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 Russula cremeoochracea
BiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge) | 
Owner: B.P. Segedin | 
Owner: P. Leonard | 
Caption: Dried type specimen
Owner: Herb PDD | 
Owner: J.A. Cooper | 
Owner: J.A. Cooper | 
Caption: left: guaiac. right: FeSO4.
Owner: J.A. Cooper |
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: 3-5.5 cm diam., convex when young, centrally depressed at maturity, slightly viscid under wet conditions, otherwise dry, glabrous, faintly innately pruinose under lens, velar remnants absent, white to creamy white when first emerging from soil, darkening to cream, creamy ochraceous, cream yellow, or pallid yellowish brown with age, often stained yellowish brown; margins entire, thick, non-pectinate. Cuticle 150-200 µm thick, composed of ± repent or obliquely ascending and aggregated, interwoven, thin-walled, septate hyphae 2.5-6 µm diam., often irregularly inflated, terminal cells unspecialised; pilocystidia absent. lamellae: adnate to subdecurrent, crowded, moderately thick, simple or rarely forked near stipe, to 5 mm deep, white to pallid creamy white, not discoloured at maturity, lamellulae numerous, typically in partial sequence. stipe: 1-3 cm long, ± equal, 0.6-1.2 cm diam., solid, dry, glabrous, faintly innately reticulate under lens, white to pallid creamy white, often stained yellowish brown; flesh white, unchanging on exposure to air. Cuticle similar to that of pileus; caulocystidia absent. spores: spore print pallid creamy white; spores broadly elliptical to broadly ovate, obliquely apiculate, apiculus to l- (1.5) µm long, 6.5-8 X 5-6.5 µm, ornamentation moderately dense, of fine amyloid verrucae to 0.5 µm high, isolated, in confluent groups, or joined by fine amyloid ridges and forming a partial reticulum; plage indistinct. hymenium: basidia hyaline, clavate, 29-55 X 7.5-10.5 µm, 4-spored, sterigmata to 7 µm long; pleurocystidia scattered, moderately numerous, fusiform to broadly fusiform, hyaline, thin-walled, contents refractive in KOH, projecting to 45 µm beyond basidia, apices acuminate, strangulate, or capitulate, 56-112 X 7-16 µm; cheilocystidia sparse or numerous, similar to pleurocystidia but shorter. hymenophoral trama: heteromerous, intermixed, oleiferous hyphae occasionally present. context of pileus: white, firm, 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 salmon pink; guaiacol on stipe base—salmon pink; KOH on pileus—darkening; on context—n.r.; NH4OH on pileus and context—n.r.
Habitat: solitary or in small groups under Leptospermum and Nothofagus.
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