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Lactarius uvidus

Purple-Staining Milk Cap

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

Names across languages

  • English: Purple-Staining Milk Cap
  • German: Klebriger Violett-Milchling
  • Finnish: Korpirousku
  • Estonian: Kahkjas riisikas
  • Russian: Млечник мокрый

The scientific profile

From the latest record: 2026-09-19.

Hymenium

Gills fairly crowded; whitish to pale cream when young, becoming pale buff with age

Cap

Convex when young, later flat to shallowly depressed; smooth, viscid to slimy when fresh; pale violet-grey, lilac-grey to buff-brown, darkening with age; unzoned or faintly zoned

Hymenium Attachment

Adnate to shortly decurrent

Stipe

Cylindrical, pale cream to whitish, smooth, sometimes slightly viscid when young; becoming hollow with age; ring absent

Spore print

Spore print pale cream to pale yellowish

Ecology

Mycorrhizal mainly with birch and willow; damp woodland, bog margins and mossy acidic soils; solitary to gregariously; summer to autumn

Edibility

Not recommended; bitter, regarded as potentially poisonous

Fruit body

Fruit body small to medium; stipe ~3–7 cm long and ~0.6–2.5 cm thick

Dimensions

Cap ∅ ~3–10 cm

Flesh

Whitish to buff, firm and brittle; white latex and exposed flesh slowly stain lilac

Chemical reactions

KOH green on cap surface

Odour

Faintly fruity, indistinct

Taste

Mild initially to bitter

Microscopy

Spores subglobose to broadly ellipsoid, ~7.5–11 × 6.5–8.5 µm, ornamented with amyloid broad ridges ~0.5–1 µm high forming an incomplete reticulum; pleuro- and cheilomacrocystidia fusiform to subventricose; pileipellis an ixocutis

Overview

Slimy lilac-grey milkcap with white latex staining intensely violet-purple

1838). Epicr. Syst. Mycol. (Upsaliae): 338 (’1836-1838′).

Field encounters

19/Sep/2026, 3:00 PM

Nedrema LKA, Pärnu county, Eesti

Wooded meadow nature reserve, under oak, birch, aspen trees, in damp grassy 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

#lactariusuvidus #mushroomphotos #fungimacro #purplestainingmilkcap #naturephotography

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