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Go to the NZFungi website for more indepth information on Russula rimulosa. Russula rimulosa

Synonyms

Russula rimosa

Biostatus

Present in region - Indigenous. Endemic

Images (click to enlarge)

 

Caption: Fig. 34 - Russula rimosa (x 3/4).

Owner: J.A. Cooper

Owner: J.A. Cooper

Owner: P. Leonard
 

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: 6-10 cm diam., hemispherical when young, centrally depressed at maturity, slightly viscid under wet conditions, otherwise dry, subpruinose or finely rimose-areolate in centre, adpressed-squamulose or finely rimose towards margins, deep fawn, brown, or dark brown in centre, paling to light brown, brownish orange, or greyish brown with a mottled appearance towards margins; margins entire, thick, non pectinate. Cuticle slightly gelatinised at maturity, composed of ± repent, obliquely ascending, or occasionally erect, interwoven, thin-walled, septate hyphae 2.5-7 µm diam., with yellow-brown contents in KOH, terminal cells tapering apically, unspecialised; pilocystidia absent. lamellae: adnate to subdecurrent moderately crowded, moderately thick, simple or occasionally forked near stipe, to 10 mm deep, creamy white to sordid creamy white with pallid grey tints, not discoloured at maturity, lamellulae rare. stipe: 3-6 cm long, ± equal or slightly expanded basally, 1.5-3 cm diam., solid or slightly hollowed at maturity, dry, finely felted to subvelutinate, pallid brown or greyish brown, paling to brownish white basally; flesh sordid white to brownish white, rather coarsely granular, browning slightly on exposure to air. Cuticle composed of interwoven, repent, thin-walled, septate hyphae 2.5-7.5 µm diam., terminal cells unspecialised, tapering apically, projecting at right angles or obliquely and forming a loose palisade; caulocystidia absent. spores: spore print white; spores broadly ovate, obovate, or broadly elliptical, prominently obliquely apiculate, apiculus to 2.5 µm, long, 8.5-10.5 X 7.5-9.5 µm, ornamentation of moderately dense, amyloid verrucae and crests to 0.7 µm high, joined by fine amyloid ridges and forming an almost complete reticulum; plage absent. hymenium: basidia hyaline, clavate, 42-61 X 9-13 µm, 4-spored, sterigmata to 7.5 µm long; pleurocystidia scattered, numerous, fusiform to subclavate, thin-walled, contents refractive in KOH, projecting to 20 µm beyond basidia, apices acuminate, capitulate, or mucronate, 55-100 X 6.5-11 µm: cheilocystidia sparse, similar to pleurocystidia but shorter. hymenophoral trama: heteromerous, ± bilateral; mediostratum composed of sphaerocysts and connective hyphae, pigmented and sharply delimited from the lateral stratum composed of rather loosely interwoven connective hyphae. context of pileus: white to sordid white, browning slightly on exposure; structure heteromerous, clamp connections absent. taste: lamellae and context mild. chemical characters: formalin on context—slowly vinaceous; phenol on context—slowly deep vinaceous; FeS04 on context—rapidly dull greyish green; guaiacol on stipe base— rapidly salmon pink, darkening with time; KOH on pileus—darkening slightly; on context—faint yellowing; NH4OH on pileus and context— n.r.
Habitat: >Solitary or in pairs under Leptospermum.

Article: Pennycook, S.R. (2003). Nomenclatural revisions of New Zealand agarics and boletes. New Zealand Journal of Botany 41(3): 501-502 (http://www.rsnz.org/publish/abstracts.php).
Description: In a final paper published after his premature death in 1972, New Zealand mycologist Ross McNabb described 32 new endemic species of the genus Russula (McNabb 1973). All of these continue to be accepted as distinct taxa, but three of his names,Russula atrovirens, R. littoralis, and R. rimosa, are homonyms of earlier names, and are thus nomina illegitima, requiring new names. The first of the three was renamed by Buyck (1990) [as Russula atroviridis, for R. atrovirens]; the other two are renamed here.
Russula rimulosa Pennycook, nom. nov.ç Russula rimosa McNabb, N.Z. J. Bot. 11, 698 (1973), nom. illegit., non Murrill 1946.
ETYMOLOGY: referring to McNabb's description of the pileus as "finely rimose".