PDD 30661 – Russula cremeoochracea McNabb
Data provider:
New Zealand Fungarium - Te Kohinga Hekaheka o Aotearoa
Barcode:
PDD 30661
Type status:
Holotype
Specimen type:
Packet
Database record added:
06 June 2001
Database record updated:
24 February 2023
Components
Primary component
Active identification
Determined name:
Russula cremeoochracea
Determiner:
R.F.R. McNabb
Identification date:
Preferred name:
Russula cremeoochracea McNabb
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Russulales
Family:
Russulaceae
Identification type:
Determination
Type status:
Holotype
Associations:
has host Nothofagus menziesii (Hook.f.) Oerst.
Substrate:
ground
Other components
Active identification
Determined name:
Nothofagus menziesii (Hook.f.) Oerst.
Determiner:
Identification date:
Preferred name:
Lophozonia menziesii (Hook.f.) Heenan & Smissen
Division:
Tracheophyta
Class:
Magnoliopsida
Order:
Fagales
Family:
Nothofagaceae
Identification type:
Determination
Present:
no
Collection events
Primary collection event
Collection event type:
Unknown
Standard locality
Location:
Oparara, Fenian Track
Georeferences:
Latitude and Longitude (WGS84):
-41.2018 172.178
Verbatim locality:
Oparara, Fenian Track
Verbatim collector:
R.F.R. McNabb
Standardised collector:
Robert F. R. McNabb
Collectors reference no.:
RFRM 122 (Russula)
Verbatim date:
1968/01/09
Start date:
1968-01-09
New Zealand Area Codes:
Nelson
Country:
New Zealand
Native lands:
Ngāi Tahu
Ngāti Apa ki te Rā Tō
Ngāti Rārua
Ngāti Toa Rangatira
Te Atiawa o Te Waka-a-Māui
Georeferences:
New Zealand Map Grid:
2441700E 6000330N (WGS84 -41.200811 172.185915)
Specimen notes
Public Note:
[McNabb:] 122 (k18, holotype), maybe 286 (or aucklandica). PILEUS: 4cm diam., deeply centrally depressed, smooth, slightly viscid, faintly innately pruinose under lens, no velar remnants, margins entire, not marked, pallid creamy white to pallid dull yellow, often stained with brown. GILLS: thick, adnate, relatively crowded, to 3mm deep, lamellae simple or as often forked near stipe, lamellulae present, numerous, often in a broken sequence. STIPE: 2-3cm long, more or less equal, 0.8-1.2cm diam., dry, annulus absent, smooth, faintly innately stretched reticulate, pure white, stained with yellowish brown at maturity. Flesh white unchanging. CONTEXT OF PILEUS: white, unchanging. TASTE: gills and context – not distinctive. CHEMICAL CHARACTERS: formalin – nr.r; phenol – slowly deep vinaceous red; FeSO4 – immed. salmon pink; guaiacol on stipe base – n.r.; faint pinkish; KOH on pileus – darkening slightly; on context – n.r. NH4OH on pileus and context – n.r. HABITAT: in pairs under Nothofagus mennziesii, Nelson: Oparara, Feenian track, 9.1.1968. Coll. R.F.R. McNabb. ILLUSTRATION: painting K18. Cuticle of pileus compressed or interwoven +- repent, hyaline, septate, thin-walled hyphae 2.5-5um diam., without distinctive contents in KOH, terminal cells often irregular inflated, unspecialised, often aggregated and projecting in groups. No signs of pilocystidia with granular refractive contents. Cuticle of stipe similar to that of pileus, or hyaline, thin-walled septate hyphae, interwoven +- parallel, terminal cells unspecialised, projecting in groups. No caulocystidia seen. Hymenophoral trama intermixed, subhymenium cellular. Basidia subclavate to irreg. clavate, hyaline, 4-spored, sterigmata to 7um long, 29-40 x 7.5-9.8um. Pleurocystidia sparse, scattered, projecting to 50um beyond basidia, broadly fusiform with acuminate parallel hyphae, strangulated or capitulate apices, hyaline, thin-walled, contents refractive in KOH, 70-112 x 12-18um. Spores ovate, obliquely apiculate, apiculus to 1-(1.5)um long. 7.5 - 9.8 x 5.2-6um. Ornamentation of fine, amyloid verrucae c0.3um high, isolated or occasionally joined by fine ridges in groups of 2-3. Plage indistinct. [Ridley:] Basidiospores (6.5)7-8.25 x 5.25-6.5(-7.5) um, [6.5-8 x 5-6.5 um] Qm 1.28, broodly ellipsoid, Q 1.10-1.33(-1.50), subglobose to broadly ellipsoid, hyaline. Ornamented with moderately crowded, fine to coarse, amyloid, verrucae to 0.75 um, mostly isolated or in confluent groups, connected by fine, low, amyloid ridges, occasionally giving the appearance of a partial reticulum. Suprahilar plage indistinct, inamyloid, finely roughened, c. 2 um wide. Hilar appendage obconical, oblique, 1.25-1.75 um long. (Fig. 24e). It was difficult to distinguish the plage using the light microscope, due to the low ornamentation and sparse ridges. Using the SEM a distinctly smooth plage although slightly rugulose at its margin, was observed. The ornamentation was type IV, approaching type IIIB, depending on the amount of ridge formation. [Cooper:] dried gills not orange, concolorous with cap. No pilocystidia seen, a few oleiferous hyphae but not cystidia. Cap a weak ixocutis. Spores without as many connectives as McNabb would suggest and with plage, without amyloid spot. Spores length=6.3–8.1µm (µ=6.9, σ=0.5), width=4.4–5.6µm (µ=5.0, σ=0.3), Q=1.3–1.5µm (µ=1.4, σ=0.1), n=20. Material didn't revive well - no good uncollapsed basidia seen. SV-ve, definitely, checked multiple cap sites, and no granules either. No fuchsinophile hyphae. Ridley has (6.5)7-8.25 x 5.25-6.5(-7.5), Q=1.28 (a lower Q, and we disagree on distinctiveness of plage). McNabb's notes on the type indicate that lamellulae were present in a sequence, but the dried material does not show lamellulae.
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