Russula umerensis McNabb 1973
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Russula umerensis McNabb, New Zealand J. Bot. 11 715 (1973)
Russula umerensis McNabb 1973
Biostatus
Nomenclature
McNabb
McNabb
1973
715
ICN
Russula umerensis McNabb 1973
NZ holotype
species
Russula umerensis
Classification
Associations
has host
Descriptions
Russula umerensis McNabb 1973
Under (1) N. fusca. Nelson: Karamea, Kongahu, 29.xii.l969, R. F. R. McN. (2) N. menziesii, Nelson: Karamea, Umere, 2.i.l969, R. F. R. and R. J. McN. (holotype, PDD 30664); 8.i.l969, R. F. R. McN.; Umere, 4.i.l970, R. F. R. McN.; 4.i.l970, R. J. McN.; 29.xii.l969, R. F. R. McN. L. Daniels track, 15.V.1969, R. F. R. McN. (3) N. solandri, Canterbury: Kowai Bush, 5.ii.1969, B. Segedin.
pileus: 3.5-8 cm diam., convex when young, centrally depressed at maturity, slightly viscid under wet conditions, otherwise dry, innately subpruinose under lens, velar remnants absent, greyish magenta, pallid greyish violet, paling towards margins, sometimes with pallid red or faint green areas; margins entire, non-pectinate. Cuticle composed of erector obliquely ascending, interwoven hyphae and pilocystidia; hyphae thin-walled, smooth, septate, 2-5 µm diam., terminal cells unspecialised; pilocystidia subclavate, occasionally septate, thin-walled, contents refractive in KOH, to 100 µm long, 3.5-6 µm diam. lamellae: adnate, crowded, thin, simple or occasionally forked near stipe, to 6 mm deep, white to pallid creamy white, not discoloured at maturity, lamellulae rare or absent. stipe: 2.5-4 cm long, ± equal, 0.8-1.5 cm diam., solid, dry, white; flesh white, unchanging on exposure to air. Cuticle composed of repent, interwoven, thin-walled, septate hyphae 2-5 µm diam., caulocystidia numerous, similar to pilocystidia. spores: spore print not obtained; spores broadly elliptical, obliquely apiculate, apiculus to 1.5-(2) µm long, 7.5-10 X 7-8.5 µm, ornamentation moderately dense, of amyloid verrucae and truncated spines to 0.7-(l) µm high, in small confluent groups, joined basally by fine amyloid ridges and forming a partial reticulum, or occasionally isolated; plage conspicuous. hymenium: basidia hyaline, clavate, 35-53 X 9.5-12 µm, 4-spored, sterigmata to 7 µm long; pleurocystidia scattered, numerous, fusiform or clavate, hyaline, thin-walled, contents sparse, projecting to 20 µm beyond basidia, apices bluntly acuminate, strangulate, or capitulate, 49-78 X 7.5-11.5 µm, cheilocystidia rare, similar to pleurocystidia but shorter. hymenophoral trama: heteromerous, intermixed. context of pileus: white, unchanging; structure heteromerous, clamp connections absent. taste: unknown. chemical characters: unknown.
Solitary under Nothofagus.
Pileus centraliter depressus 3.5-8 cm diam., griseo-magenteus, subpruinosus; veli vestigia deficiunt; margines integri, non pectinati. Lamellae adnatae ad 6 mm altae, pallide cremeo-albae; lamellulae rarae. Stipes 2.5-4 cm longus, plus minusve aequalis, -0.8-1.5 cm diam., albus. Sporae late ellipticae 7.5-10 X 7-8.5 µm, amyloides dense ornatae.
holotype, PDD 30664
Taxonomic concepts
Russula umerensis McNabb 1973
Russula umerensis McNabb (1973)
Russula umerensis McNabb 1973
Russula umerensis McNabb (1973)
Russula umerensis McNabb 1973
Russula umerensis McNabb (1973)
Russula umerensis McNabb 1973
Russula umerensis McNabb 1973
Russula umerensis McNabb 1973
Global name resources
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Identification keys
Notes
typification
N. menziesii, [New Zealand], Nelson: Karamea, Umere, 2.1.1969, R. F. R. and R. J. McN. (HOLOTYPE, PDD 30664);
Metadata
1cb1a265-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2000
18 October 2022