New Zealand Fungarium - Te Kohinga Hekaheka o Aotearoa

PDD 26584

Holotype

Packet

11 April 2011

24 February 2023

Russula albolutescens

R.F.R. McNabb

Russula albolutescens McNabb

Basidiomycota

Agaricomycetes

Russulales

Russulaceae

Determination

Holotype

has host Leptospermum ericoides

ground

Leptospermum ericoides

Kunzea ericoides (A.Rich.) Joy Thomps.

Tracheophyta

Magnoliopsida

Myrtales

Myrtaceae

Determination

no

Unknown

Titirangi, Atkinson Park

Latitude and Longitude (WGS84):  -36.942330  174.657734 

Titirangi, Atkinson Park

R.F.R. McNabb

Robert F. R. McNabb

RFRM 44 (Russula)

1967/03/13

1967-03-13

New Zealand

Auckland

Ngāti Tamaoho

Ngāti Tamaterā

Ngāti Whātua

Ngāti Whātua o Ōrākei

Te Ākitai Waiohua

Te Kawerau a Maki

New Zealand Map Grid:  2658010E 6471520N  (WGS84 -36.946265 174.657607)

[McNabb:] 44 (holotype), 29, 65. PILEUS: 4.5-6.5 cm diam., infundibuliform, slightly viscid, no velar remnants margins very thin, radially ridged and grooved for 1-1.5 cm from edge, creamy white in centre, margins white. GILLS: pallid creamy white, moderately crowded, to 8 mm deep, brittle, lamellae simple or forked close to stipe, not forked near margins, lamellulae very occasionally present but in no particular sequence, not discoloured at maturity. STIPE: 3.5-5.5 cm long, more or less equal, 1-1.5 cm diam., dry, glabrous, annulus absent, velar remnants absent, innately longitudinally fibrous, pure white, occasionally with faint brownish stains, solid or chambered. Flesh white, unchanging. CONTEXT OF PILEUS: white, unchanging. SMELL not recorded; TASTE: gills and context not distinctive. SPORE PRINT: Crawshay A-(B) when fresh. CHEMICAL REACTIONS: Formalin on context - no reaction. Phenol on context - deep red, vinaceous. FeS04 on context - rose to pink. KOH and NH40H on pileus and context - no reactions HABITAT solitary under Leptospermum ericoides, Auckland, Titirangi, Atkinson Park, 13/3/67. Coll. R.F.R. McNabb. Cuticle 125-175um thick, composed of hyaline, thin-walled heavily gelatinised ascending hyphae, loosely interwoven, overlying a layer of +- repent, interwoven hyphae of the same type. Epicutis hyphae devoid of coloured content, septate, 1.5-3.5um diam., with rather ‘crimped’ appearance. the extreme outside of the epicutis is slightly compacted, and contains numerous pleurocystidia-like structures embedded in the surface or slight projecting, either +- at right angles obliquely or repent. Structures fusiform with acuminate to mucronate apices, thin-walled, hyaline, with refractive contents in KOH. 42-74 x 4.5-6.5um. Hymenophoral trama consisting of a mediostratum of +- isodiamteric large cells and connective hyphae and a subhymenium of smaller cells, +- isodiametric , derived from closely compacted short celled filamentous hyphae. Appearing cellular in section. Oleiferous hyphae present. Spores broadly obovate to broadly elliptical, obliquely apiculate, apiculus to 1.75um long, 7.1 - 9.8 x 6.1 – 7.5um dia., Ornamentation to 0.5um high, amyloid, of fine or rather heavy nodulose bands or lines, forming an incomplete to fragmentary reticulum, isolated verrucae present, numerous or rather sparse. No distinctive cheilocystidia present, but a few hair-like paraphyses present on gill edge that could be regarded as unspecialised cheilocystidia. Basidia also present on gill edge. Pleurocystidia projecting to 20um beyond basidia, scattered, not particularly numerous, originating from deep with the sub-hymenium 62-90 x 7.8-11.7um, hyaline. thin-walled, with refractive content in KOH, fusiform to broadly fusiform, acuminate, bluntly rounded, mucronate or +- strangulated apically. Contents distinctly deep red in SV – not blueing. Hymenium composed of basidia and pleurocystidia, no septate paraphyses seen. basidia hyaline, short, clavate, 4-spored sterigmata to 6.5um long, 31-39 x 7.8 – 9.8. Covering of stipe as in preceeding specimen although more disorginised and the hyphal ends and pleuro-like structures only rarely projecting +- at right angles. Spores broadly elliptical obliquely apiculate, apiculus to 1(-1.5)um long. 7-8.4 x 6.3 -7.3um. Ornamentation of amyloid verrucae, to 0.4um high, joined by moderately fine ridges into +- nodulose bands, occasionally isolated, forming an incomplete reticulum. [Ridley:] Basidiospores (6.5)7.25-8 x (6-)6.5-7.5 um, [7-9 x 6-7.5 um] Qm 1.11, subglobose, Q=1-1.23, globose to broadly ellipsoid, hyaline. Ornamented with moderately crowded amyloid, verrucae, to 0.5 um high, occasionally isolated, although usually confluent in groups, joined by coarse to moderately fine, amyloid and inamyloid ridges, forming a partial reticulum. Suprahilar plage indistinct, inamyloid, slightly roughened. Hilar appendix obconical, oblique, up to 15um long (Fig. 24a). The basidiospores tended to be subglobose rather than broadly ellipsoid. The verrucae were distinctive, often slightly constricted at the base thus producing a knoblike appearance. Basidiospore ornamentation was type IIIB. [Cooper:] spores (from print) length=6.2–8.9µm (µ=7.3, σ=0.7), width=5.6–7.5µm (µ=6.3, σ=0.5), Q=1.0–1.3µm (µ=1.2, σ=0.1), n=20, ornamentation = 0.8um. Has plage, without amyloid spot. Cap with oleiferous hyphae and occasional cystidia (like gill cystidia). Gill cystidia infrequent. SV+ve, but reaction is not consistent on all cystidia and only patches of the two type fruitbodies.. No fuchsinophile hyphae. It is difficult to decide if the type shows lamellulae or not. McNabb's notes for the type say 'very occasionally present but in no particular sequence'.