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Agrocybe molesta

bearded fieldcap

Agrocybe molesta — 2026-07-12
Scientific identification
Agrocybe molesta (Lasch) Singer
Family
Strophariaceae
Class
Agaricomycetes
Genus
Agrocybe

Names across languages

  • English: bearded fieldcap
  • German: Rissiger Ackerling
  • Finnish: Valkopiennarsieni
  • Estonian: Mõrand-põldseen
  • Russian: Агроцибе неприятная

The scientific profile

From the latest record: 2026-07-12.

Hymenium

Gills close to crowded, whitish at first, becoming dull greyish-brown to clay-brown as spores mature

Cap

Convex when young, later broadly convex to nearly flat; whitish, cream to dull yellowish, slightly tacky when fresh but soon dry; often cracking with age and retaining pale veil fragments around the margin

Hymenium Attachment

Adnate to adnexed

Stipe

Rigid, cylindrical, whitish, sometimes browning toward the base; with a thin, fragile and often short-lived whitish ring

Spore print

Spore print: Brown

Ecology

Saprobic in lawns, meadows, fields, grassy roadside verges and gardens; solitary, scattered, gregarious or occasionally in fairy rings; late spring to summer

Edibility

Reported as edible after thorough cooking but bitter and of poor quality

Fruit body

Fruit body small to medium; stipe ~5–10 cm long, ~0.3–1.5 cm thick

Dimensions

Cap ∅ ~2.5–8 cm

Flesh

Flesh white, firm, unchanging when cut

Chemical reactions

KOH negative to yellowish on the cap surface

Odour

Indistinct to slightly mealy

Taste

Indistinct, mealy to somewhat bitter

Microscopy

Spores ellipsoid, smooth, thick-walled, 11–16(–19) × 6–9(–10) µm, with a conspicuous germ pore; basidia clavate, 4-sterigmate; cheilocystidia and pleurocystidia broadly utriform to clavate

Overview

Pale grassland fieldcap with a frequently cracked cap and fringed veil remnants

1978). Sydowia 30(1-6): 197 (’1977′).

Field encounters

12/Jul/2026, 8:16 AM

Tivoli elurajoon, Tallinn, Harju, Eesti

Urban buildings near coastline, Oaks park, calcareous roadside verge, in mawned lawn

59°26'31.8"N 24°47'01.2"E

🌡️ 21°C 🌤️ Passing clouds 💨 Wind 40° NE->SW, 9 km/h

Original Instagram post

Source hashtags

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