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Lactarius pyrogalus

Fiery Milkcap

Lactarius pyrogalus — 2026-09-19
Scientific identification
Lactarius pyrogalus (Bull.) Fr.
Family
Russulaceae
Class
Agaricomycetes
Genus
Lactarius

Names across languages

  • English: Fiery Milkcap
  • German: Scharfer Hasel-Milchling
  • Finnish: Pähkinänrousku
  • Estonian: Tuliriisikas
  • Russian: Млечник жгуче-млечный

The scientific profile

From the latest record: 2026-09-19.

Hymenium

Gills moderately spaced to distant; pale yellow to ochre-yellow when young, becoming orange-ochre with age

Cap

Convex when young, later centrally depressed to funnel-shaped; smooth, slightly viscid when moist; grey, grey-brown to grey-ochre, sometimes with olive or lilac tints; weakly zoned

Hymenium Attachment

Adnate to slightly decurrent

Stipe

Cylindrical to slightly tapering toward base; pale grey-brown to buff, usually paler than cap; smooth, becoming hollow with age; ring absent

Spore print

Spore print pale ochre to yellowish-ochre

Ecology

Mycorrhizal almost exclusively with hazel; deciduous and mixed woodland, coppices, hedgerows and woodland edges; solitary, scattered or gregariously; summer to autumn

Edibility

Inedible, acrid latex

Fruit body

Fruit body small to medium; stipe ~2.5–6.5 cm long and ~0.8–2 cm thick

Dimensions

Cap ∅ ~3–10 cm

Flesh

Whitish to pale grey, brittle; abundant white latex, drying yellow-olive to grey-green on damaged gills

Chemical reactions

KOH turns latex yellow-orange to golden yellow; FeSO₄, NH₄OH and phenol negative

Odour

Faintly fruity to apple-like

Taste

Extremely acrid, burning

Microscopy

Spores broadly ellipsoid, ~6.5–8 × 5–7 µm, ornamented with amyloid warts and broad connecting ridges forming an incomplete zebra-like network; basidia 4-spored; pleurocystidia fusiform to ventricose

Overview

Grey hazel milkcap with distant yellow gills and fiercely burning white latex

1838). Epicr. Syst. Mycol. (Upsaliae): 339 (’1836-1838′).

Field encounters

19/Sep/2026, 4:08 PM

Nedrema LKA, Pärnu county, Eesti

Wooded meadow nature reserve, under oak and hazel trees, in mossy soil with decaying leaves remains

58°32'18.2"N 24°04'20.1"E

🌡️ 17°C 🌥️ Mostly cloudy 💨 Wind 220° SW->NE, 28 km/h

Original Instagram post

Source hashtags

#lactariuspyrogalus #mushroomphotos #fungimacro #fierymilkcap #naturephotography

Back to the collection · Photography and field notes by @fungarium.info