10/Oct/2025, 4:10 PM
Kadrioru park, Tallinn, Harju, Eesti
Urban park, under Tilia sp. trees, on mowed lawn
59°26'22.3"N 24°47'20.6"E
🌡️ 12°C 🌤️ Scattered clouds 💨 Wind 320° NW->SE, 19 km/h
Original Instagram postPaxillus ammoniavirescens
ammonia-green roll-rim
- Scientific identification
- Paxillus ammoniavirescens Contu & Dessì
- Family
- Paxillaceae
- Class
- Agaricomycetes
- Genus
- Paxillus
Names across languages
- English: ammonia-green roll-rim
- German: Ammoniakgrün kremplinge
- Finnish: Ammoniakinvihreäpulkkosienet
- Estonian: Ammoniaak-roheline vahelik
- Russian: Свинушка аммиачно-зелёная
The scientific profile
From the latest record: 2025-10-10.
Hymenium
Gills, decurrent and often forking, initially pale, aging to rusty-brown or vinaceous tones
Cap
Depressed to funnel-shaped, initially velvety or tomentose (especially at margin), later smoother, brownish-vinaceous, margin often inrolled for an extended period
Hymenium Attachment
Decurrent
Stipe
Central, short, stout; color similar to cap (brownish tones), with preserved basal mycelium and rhizomorphs
Spore print
Spore print yellow-olive-brown
Ecology
Ectomycorrhizal with Tilia, Populus, Carpinus, on rich soil in parks, churchyards, open forests, summer to autumn
Edibility
Unknown (Paxillus genus toxicity)
Flesh
Fleshy, not staining
Fruit body
Fruit body medium to large
Chemical reactions
Greenish reaction on the cap when exposed to ammonia (NH₄OH) vapor
Microscopy
Spores ~7–11×5–7 μm
Overview
Rare roll-rim specie notable for its ammonia-green reaction on the cap, decurrent forked gills, and yellow-olive-brown spore print
1999). In Dessì & Contu, Micol. Veg. Medit. 13(2): 123.
Field encounters
Source hashtags
#hongos #paxillusammoniavirescens #paxillus #vahelik #echtekremplinge #kremplinge #pulkkosienet #rollrim #paxillaceae #mushroomphoto #fungiphoto #fungimacro #naturephotography #seenefotod #pilzefotografieren #фотогрибов #sieniäkuvia #houby #mycology #fungistudy #mushroom #fungi #poisonousfungi #boletales #ammoniasoillovingfungi #pilze
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