21/Sep/25, 1:34 PM
Kõrveküla, Lääne-Viru, Eesti
Forest open patch with grass and herbs, in mossy sandy soil, with buried remains of wood litter
59°14'07.2"N 25°39'16.2"E
🌡️ 21°C 🌤️ Passing clouds. Wind 220° SW->NE, 19 km/h
Original Instagram postArrhenia acerosa
moss oysterling
- Scientific identification
- Arrhenia acerosa (Fr.) Kühner
- Family
- Hygrophoraceae
- Class
- Agaricomycetes
- Genus
- Arrhenia
Names across languages
- English: moss oysterling
- German: Grauer Zwergnabeling
- Finnish: Törmävinokasryhmä
- Estonian: Agana-samblalehik
- Russian: Аррения мякинная
The scientific profile
From the latest record: 2025-09-21.
Hymenium
Gills, arising from cap margin, moderate spacing, slightly darker than cap surface.
Cap
Fan- or kidney-shaped, thin and sessile; smooth surface, medium grey-brown, margin incurved when young, later lobed; base attached by a fuzzy tomentum.
Hymenium Attachment
Adnate to decurrent
Stipe
Lateral, short, pale brown
Spore print
Spore print white
Ecology
Saprobic and bryophilous, growing on dead wood fragments, on mossy soil among twigs and debris along forest paths
Edibility
Edibility too small and insubstantial
Fruit body
Fruit body small, up to ~15 mm across
Dimensions
Cap ~up to 15 mm in diameter
Chemical reactions
No significant color reactions
Odour
Indistinct
Taste
Indistinct
Microscopy
Spores narrowly elliptical to lacrymoid, smooth, hyaline, average ~7.4×3.8µm, basidia 4-spored, 21–25×6–7µm, cystidia absent, clamps present
Overview
Tiny, grey-brown oysterling growing on wood debris or mossy soil among forest litter
1980). Bull. Mens. Soc. Linn. Lyon 49(Num. Spéc.): 893.
Field encounters
Source hashtags
#hongos #arrheniaacerosa #arrhenia #mossoysterling #samblalehik #oysterling #törmävinokasryhmä #grauerzwergnabeling #zwergnabeling #mushroomphoto #fungiphoto #fungimacro #naturephotography #seenefotod #pilzefotografieren #фотогрибов #sieniäkuvia #houby #mycology #fungistudy #mushroom #fungi #bryophilousfungi #hygrophoraceae #seened #pilze
Back to the collection · Photography and field notes by @fungarium.info