New Zealand Fungarium - Te Kohinga Hekaheka o Aotearoa

PDD 26566

Holotype

Packet

11 April 2011

24 February 2023

Russula solitaria

R.F.R. McNabb

Russula solitaria McNabb

Basidiomycota

Agaricomycetes

Russulales

Russulaceae

Determination

Holotype

has host Nothofagus truncata (Colenso) Cockayne

ground

Nothofagus truncata (Colenso) Cockayne

Fuscospora truncata

Tracheophyta

Magnoliopsida

Fagales

Nothofagaceae

Determination

no

Unknown

Rotorua, Mangorewa Gorge

Latitude and Longitude (WGS84):  -37.9618  176.197 

Rotorua, Mangorewa Gorge

R.F.R. McNabb

Robert F. R. McNabb

RFRM 77 (Russula)

1967/04/26

1967-04-26

New Zealand

Bay of Plenty

Ngāti Rangiwewehi

Raukawa

Tapuika

New Zealand Map Grid:  2784760E 6353510N  (WGS84 -37.978288 176.12619)

Spore print

[McNabb:] Holotype. Group 16, #77. PILEUS: 6 cm diam., shallow-infundibuliform, definitely viscid and sticky, glabrous, no indications of velar remnants, innately radially marked slightly but not greatly so, dull brownish (6B3 very good match) 7E3 towards margins, darker slightly reddish-brown in centre (c 7D4-5). Margins radially marked for up to 1 cm from edge but not particularly deeply so. GILLS: white to dull white, crowded, rather thin, not discoloured, lamellae simple or more often forked close to stipe, not forked at margins, lamellulae very occasionally present but in no sequence, to 5 mm deep. STIPE; 3.5 cm long, equal, 8 mm diam., dry, annulus absent, no indications of velar remnants, glabrous, very finely felted and matte under lens, rather innately longit. stretched-reticulate , very pallid reddish-grey, (pallid -7B2 , 8B2)., Flesh white, firm, unchanging. CONTEXT OF PILEUS; white, firm, unchanging. SMELL: not noted. TASTE: gills and context not distinctive. SPORE PRINT: Crawshay A when fresh, pure white. CHEMICAL CHARACTERS: Formalin on context - n.r. Phenol - slowly dull dark brown with faint vinaceous tints. FeSO4 on context – immediately greyish-red (c8C3-4). Guaiacol on stipe base - rapidly salmon pink, darkening to pink, then bright greyish-red. KOH on pileus - n.r. ?faint darkening KOH on context - n.r. NH40H on pileus and context - n.rs. HABITAT: solitary under Nothofagus truncata, Auckland, Rotorua, Mangorewa Gorge, 25/4/67, Coll. R.F.R. McNabb. Cuticle composed of a layer or rather loosely interwoven ascending hyphae arising from a compact more or less repent interwoven subcutis. Epicutis heavily gelatinised and the ascending hyphae embedded in a gelatinous matrix. Hyphae thin-walled, hyaline, septate, branched rather regular in diam., 2-5um diam., without brown content, terminal cells unspecialised, tapering apically. Context heteromerous composed of nests of sphaerocysts and thin-walled septate connective hyphae. Hymenophoral trama distinctive, mediostratum cellular, composed of sphaerocysts and connective hyphae, subhymenium quite well delimited. composed of rather loosely interwoven filamentous hyphae, not in the least cellular in section. Spores broadly obovovate to pip-shaped obliquely apiculate, apiculus to 2um long, 7.4-9.8 x 5.5-7.2um ornamentation of rather densely crowded, flat-topped verrucae, usually solitary, but occasionally two adjacent verrucae joined, there is no indication of a partial reticulum in any of the spores. Ornamentation to 0.75um high (Type 6 of Pearson). Cheilocystidia not seen. Edges of gills xxx with functional basidia, and or occasionally a pleurocystidium-shaped structure. Pleurocystidia projecting to 25um beyond basidia, arising from deep within subhymenium scattered, not particularly numerous, hyaline, thin-walled with refractive contents in KOH, fusiform, broadly fusiform, with bluntly rounded acuminate mucronate or occasionally sparingly strangulated apices, 55-94 x 6.5-9.8. Basidia clavate hyaline 4-spored sterigmata to 7um long, 42-58 x 7.8-10.4um. Hymenium composed of basidia pleurocystidia and occasionally thin-walled septate cylindrical to subclavate paraphyses. Covering layer of stipe composed of an interwoven layer of hyaline thin-walled septate hyphae without brown content, 2.5-6um diam., with terminal cells occasionally projecting slightly at right angles or obliquely. Terminal cells not forming a palisade at all, unspecialised, acuminate or slightly strangulated apically. Ornamentation to 0.7um high, of verrucae, isolated in small confluent groups, or joined by fine amyloid ridges, apiculus to 1.5-(2)um long, 6.8-8.8 x 5.6-7um. [Ridley:] Basidiospores 7.2-85 x 5-6 um [7-9 x 5.5-7.5 um],. Qm 1.42, ellipsoid, Q1.20-1.61,broadly ellipsoid to elongate, hyaline. Ornamented with moderately crowded, coarse, variously sized, mostly acute, amyloid verrucae to 0.75(-2) um, in confluent groups of 2 to 3, or appearing isolated, joined by very fine, amyloid ridges, forming a partial reticulum, SEM shows an extensive reticulum of fine, low ridges. Suprahilar plage inconspicuous, inamyloid, roughened, c. 2 um wide. Hilar appendix obconical, oblique, to 2um long. (fig. 25e). The original description noted the absence of a plage. However, both under the light microscope and SEM, the plage could be distinguished, albeit with difficulty with the light microscope. McNabb's illustration of the basidiospores could not be reconciled with his written description as the former depicts small basidiospores 6.5-6.75 x 4.5-4.75 um) with low, obtuse verrucae. The ornamentation was type IIIB. [Cooper:] No lamellulae. SV-ve. Spores from print. Small indistinct plage, mostly no amyloid spot but a few with a plage elongate one. Spores length=6.2–7.7µm (µ=6.8, σ=0.4), width=4.5–5.8µm (µ=5.1, σ=0.3), Q=1.2–1.5µm (µ=1.3, σ=0.1), n=20. Oranamentation to 0.9um high. Cap surface dominated by long thin acuminate hairs. Pleurocystidia same as cheilocystidia. [Cooper:] Holotype is a single fruitbody