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Rhizopogon luteolus · gelsvasis šakniagrybis

EN · yellow false truffle DE · Gelbbräunliche Wurzeltrüffel LT · gelsvasis šakniagrybis LV · iedzeltenais jumjupūpēdis PL · piestrówka żółtawa, piestrówka żółta

https://www.first-nature.com/fungi/rhizopogon-luteolus.php Rhizopogon luteolus occurs throughout most of mainland Europe, but it is common only in sandy pine-forested parts of northern Europe. Yellow False Truffles are also quite common in Australia, where these mycorrhizal fungi were introduced early in the 20th century to improve productivity of pine forests there.

Looking very much like a potato and just as variable in size and shape, the Yellow False Truffle is typically 1.5 to 4.5 cm across its largest dimension and can be ovoid, ellipsoidal, an oblate spheroid or a lobed blob. There is no stem, but cord-like mycelial threads spread into the soil and to tree rootlets from a central point under the fruitbody. Its outer skin is tougher than the interior tissue, and it is off-white initially but soon turns ochre and eventually olive brown. The outer surface, which usually cracks irregularly as the fruitbody expands, is often randomly decorated with tawny mycelial strands that give it a slightly woolly appearance.

Rhizopogon luteolus is of disputed edibility.

Vaisiakūnis pailgas, maždaug graikiško riešuto dydžio. Iš žemės matosi tik viršutinė grybo dalis. Viršutinis sluoksnis rudai gelsvas, kai jaunas rausvai rudas, kai pasensta – patamsėja. Apatinė vaisiakūnio dalis apsivijusi plonais rudais hifais. Visas vaisiakūnio paviršius išvagotas smulkiu netaisyklingu piešiniu. Trama pilka. Auga vasarą – rudenį pušų jaunuolynuose, smėlėtame dirvožemyje. Grybas valgomas, bet neskanus.