PDD 26541 – Russula tricholomopsis McNabb
Data provider:
New Zealand Fungarium - Te Kohinga Hekaheka o Aotearoa
Barcode:
PDD 26541
Type status:
Holotype
Specimen type:
Packet
Database record added:
11 April 2011
Database record updated:
24 February 2023
Components
Primary component
Active identification
Determined name:
Russula tricholomopsis
Determiner:
R.F.R. McNabb
Identification date:
Preferred name:
Russula tricholomopsis McNabb
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Russulales
Family:
Russulaceae
Identification type:
Determination
Type status:
Holotype
Associations:
has host Nothofagus truncata & Nothofagus menziesii
Substrate:
ground
Other components
Active identification
Determined name:
Nothofagus truncata & Nothofagus menziesii
Determiner:
Identification date:
Preferred name:
Fuscospora truncata
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:
Rotorua, Mangorewa Gorge
Georeferences:
Latitude and Longitude (WGS84):
-37.9618 176.197
Verbatim locality:
Rotorua, Mangorewa Gorge
Verbatim collector:
R.F.R. McNabb
Standardised collector:
Robert F. R. McNabb
Collectors reference no.:
RFRM 99 (Russula)
Verbatim date:
1967/04/25
Start date:
1967-04-25
Country:
New Zealand
New Zealand Area Codes:
Bay of Plenty
Native lands:
Ngāti Rangiwewehi
Raukawa
Tapuika
Georeferences:
New Zealand Map Grid:
2784760E 6353510N (WGS84 -37.978288 176.12619)
Specimen notes
Public Note:
[McNabb:] #99, group 24. Pileus 2.5cm, plano-convex, vinaceous-purple with a greyish-brown tomentum, dry, tomentose-squamulose. Gills bright yellow, only lamellulae present, depressed around apex of stipe, not discoloured. Stipe 3.5cm long, 6mm diam apically, 8mm diam basally, annulus absent, no indications of veil, granular aggregation of patches, pinkish with white flesh beneath showing through. Habitat on rotten wood under Nothofagus truncata/menziessi. Rotorua, Mangorewa Gorge, 25/4/67, Coll. R.F.R. McNabb. Cuticle composed of long hairs arising in fascicles from a cellular subcutis. Hairs to 300um long, smooth (not always smooth and often distinctly scabrous to nodulose) thick-walled, septate, pallid brownish in KOH, slightly tapering apically 3.5-5um. Hairs arising from exterior cells of the cellular layer 8-12 cells deep. Not all exterior cells bear a hair, hairs rather gathered in fascicles rather than continuous over entire surface. Cellular layer compact 65-100um deep. No indications of pilocystidia. Context heteromerous, composed of sphaerocysts and concentric hyphae, clamps absent. Connective hyphae distinctly scabrous to finely nodulose. Spores apiculus to 1.5um long, inamyloid, not particularly oblique , spores +- globose to broadly ellipsoidal, appearing orthotropic, 10-12.4 x 9.5-10.4um. Ornamentation dense flat-topped and isolated spines, heavily amyloid, to 1.5(-1.8)um high, isolated not confluent or joined by amyloid lines or ridges in most instances, occasionally 2-3 adjacent verrucae confluent and very occasionally by fine amyloid lines. Hymenophoral trama cellular, mediostratum of large +- isodiametric cells and connective hyphae, subhymenium of compact small-celled hyphae appearing cellular in section. Cheilocystidia present on gill edge, shorter than pleurocystidia but otherwise no different. Numerous scattered projecting to 30um beyond basidia, hyaline thin-walled contents rather disorganised refractive in KOH, with acuminate or fusiform apices 48-77 x 10.4-13. Basidia hyaline clavate 4-spored sterigmata to 8um long, 37-48 x 11-13um. Surface layer of stipe composed of a layer of repent interwoven filamentous septate hyphae, c 3-5um diam.. At intervals these hyphae are aggregated into clumps with terminal cells slightly inflated and with brownish contents in KOH. The terminal cells are not greatly modified, often have roughened or scabrous walls, are thin-walled, and may reach 7um in diam. definitely not specialised as in caulocystidia. In these clumps the hyphae are arranged obliquely or at +- right angles to the surface Spores broadly elliptical, obliquely apiculate 10.5-11.9 x 9.1-10.5um. Ornamentation of amyloid or partially inamyloid truncated spines to 1.5(-1.8)um high, dense, occasionally solitary joined basally by xxxx fine amyloid ridges, plage distinct. Basidia clavate 4-spored 42-50 x 11.2 - 15.4um Pleurocystidia numerous scattered projecting to 30um broadly fusiform apices acuminate to bluntly acuminate, tinted, thin-walled or very slightly thick-walled. Contents inconspicuous 63-77 x 11.2 - 17.5um. [Ridley:] Basidiospores 8-9.5 x 7-9.25 um [10-12 x 9-10.5 um] Qm 1.05, globose, Q 1.00-1.09, globose to subglobose, hyaline. Ornamented with moderately crowded partially amyloid to amyloid, truncate spines to 1.75 um, single or occasionally in small confluent groups, joined basally by fine, low, amyloid ridges, or isolated, forming a partial reticulum. Suprahilar plage distinct smooth, weakly amyloid c. 2.75 um wide. Hilar appendix obconical oblique, to 2.75 um long. (Fig. 26f). The plage was amyloid and distinct, being surrounded by truncate spines and the ornamentation was type IIIB. [Cooper:] The cap of the type material quite clearly shows the brown hairs, not seen in any other collection - even pilocystidiata. DCY SV-ve. Fuchsinophile hyphae not seen. The cap is covered in the brown spores of a tomentelloid fungus. The cap hairs are brown in KOH and smooth. The ornamentation illustrated by McNabb appears over time in KOH. Cap hairs to 250um. The macrocystidia are often thick-walled, c.f. macrocystidiata. The macrocystidia seem to have a characteristic deeply refractive tip. Spores with plage and very obvious lilac amyloid spot. length=8.2–9.3µm (µ=8.7, σ=0.3), width=7.3–8.2µm (µ=7.7, σ=0.3), Q=1.1–1.2µm (µ=1.14, σ=0.03), n=20, ornamentation to 1.7um.
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