the densely ornamented spores, and the greyish green colour reaction of the context with FeSO4 Russula roseostipitata belongs in section Rigidae, although it is difficult to place it in any of the subsections recognised by Singer (1962). The distinctive cuticular structure indicates that it belongs near subsection Virescentinae.

Typification

holotype, pdd 30659