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 Russula pseudoareolata
BiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge)
Owner: J.A. Cooper | 
Caption: Upper: FeSO4. Lower: guaiac
Owner: J.A. Cooper | 
Caption: cap surface and subcutis
Owner: J.A. Cooper |  | 
Owner: J.A. Cooper | 
Caption: scale=10um. Spores and cystidia in Melzer's.
Owner: J.A. Cooper | 
Owner: P. Leonard | 
Caption: Dried type specimen
Owner: Herb PDD | |
Article: McNabb, R.F.R. (1973). Russulaceae of New Zealand. 2. Russula Pers. ex S.F. Gray. New Zealand Journal of Botany 11(4): 673-730 (http://www.rsnz.org/publish/abstracts.php).
Description: pileus: 6-8 cm diam., centrally depressed at
maturity, slightly viscid, glabrous in centre, pseudoareolate towards margins,
velar remnants absent, dark brown, dark reddish brown, or brownish orange in
centre, paling to pallid reddish brown, brownish orange, or fawn with a mottled
appearance towards margins; margins entire, non-pectinate. Cuticle slightly
gelatinised at maturity, composed of ± repent or obliquely ascending, interwoven,
thin-walled, septate hyphae 3.5-8 µm, diam., with yellowish brown contents in
KOH, terminal cells unspecialised; pilocystidia absent. lamellae: adnate, moderately crowded, moderately thick, simple or forked
near stipe, to 7 mm deep, pallid cream with faint brown or pinkish brown tints,
not discoloured at maturity, lamellulae rare. stipe: 2.5-4.5
cm long, ± equal, 1.2-2.2 cm diam., solid or slightly chambered at maturity,
dry, finely felted to sub-pruinose under lens, pallid brownish white with faint
pink tints to pallid brown; flesh white to brownish white, unchanging on exposure
to air. Cuticle composed of interwoven, repent, thin-walled, septate hyphae
4-6 µm, diam., terminal cells unspecialised, aggregated and projecting in places,
caulocystidia absent. spores: spore print not obtained; spores broadly
ovate, obovate, or broadly elliptical, prominently obliquely apiculate, apiculus
to 2.5 µm long, 8.5-11 X 7.5-10 µm, ornamentation of moderately dense, amyloid
verrucae and crests to l-(1.5) µm high, joined by fine to moderately fine amyloid
ridges and forming an almost complete reticulum; plage absent. hymenium: basidia hyaline, clavate,
40-67 X 9-13.5 µm, 4-spored, sterigmata to 9 ^m long; pleurocystidia scattered,
numerous fusiform to subclavate, yellow tinted, thin-walled, contents refractive
in KOH, projecting to 25 µm beyond basidia, apices acuminate, capitulate, or
mucronate, 60-90 X 6.5-12 µm cheilocystidia rare, similar to pleurocystidia
but shorter. hymenophoral trama:
heteromerous, ± bilateral; mediostratum composed of sphaerocysts and
connective hyphae, pigmented, sharply delimited from the lateral stratum composed
of rather loosely interwoven connective hyphae. context
of pileus: white to
brownish white, unchanging; structure heteromerous, clamp connections absent.
taste: lamellae and context mild. chemical characters:
formalin on context—n.r; phenol on context— slowly deep vinaceous; FeSO4
on context—rapidly greyish green; guaiacol on stipe base—pallid salmon pink;
KOH on pileus—darkening; on context—n.r; NH4OH on pileus and context—n.r.
Habitat: Solitary or gregarious under Nothofagus.
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