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 Russula roseopileata
BiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge)
Owner: J.A. Cooper | 
Caption: DCY in SV
Owner: J.A. Cooper | 
Caption: Upper: FESO4. Lower: guaiac
Owner: J.A. Cooper |  | 
Owner: B.P. Segedin | 
Caption: fruitbody
Owner: J.A. Cooper | 
Caption: spores and basidia in Melzer's
Owner: J.A. Cooper | 
Caption: pilocystidia
Owner: J.A. Cooper | 
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: 1.5-4.5 cm diam., hemispherical when
young, centrally depressed at maturity, dry at first, becoming viscid with age
and under wet conditions, glabrous or occasionally finely areolately creviced
towards margins, finely innately pruinose under lens, velar remnants absent,
red to dark red in centre, paling to greyish rose, rose, or pink at margins,
sometimes creamy white to pallid cream with pink, rose, purplish grey, or yellowish
tints; margins entire, thin, non-pectinate or faintly pectinate in places. Cuticle
to 150 µm thick, composed of erect, hair-like hyphae and pilocystidia forming
a palisade, becoming disorganised and gelatinised with age; hair-like hyphae
thin-walled, smooth, septate, 2.5-4 µm diam., terminal cells unspecialised;
pilocystidia subclavate to clavate, thin-walled, apices bluntly acuminate, contents
refractive in KOH, 40-100 X 6-12,5 µm. lamellae: adnate, moderately crowded, thin, simple or occasionally forked
near stipe, to 4 mm deep, white, not discoloured at maturity, lamellulae rare
or absent. stipe: 2-4 cm long, ±: equal or slightly expanded
basally, 0.5-1.2 cm diam., dry, solid, finely subpruinose under lens, white;
unchanging on exposure to air. Cuticle a disorganised palisade or thin-walled, septate hyphae and numerous subclavate
to clavate caulocystidia. spores: spore print not obtained; spores broadly
elliptical to ovate, obliquely apiculate, apiculus to 1.5-(2) µm long, 10-12
X 9-10.5 µm, ornamentation of moderately dense, amyloid, truncated spines to
1.5-(1.8) µm high, solitary, in small confluent groups, or joined basally by
fine amyloid ridges and forming an almost complete reticulum; plage inconspicuous.
hymenium: basidia hyaline, clavate, 39-52 X 10,5-15
µm, 4-spored, sterigmata to 7 µm long; pleurocystidia scattered, numerous, fusiform
to broadly fusiform, hyaline, thin-walled, contents refractive in KOH, projecting
to 15 µm beyond basidia, apices acuminate or slightly strangulate, 54-98 X 9-14.5
µm; cheilocystidia similar to pleurocystidia but shorter. hymenophoral
trama: heteromerous,
intermixed. context of pileus: white, unchanging, structure heteromerous,
clamp connections absent. smell: not distinctive. taste: lamellae and context extremely
acrid. chemical characters: formalin on context—n.r.: phenol on context—slowly
deep vinaceous; FeSO4 on context—rapidly salmon pink: guaiacol on stipe base—slowly
pinkish red; KOH on pileus—red colours disappearing leaving area orange; on
context—n.r.; NH4OH on pileus and context— n.r.
Habitat: Gregarious under Nothofagus.
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