Synonyms: Chamaeceras tenerrimus, Marasmius tenerrimus.
Russian names: Negniiuchnik nezhneyshiy, Negniiuchnik Vetshteyna.
Marasmius wettsteinii is a small, rare agaric fungus. In St. Petersburg and Leningrad Oblast, it typically grows on moss-covered tree trunks, stumps, and fallen branches, often in shaded, humid areas. It has been found in forests of north-western Russia, particularly in coniferous and mixed woodlands, where it fruits from July to September. The fungus is characterized by its tiny size, bell-shaped cap, and long, slender stem.
Marasmius wettsteinii was observed growing on fallen spruce needles in Alexander Park, Pushkin, a suburb of Saint Petersburg, on July 31, 2016. The fungus was found to thrive in this specific environment, suggesting a preference for coniferous substrates. Further observations in Leningrad Oblast and north-western Russia revealed that Marasmius wettsteinii is widespread in the region, often fruiting in large numbers on spruce needles and other coniferous debris. The species appears to play a significant role in decomposing organic matter in these ecosystems, contributing to nutrient cycling and forest health. The observations highlight the importance of continued study of fungal ecology in this region to better understand the complex relationships between fungi, plants, and their environments. Additional research is needed to fully elucidate the habits and habitat preferences of Marasmius wettsteinii in north-western Russia.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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