Name: Entoloma nigroviolaceum
Most Confident Observations:
Copyright © 2015 Davide Puddu (Davide Puddu)
Version: 2
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First person to use this name on MO: Nathan Wilson
Editors: Dmitriy Bochkov

Nomenclature:

Rank: Species

Status: Accepted

Name: Entoloma nigroviolaceum

ICN Identifier: missing

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Citation:

Deprecated Synonyms: Leptonia nigroviolacea

Classification:

Domain: Eukarya

Kingdom: Fungi

Phylum: Basidiomycota

Class: Agaricomycetes

Order: Agaricales

Family: Entolomataceae

Genus: Entoloma

Lifeform:
Brief Description: [See More | Edit]

The violaceous colour and fibrillose-striate stipe are distinctive far Entoloma nigrovìolaceum. Entoloma viiduense differs by having distinct blue-coloured fruitbodies when young, and a polished stipe.

Pileus 10-50 mm broad, hemispherical to convex then expanding, slightly depressed to distinctly umbilicate with involute then deflexed margin, not hygrophanous, not translucently striate, dark violaceous-black at first then violaceous-brown, entirely tomentose or squamulose, then radially fibrillose and glabrescent at margin, almost squarrose at centre. Lamellae, L = 24-40, l = 3-7, moderately distant, broadly adnate to deeply emarginate, segmentiform to ventricose, white then pink, finally sordid grey-pink or brown-pink, with concolorous, entire edge. Stipe 25-70 × 3-5(-7) mm., cylindrical or compressed, violaceous or violaceous-grey, at apex concolorous with pileus, downwards slightly paler, minutely pruinose at apex, downwards silky striate, never entirely smooth, sometimes scattered flocculose-squamulose, white tomentose at base. Context pale blue violaceous in cortex and white in inner parts.

Smell not distinctive.

Taste mild or oily-rancid.

Spores (9.0-)9.5-13.5 × 7.0-9.0(-10.0) µm, Q = 1.2-1.7, irregularly 6-9 angled in side-view. Basidia 4-spored, clampless. Lamella edge fertile. Cheilocystidia absent. Pileipellis a transition between a cutis and a trichoderm at margin, towards centre more distinctly a trichoderm or forming a transition to a hymeniderm, made up of inflated terminal elements, 35-120 × 15-30 µm. Pigment violaceous, intracellular in pileipellis. Clamps absent.

Habitat: In mossy grasslands, also found among living Sphagnum. Aug.-Sept.

Distribution: So far only known from a few localities in Scotland.

Descriptions: [Create]

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