Bitter bracket fungus (Postia stiptica)(?) in Lisiy Nos, west from Saint Petersburg. Russia, July 2, 2017
Primorskoye sh., 16, Lisiy Nos, Sankt-Peterburg, Russia, 197755Synonyms: Agaricus albidus, Bjerkandera acricula, Bjerkandera colliculosa, Bjerkandera stiptica, Boletus albidus, Boletus radicans, Boletus salicinus, Boletus stipticus, Boletus suaveolens, Daedalea albida, Daedalea salicina, Fomes albidus, Leptoporus albellus, Leptoporus albidus, Leptoporus fodinarum, Leptoporus stipticus, Microporus albidus, Oligoporus stipticus, Polyporus acriculus, Polyporus albidus, Polyporus candidissimus, Polyporus carbonarius, Polyporus dentatus, Polyporus fodinarum, Polyporus foetens, Polyporus fragilis, Polyporus perdurus, Polyporus stipticus, Polystictus albidus, Polystictus stipticus, Spongiporus stipticus, Tyromyces albidus, Tyromyces carbonarius, Tyromyces stipticus.
Common name: bitter bracket.
Russian names: Postiya vyazhushchaya, Oligoporus vyazhushchiy.
Postia stictica is a species of fungus in the family Fomitopsidaceae. It is a brown-rot fungus that grows on coniferous trees, particularly spruce and pine. In St. Petersburg, Leningrad Oblast, and north-western Russia, Postia stictica has been found to be widely distributed, often occurring on dead or dying trees in forests and urban areas. It fruits from summer to autumn, producing effused-reflexed to resupinate basidiocarps with a smooth to tuberculate hymenial surface. The fungus is relatively common in the region, particularly in areas with high humidity and abundant coniferous tree cover.
Bitter bracket fungus (Postia stiptica)(?) in Lisiy Nos, west from Saint Petersburg. Russia, July 2, 2017Primorskoye sh., 16, Lisiy Nos, Sankt-Peterburg, Russia, 197755
Bitter bracket polypore mushroom (Postia stiptica)(?) on a fallen spruce(?) in Lindulovskaya Larch Grove, near Roshchino, 30 miles north-west from Saint Petersburg. Russia, July 31, 2017Lindulovskaya dor., Leningradskaya oblast', Russia
Bitter bracket mushrooms (Postia stiptica)(?) in Posiolok near Vyritsa, 50 miles south from Saint Petersburg. Russia, September 29, 2017Unnamed Road, Vyritsa, Leningradskaya oblast', Russia, 188381
Young bitter bracket mushroom (Postia stiptica) on a cut surface of a spruce stump in Tarkhovka near Sestroretsk. West from Saint Petersburg, Russia, August 18, 2018Unnamed Road, Sankt-Peterburg, Russia, 197701
Dissected young bitter bracket mushroom (Postia stiptica) on a cut surface of a spruce stump in Tarkhovka near Sestroretsk. West from Saint Petersburg, Russia, August 18, 2018Unnamed Road, Sankt-Peterburg, Russia, 197701
Bitter bracket mushroom (Postia stiptica) on a spruce stump in Tarkhovka near Sestroretsk, west from Saint Petersburg. Russia, August 27, 2018Primorskoye Shosse, Sankt-Peterburg, Russia, 197701
Bitter bracket mushroom (Postia stiptica) on a spruce stump in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024Песчаная улица, Тарховка, Сестрорецк, Санкт-Петербург, Северо-Западный федеральный округ, 197706, Россия
Underside of bitter bracket mushroom (Postia stiptica) on a spruce stump in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024Песчаная улица, Тарховка, Сестрорецк, Санкт-Петербург, Северо-Западный федеральный округ, 197706, Россия
Cross section of bitter bracket mushroom (Postia stiptica) on a spruce stump in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024Песчаная улица, Тарховка, Сестрорецк, Санкт-Петербург, Северо-Западный федеральный округ, 197706, Россия
Bitter bracket mushrooms (Postia stiptica) on rotting wood in a dense forest near a summer house at 9a 2nd Borovaya Street in Solnechnoe, west from Saint Petersburg. Russia, August 7, 2024Russia, Saint Petersburg, Солнечное, 197739, 2-Я Боровая Улица 9а
Pores of bitter bracket mushrooms (Postia stiptica) on rotting wood in a dense forest near a summer house at 9a 2nd Borovaya Street in Solnechnoe, west from Saint Petersburg. Russia, August 7, 2024Russia, Saint Petersburg, Солнечное, 197739, 2-Я Боровая Улица 9а
Cross section of bitter bracket mushrooms (Postia stiptica) on rotting wood in a dense forest near a summer house at 9a 2nd Borovaya Street in Solnechnoe, west from Saint Petersburg. Russia, August 7, 2024Russia, Saint Petersburg, Солнечное, 197739, 2-Я Боровая Улица 9аObservations of Postia stiptica were made in various locations in Leningrad Oblast and north-western Russia. The fungus was found on fallen spruce trees, cut surfaces of spruce stumps, and rotting wood in dense forests. Locations included Lisiy Nos, Lindulovskaya Larch Grove, Posiolok, Tarkhovka, and Solnechnoe, all within a 50-mile radius of Saint Petersburg. The fungus was observed on multiple occasions between July 2017 and August 2024, with varying stages of growth, including young and mature specimens. Cross sections and underside observations revealed characteristic pores and structures. The fungus appeared to thrive in areas with abundant spruce trees and decaying wood, suggesting a preference for these substrates. Multiple sightings in the same locations over several years indicate a stable presence of Postia stiptica in the region.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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