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 Russula allochroa
BiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge) | 
Caption: C-3905
Owner: Herb. PDD | 
Owner: P. Leonard | 
Caption: Dried type specimen
Owner: Herb PDD | 
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: 3.5-7.5 cm diam., convex when young, centrally depressed at maturity, slightly viscid under wet conditions, otherwise dry, glabrous, finely felted under lens, velar remnants absent, white when first emerging from soil, darkening to creamy brown or pallid yellowish brown with age; margins entire, thick, non-pectinate. Cuticle 150-250 µm thick, composed of ± repent or obliquely ascending, interwoven hyphae and pilocystidia; hyphae thin-walled, septate, 2.5-5 µm diam., terminal cells unspecialised; pilocystidia sparse, cylindrical to fusiform, thin-walled, apices length, 4-7 µm diam. lamellae: adnexed to adnate, 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: 1.5-2.5 cm long, ± equal, 1-1.7 cm diam., stout, solid, dry, glabrous, finely felted under lens, white; flesh white, unchanging on exposure to air. Cuticle similar to that of pileus: caulocystidia similar to pilocystidia. spores: spore print white; spores broadly elliptical, obliquely apiculate, apiculus to 1.5-(2) µm long, 8.5-11.5 X 8-10.5 µm, ornamentation moderately dense, of amyloid or partially in amyloid truncated spines and crests to 1.4-(2) µm high, in confluent groups, joined by moderately coarse to fine amyloid ridges and forming a partial reticulum, or occasionally isolated; plage indistinct. hymenium: basidia hyaline, clavate, 50-83 X 10-14 µm. 4-spored, sterigmata to 8.5 µm long; pleurocystidia scattered, numerous, sub-clavate to fusiform, hyaline, thin-walled, contents refractive in KOH, projecting to 20 µm beyond basidia, apices bluntly acuminate, occasionally mucronate, strangulate, or capitulate, 63-115 X 8-13.5 µm; cheilocystidia 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 bitter, context slightly bitter. chemical characters: formalin on context—n.r.; phenol on context—slowly deep vinaceous; FeSO4 on context—slowly faint salmon pink; guaiacol on stipe base—slowly faint pink, darkening to pinkish red; KOH on pileus—darkening; on context—n.r.; NH4OH on pileus and context—n.r. acuminate or strangulate, contents refractive in KOH, of variable
Habitat: gregarious under Leptospermum.
Notes: This species also appears to belong to the section Compactae Fr. subsection Plorantes Bat. of Singer (1962) or of Lacterioideae of Shaffer (1964).
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