03/Sep/2026, 7:06 PM
Soodla forest, Anija, Harju, Eesti
Mixed (conifer dominant) forest track, in sandy lichenized mossy soil
59°23'14.7"N 25°23'38.1"E
🌡️ 16°C ☁️ Overcast 💨 Wind 240° WSW->ENE, 20 km/h
Original Instagram postRhizopogon luteolus
Yellow False Truffle
- Scientific identification
- Rhizopogon luteolus Fr.
- Family
- Rhizopogonaceae
- Class
- Agaricomycetes
- Genus
- Rhizopogon
Names across languages
- English: Yellow False Truffle
- German: Gelbbräunliche Wurzeltrüffel
- Finnish: Keltajänönmukula
- Estonian: Kollakas juurepähkel
- Russian: Ризопогон желтоватый
The scientific profile
From the latest record: 2026-09-03.
Hymenium
Enclosed within a chambered, labyrinthine gleba; basidia line the internal cavities
Fruit body
Subglobose, ellipsoid to irregularly potato-shaped, hypogeous to partly emerging; whitish when young, becoming honey-yellow, ochre to olive-brown; surface fibrillose to rugose
Peridium
Thick, tough and leathery, initially whitish, becoming yellow-brown to ochraceous; drying very hard
Stipe
Absent; attached to substrate by numerous branching rhizomorphs
Description
Spore mass creamy-white to yellowish; gleba becoming olive-yellow to olive-brown at maturity
Ecology
Mycorrhizal with pines; sandy, acidic pine forests and plantations, often beside tracks; solitary or in small groups; late summer to autumn
Edibility
Poor culinary value
Dimensions
Fruit body small to medium, ∅ ~1.5–5(–6) cm
Flesh
Gleba white and soft when young, firmer and powdery with maturity; no characteristic reddening
Chemical reactions
FeSO₄ slightly olive on surface; KOH negative
Odour
Mild when young, becoming unpleasant to garlicky with age
Taste
Mild, indistinct
Microscopy
Spores narrowly ellipsoid to oblong, smooth, hyaline becoming pale olive-brown, ~5.5–9 × 2.5–3.5 µm, often biguttulate; basidia lageniform, usually 4–6-spored; clamp connections absent
Overview
Yellow-brown pine false truffle with dense rhizomorphs and olive chambered gleba
1817). In Fries & Nordholm, Symb. Gasteromyc. (Lund) 1: 5.
Field encounters
Source hashtags
#rhizopogonluteolus #mushroomphotos #fungimacro #falsetruffle #naturephotography
Back to the collection · Photography and field notes by @fungarium.info