Species flashcards

Description

Cap: 7-12 cm in diameter; hemispherical when young, convex, then spreading; grayish-brown, dark gray, blackish-brownish; the skin overhangs the cap margin.

Tube layer: Curved before the stem; small-pored; dirty white initially, then grayish-brown.

Stem: 12-20 cm long, 2-4 cm thick; often slightly ventricose in the middle, may taper at the base; whitish base with dark gray, blackish, irregularly arranged or network-connected scales, slightly greenish at the base.

Flesh: Softening in the cap, hardening in the stem; reddening when cut, then grayish-black, turning blue or green in the base; smell taste not characteristic.

Spore: Brown; 13-19 x 5-6 µm; spindle-shaped, smooth,

Occurrence: From May to October, exclusively under poplar trees, locally common mushroom species.

Edibility: Edible, marketable.

Confusion: Cannot be confused with a poisonous species. Similar to the edible black-capped scaber stalk.

Note: Leccinum is an old Italian word meaning mushroom. duriusculum means somewhat stiff, referring to its flesh, which hardens, becomes rigid.

Species description: The use of the name Leccinum duriusculum is attributed to Singer from 1947. Its original name Boletus duriusculus comes from the description of the Hungarian-Croatian Stephan Schulzer von Müggenburg mycologist from 1874.

Taxonomy

1. PhylumBasidiomycota
2. ClassAgaricomycetes
3. OrderBoletales
4. FamilyBoletaceae
5. GenusLeccinum

• Species: duriusculum
• Described by: (Schulzer ex Kalchbr.) Singer (1947)
• Hungarian name: nyárfa-érdestinóru
• Lifestyle: mycorrhizal
• Edibility: edible