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Fungi: Basidiomycota: Agaricomycetes: Agaricales: Psathyrellaceae: Homophron spadiceum (P. Kumm.) Örstadius & E. Larss., 2015

Homophron spadiceum – Chestnut brittlestem

Synonyms: Agaricus compactus, Agaricus fuscescens, Agaricus hygrophilus, Agaricus sarcocephalus, Agaricus spadiceus, Drosophila sarcocephala, Drosophila spadicea, Pilosace spadiceus, Pratella spadicea, Psathyra sarcocephala, Psathyra spadicea, Psathyrella sarcocephala, Psathyrella spadicea, Psilocybe sarcocephala, Psilocybe spadicea.

Common name: chestnut brittlestem.

Russian name: Psatirella kashtanovaya.

AI-generated description

Homophron spadiceum is a species of fungus that belongs to the family Psathyrellaceae. It is characterized by its small to medium-sized fruiting bodies with a bell-shaped to convex cap that ranges in color from reddish-brown to dark brown, and a slender stem. In St. Petersburg, Leningrad Oblast, and north-western Russia, Homophron spadiceum typically grows on rich soil, often in association with deciduous trees, particularly birch and aspen. It fruits from late summer to early autumn, forming scattered or small groups of mushrooms. The species is considered rare in the region, but can be found in certain areas with suitable habitat.

Photos of this mushroom from the area of St. Petersburg, Russia

Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>, Psathyrella spadicea) on a tree stump in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, <A HREF="../date-en/2016-09-24.htm">September 24, 2016</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum, Psathyrella spadicea) on a tree stump in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, September 24, 2016
Location on mapsnab. Reki Karpovki, Sankt-Peterburg, Russia
Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>, Psathyrella spadicea) in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, <A HREF="../date-en/2016-10-11.htm">October 11, 2016</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum, Psathyrella spadicea) in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, October 11, 2016
Location on mapsKrasnaya al., Lomonosov, g. Sankt-Peterburg, Russia, 198412
Cluster of chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>, Psathyrella spadicea) in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, <A HREF="../date-en/2016-10-11.htm">October 11, 2016</A>
LinkCluster of chestnut brittlestem mushrooms (Homophron spadiceum, Psathyrella spadicea) in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, October 11, 2016
Location on mapsKrasnaya al., Lomonosov, g. Sankt-Peterburg, Russia, 198412
Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>, Psathyrella spadicea) on a base of a tree in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, <A HREF="../date-en/2016-10-11.htm">October 11, 2016</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum, Psathyrella spadicea) on a base of a tree in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, October 11, 2016
Location on mapsKrasnaya al., Lomonosov, g. Sankt-Peterburg, Russia, 198412
Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>, Psathyrella spadicea) on a tree stump in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, <A HREF="../date-en/2016-10-20.htm">October 20, 2016</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum, Psathyrella spadicea) on a tree stump in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, October 20, 2016
Location on mapsAptekarskaya nab., 6, Sankt-Peterburg, Russia, 197022
Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>)(?) near Dibuny, north-west from Saint Petersburg. Russia, <A HREF="../date-en/2017-07-15.htm">July 15, 2017</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum)(?) near Dibuny, north-west from Saint Petersburg. Russia, July 15, 2017
Location on mapsUnnamed Road, Sankt-Peterburg, Russia, 197758
Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>) on a mossy stump near Dibuny, north-west from Saint Petersburg. Russia, <A HREF="../date-en/2017-08-20.htm">August 20, 2017</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum) on a mossy stump near Dibuny, north-west from Saint Petersburg. Russia, August 20, 2017
Location on mapsUnnamed Road, Sankt-Peterburg, Russia, 197758
Fairy inkcap (Coprinellus disseminatus) mushrooms together with chestnut brittlestem (<B>Homophron spadiceum</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-09-23.htm">September 23, 2017</A>
LinkFairy inkcap (Coprinellus disseminatus) mushrooms together with chestnut brittlestem (Homophron spadiceum) in Sosnovka Park. Saint Petersburg, Russia, September 23, 2017
Location on mapsUnnamed Road, Sankt-Peterburg, Russia
Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>) near Kuzmolovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-24.htm">September 24, 2017</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum) near Kuzmolovo, north from Saint Petersburg. Russia, September 24, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia, 188663
Cluster of chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>) near Kuzmolovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-24.htm">September 24, 2017</A>
LinkCluster of chestnut brittlestem mushrooms (Homophron spadiceum) near Kuzmolovo, north from Saint Petersburg. Russia, September 24, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia, 188663
Group of chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>) at the base of a tree near Kuzmolovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2017-09-24.htm">September 24, 2017</A>
LinkGroup of chestnut brittlestem mushrooms (Homophron spadiceum) at the base of a tree near Kuzmolovo, north from Saint Petersburg. Russia, September 24, 2017
Location on mapsUnnamed Road, Leningradskaya oblast', Russia, 188663
Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>) on a peninsula of 4-th South Pond on Elagin Island. Saint Petersburg, Russia, <A HREF="../date-en/2017-10-07.htm">October 7, 2017</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum) on a peninsula of 4-th South Pond on Elagin Island. Saint Petersburg, Russia, October 7, 2017
Location on mapsNaberezhnaya Martynova, 74М, Sankt-Peterburg, Russia, 197110
Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>) near 4-th South Pond on Elagin Island. Saint Petersburg, Russia, <A HREF="../date-en/2017-10-07.htm">October 7, 2017</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum) near 4-th South Pond on Elagin Island. Saint Petersburg, Russia, October 7, 2017
Location on mapsNaberezhnaya Martynova, 70-74, Sankt-Peterburg, Russia, 197110
Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>, Psathyrella spadicea)(?) near Lembolovo, north from Saint Petersburg. Russia, <A HREF="../date-en/2018-08-24.htm">August 24, 2018</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum, Psathyrella spadicea)(?) near Lembolovo, north from Saint Petersburg. Russia, August 24, 2018
Location on mapsUnnamed Road, Leningradskaya oblast', Russia, 188695
Chestnut brittlestem mushrooms (<B>Homophron spadiceum</B>, Psathyrella spadicea)(?) near Dibuny, north-west from Saint Petersburg, Russia, <A HREF="../date-en/2018-09-03.htm">September 3, 2018</A>
LinkChestnut brittlestem mushrooms (Homophron spadiceum, Psathyrella spadicea)(?) near Dibuny, north-west from Saint Petersburg, Russia, September 3, 2018
Location on mapsLeninskaya Tropa, Sankt-Peterburg, Russia, 197758

AI-generated summary of observations

Chestnut brittlestem mushrooms (Homophron spadiceum) were observed in various locations in Leningrad Oblast and north-western Russia. They were found on tree stumps, bases of trees, and mossy stumps in Botanic Gardens, Lomonosov, Sosnovka Park, and other areas near Saint Petersburg. The mushrooms grew singly or in clusters, often with other species like fairy inkcap (Coprinellus disseminatus). Observations were made from July to October, with multiple sightings in September and October. Locations included Elagin Island, Kuzmolovo, Lembolovo, and Dibuny, all within a reasonable distance from Saint Petersburg. The mushrooms seemed to thrive in these environments, with repeated observations in the same areas over several years, from 2016 to 2018.

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Links

Acknowledgements

Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.

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