PDD 30660 – Russula tawai McNabb
Data provider:
New Zealand Fungarium - Te Kohinga Hekaheka o Aotearoa
Barcode:
PDD 30660
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 tawai
Determiner:
R.F.R. McNabb
Identification date:
Preferred name:
Russula tawai McNabb
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Russulales
Family:
Russulaceae
Identification type:
Determination
Type status:
Holotype
Associations:
has host Nothofagus fusca (Hook.f.) Oerst.
Substrate:
ground
Other components
Active identification
Determined name:
Nothofagus fusca (Hook.f.) Oerst.
Determiner:
Identification date:
Preferred name:
Fuscospora fusca
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:
Springs Junction, Lake Daniells Track
Georeferences:
Latitude and Longitude (WGS84):
-42.3943 172.257
Verbatim locality:
Lake Daniells Track
Verbatim collector:
R.F.R. McNabb
Standardised collector:
Robert F. R. McNabb
Collectors reference no.:
RFRM 180 (Russula)
Verbatim date:
1969/05/14
Start date:
1969-05-14
Country:
New Zealand
New Zealand Area Codes:
Buller
Native lands:
Ngāi Tahu
Ngāti Toa Rangatira
Georeferences:
New Zealand Map Grid:
2448130E 5876380N (WGS84 -42.317242 172.249452)
Specimen notes
Public Note:
[McNabb:] holotype #180, 181, 187, 193, 199, 209, 210, 291-295, 296-7. Pileus 5-6.5cm centrally depressed, dark purple (14F4), dark magenta, greyish magenta, with yellow or greenish yellow patches in places, margin entire, non-pectinate, surface innately pruinose under lends, sometimes rather rugulose, slightly viscid. Gills distinctly creamy-yellow with magenta to vinaceous discolouring on edges, to 7mm deep, simple or forked, lamellulae occasionally present, not in sequences. Stipe 2.5-4cm long, more or less equal, c 1.5cm diam., solid, dry, finely furfuraceous, c 13B2-3, with white flesh showing thru; fleash white. Context of pileus yellowish white, unchanging. Taste gills slightly but definitely acrid, context mild. Chemical characters formalin n.r., phenol slowly slate grey then vinaceous grey, FeSO4 immediately salmon pink, guiacol n.r., KOH on pileus intensifies a green colour, on context n.r. Habitat gregarious under Nothofagus fusca, Nelson, Lake Daniels Track, 14.5.1969, Coll. R.F.R. McNabb. Cuticle of pileus rather difficult to interpret but appears to consist of a layer of inflated sphaerocyst-like cells c 10 cells deep, with short thin-walled hyaline hairs arising from outermost cells, hairs c 3-5um diam., pilocystidia absent. Basidia hyaline, 4-spored sterigmata to 7um long, 42-53 x 10.5-12 um. Pleurocystidia scaterred numerous projecting to 30um beyond basidia conspicuous, walls to 6um thich in centre but usually -2um thick, tinted, with refractive contents. fusiform, with acuminate apices, or or with capitulate or strangulate apices 60-110 x 9-12.8um. Cheilocystidia numerous crowded on gill edge, mixed with a few short cheilocystidia filamentous septate, +- cylindrical, 3.5-6um diam., without contents. Spores broadly elliptical to ovate, obliquely apiculate, apiculus to 1.5(-2) um long. 8.2 -10.5 x 7.5-9um. Ornamentation to 1um high, not as dense as in R. macrocystidiata, of truncate amyloid verrucae occasional isolated in confluent groups of 2-3 or joined by fine amyloid ridges and forming an incomplete reticulum. Cuticle of stipe composed of +- interwoven hyaline septate hyphae 2.5-5um diam., aggregated in places into clumps and with terminal cells projecting; caulocystidia absent. Spores broadly elliptical, apiculus to 2um long, 8.4-10.5 x 7.7-9.4um, ornamentation of moderately dense amyloid or partially inamyloid truncated spines to 1-(1.5)um long, isolated, or more often joined basally by fine amyloid ridges or in confluent groups. [Ridley:] Basidiospores 8-9.25 x 6.5-8 um, [8.5-10.5 x 7.5-9.5 um] Qm 1.13, subglobose, Q(1.03-)1.10-1.23, occasionally globose, more typically subglobose to broadly ellipsoid hyaline. Ornamented with moderately crowded partially amyloid to amyloid, truncate spines to 1.25 um high, usually single or occasionally in confluent groups of two or three, joined basally by fine, low, amyloid ridges or isolated, forming a partial reticulum. Suprahilar plage distinct, weakly amyloid, flaking, c. 2.75-3 um wide. Hilar appendix obconical, oblique, to 2.75 um long. (Fig. 27a). .Although weakly amyloid the plage was quite distincg and ornamentation was type IIIB. [Cooper:] Cap does not show sub-cuticular pigment. SV-ve, but has violet granules (which appears to be a good character having looked at other tawa, and only seen in tawai and umerensis), Fuchsinophile hyphae not seen. Cap hairs present but not obvious in vertical section. Macrocystidia very thick-walled (c.f. macrocystidiata and tricholomopsis). Spore with plage and clearly amyloid (violet) spot. Spores from gill, length=7.4–8.5µm (µ=7.9, σ=0.3), width=6.0–7.3µm (µ=6.6, σ=0.4), Q=1.0–1.3µm (µ=1.19, σ=0.06), n=20, ornamentation to 1.5um.
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