Tiny cup fungi Lachnum pygmaeum on tree roots in Sosnovka Park. Saint Petersburg, Russia, July 19, 2017
Unnamed Road, Sankt-Peterburg, RussiaSynonyms: Atractobolus luteolus, Atractobolus pygmaeus, Calycina nuda, Ciboria ochracea, Ciboria pygmaea, Dasyscyphus luteolus, Dasyscyphus pygmaeus, Erinella pygmaea, Helotium hedwigii, Helotium luteolum, Helotium phillipsii, Helotium pygmaeum, Helotium rhizophilum, Helotium tuba, Hymenoscyphus hedwigii, Hymenoscyphus tuba, Hyphoscypha nuda, Lachnella luteola, Lachnella nuda, Lachnella pygmaeum, Lachnum hedwigii, Peziza nuda, Peziza prolifera, Peziza pygmaea, Phialea hedwigii.
Russian name: Lakhnum karlikovyy.
Lachnum pygmaeum is a small, disc-shaped fungus that grows on decaying plant material, particularly mosses and lichens. In St. Petersburg and Leningrad Oblast, it has been found in moist, shaded areas with rich vegetation, such as forests, bogs, and lake shores. In north-western Russia, it is widely distributed, often occurring in association with sphagnum mosses and other acidic plant communities. The fungus typically fruits in late summer to early autumn, producing tiny, yellowish-white apothecia that are 0.5-2 mm in diameter.
Tiny cup fungi Lachnum pygmaeum on tree roots in Sosnovka Park. Saint Petersburg, Russia, July 19, 2017Unnamed Road, Sankt-Peterburg, Russia
Tiny yellow cup fungi Lachnum pygmaeum on a tree root in Sosnovka Park. Saint Petersburg, Russia, July 19, 2017Unnamed Road, Sankt-Peterburg, RussiaObservations of the fungus Lachnum pygmaeum in Leningrad Oblast and north-western Russia reveal its presence on tree roots. In Sosnovka Park, Saint Petersburg, the fungus was found growing on tree roots on July 19, 2017. The tiny cup fungi were observed to be yellow in color, with a small size characteristic of the species. Similar observations were made at another location in the same park, where Lachnum pygmaeum was again found on a tree root, displaying its typical tiny yellow cup-shaped fruiting bodies. These findings suggest that Lachnum pygmaeum is present in the region and can be found in association with tree roots, particularly in areas such as Sosnovka Park. The fungus appears to thrive in this environment, producing small, yellow cups that are indicative of its species.
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