Birch polypore mushroom with a mold like ochre cushion fungus (Trichoderma pulvinatum) in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017
ul. Zhaka Dyuklo, 67, Sankt-Peterburg, Russia, 194214Synonyms: Hypocrea citrina, Hypocrea fungicola, Hypocrea pulvinata.
Common name: ochre cushion.
Russian name: Gipokreya podushkovidnaya.
Trichoderma pulvinatum is a species of fungus that belongs to the family Hypocreaceae. It has been found in St. Petersburg, Leningrad Oblast, and other areas of north-western Russia, where it typically inhabits soil, decaying wood, and other organic substrates. The fungus is characterized by its greenish-blue conidia and pulvinate conidial masses, and is known to be a saprotroph, obtaining its nutrients from dead or decaying plant material. In the region, it has been isolated from various habitats, including forests, grasslands, and urban areas, with optimal growth occurring in temperate climates with moderate temperatures and humidity.
Birch polypore mushroom with a mold like ochre cushion fungus (Trichoderma pulvinatum) in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017ul. Zhaka Dyuklo, 67, Sankt-Peterburg, Russia, 194214
Ochre cushion fungus (Trichoderma pulvinatum) on a birch polypore mushroom in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017ul. Zhaka Dyuklo, 67, Sankt-Peterburg, Russia, 194214
Trichoderma pulvinatum (Hypocrea pulvinata) fungus growing on a cut cap of red-belted bracket polypore mushroom in Sosnovka Park. Saint Petersburg, Russia, June 25, 2017Svetlanovskiy pr., 51, Sankt-Peterburg, Russia, 194064
Trichoderma pulvinatum (Hypocrea pulvinata) fungus on red-belted bracket polypore mushroom in Sosnovka Park. Saint Petersburg, Russia, June 25, 2017Svetlanovskiy pr., 53, Sankt-Peterburg, Russia, 194064
Close up of Trichoderma pulvinatum (Hypocrea pulvinata) fungus on red-belted bracket polypore mushroom in Sosnovka Park. Saint Petersburg, Russia, June 25, 2017Svetlanovskiy pr., 53, Sankt-Peterburg, Russia, 194064
Details of Trichoderma pulvinatum (Hypocrea pulvinata) fungus on red-belted bracket polypore mushroom in Sosnovka Park. Saint Petersburg, Russia, June 25, 2017Svetlanovskiy pr., 53, Sankt-Peterburg, Russia, 194064
Close up of Trichoderma pulvinatum (Hypocrea pulvinata) fungus growing on a cut cap of red-belted bracket polypore mushroom near Dibuny, west from Saint Petersburg. Russia, June 27, 2017Unnamed Road, Pesochnyy, Sankt-Peterburg, Russia
Trichoderma pulvinatum (Hypocrea pulvinata) fungus growing on a cut cap of red-belted bracket polypore mushroom near Dibuny, west from Saint Petersburg. Russia, June 27, 2017Unnamed Road, Pesochnyy, Sankt-Peterburg, Russia
Trichoderma pulvinatum (Hypocrea pulvinata) fungus growing on a cut cap of red-belted bracket polypore mushroom in Sosnovka Park. Saint Petersburg, Russia, June 29, 2017Unnamed Road, Sankt-Peterburg, RussiaTrichoderma pulvinatum was observed growing on birch polypore mushrooms and red-belted bracket polypore mushrooms in Sosnovka Park, Saint Petersburg, Russia, on multiple occasions between March and June 2017. The fungus formed mold-like ochre cushions on the surface of the host mushrooms. Similar observations were made near Dibuny, west of Saint Petersburg, on June 27, 2017. Close-up examinations revealed detailed structures of the Trichoderma pulvinatum fungus growing on the cut caps of red-belted bracket polypore mushrooms. The fungus was also identified as Hypocrea pulvinata in some observations. These findings suggest that Trichoderma pulvinatum is present in the region and can be found growing on specific species of polypore mushrooms. The observations were made during spring and early summer, indicating a possible seasonal pattern of growth for the fungus.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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