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Fungi: Basidiomycota: Agaricomycetes: Agaricales: Mycenaceae: Mycena acicula (Schaeff.) P. Kumm., 1871

Mycena acicula – Orange bonnet

Synonyms: Agaricus acicula, Agaricus miniatus, Hemimycena acicula, Marasmiellus acicula, Trogia acicula.

Common name: orange bonnet.

Russian names: Mitsena iglovidnaya, Mitsena igolka.

Extract from Wikipedia article: Mycena acicula, commonly known as the orange bonnet, or the coral spring Mycena, is a species of fungus in the Mycenaceae family. It is found in Asia, the Caribbean, North America and Europe. The fruit bodies, or mushrooms, of the fungus grow on dead twigs and other woody debris of forest floors, especially along streams and other wet places. They have small orange-red caps, up to 1 cm (0.4 in) in diameter, held by slender yellowish stems up to 6 cm (2.4 in) long. The gills are pale yellow with a whitish edge. Several other Mycena species look similar, but may be distinguished by differences in size and/or microscopic characteristics. M. acicula is considered inedible because of its small size.

AI-generated description

Mycena acicula is a small, delicate mushroom with a bell-shaped cap, typically 0.5-2 cm in diameter, and a slender stem, often found growing on moss, litter, or decaying wood. In St. Petersburg, Leningrad Oblast, and north-western Russia, it fruits from July to October, preferring humid, shaded areas with rich organic matter. It has been recorded in various habitats, including forests, parks, and wetlands, often in association with coniferous trees such as spruce and fir.

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

Orange bonnet mushrooms (<B>Mycena acicula</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-06-30.htm">June 30, 2017</A>
LinkOrange bonnet mushrooms (Mycena acicula) in Sosnovka Park. Saint Petersburg, Russia, June 30, 2017
Location on mapsSevernyy pr., 32А, Sankt-Peterburg, Russia, 194291
Close up of orange bonnet mushrooms (<B>Mycena acicula</B>) in Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-06-30.htm">June 30, 2017</A>
LinkClose up of orange bonnet mushrooms (Mycena acicula) in Sosnovka Park. Saint Petersburg, Russia, June 30, 2017
Location on mapsSevernyy pr., 32А, Sankt-Peterburg, Russia, 194291
Orange bonnet mushrooms (<B>Mycena acicula</B>) taken from Sosnovka Park. Saint Petersburg, Russia, <A HREF="../date-en/2017-06-30.htm">June 30, 2017</A>
LinkOrange bonnet mushrooms (Mycena acicula) taken from Sosnovka Park. Saint Petersburg, Russia, June 30, 2017
Orange bonnet mushrooms (<B>Mycena acicula</B>) under a large tree in Gardens of Polytechnic Institute. Saint Petersburg, Russia, <A HREF="../date-en/2017-07-29.htm">July 29, 2017</A>
LinkOrange bonnet mushrooms (Mycena acicula) under a large tree in Gardens of Polytechnic Institute. Saint Petersburg, Russia, July 29, 2017
Location on mapsPamyatnik Politekhnikam, Sankt-Peterburg, Russia, 195251
Close up of orange bonnet mushrooms (<B>Mycena acicula</B>) under a large tree in Gardens of Polytechnic Institute. Saint Petersburg, Russia, <A HREF="../date-en/2017-07-29.htm">July 29, 2017</A>
LinkClose up of orange bonnet mushrooms (Mycena acicula) under a large tree in Gardens of Polytechnic Institute. Saint Petersburg, Russia, July 29, 2017
Location on mapsPolitekhnicheskaya ul., 29, Sankt-Peterburg, Russia, 195251
Close up of orange bonnet mushrooms (<B>Mycena acicula</B>) taken from a mossy lawn in Gardens of Polytechnic Institute. Saint Petersburg, Russia, <A HREF="../date-en/2017-07-29.htm">July 29, 2017</A>
LinkClose up of orange bonnet mushrooms (Mycena acicula) taken from a mossy lawn in Gardens of Polytechnic Institute. Saint Petersburg, Russia, July 29, 2017
Location on mapsPamyatnik Politekhnikam, Sankt-Peterburg, Russia, 195251
Orange bonnet mushrooms (<B>Mycena acicula</B>) taken from Gardens of Polytechnic Institute. Saint Petersburg, Russia, <A HREF="../date-en/2017-07-29.htm">July 29, 2017</A>
LinkOrange bonnet mushrooms (Mycena acicula) taken from Gardens of Polytechnic Institute. Saint Petersburg, Russia, July 29, 2017

AI-generated summary of observations

In Leningrad Oblast and north-western Russia, observations of Mycena acicula have been made in various locations. The fungus has been found in Sosnovka Park, Saint Petersburg, where it grows on the ground, typically in clusters. Close-up observations reveal the mushroom's distinctive orange cap and slender stem. Similar findings were made in the Gardens of Polytechnic Institute, also in Saint Petersburg, where the fungus was found growing under a large tree and on a mossy lawn. The mushrooms were observed to be small, with bright orange caps, and were often found in groups. These observations suggest that Mycena acicula is common in urban parks and gardens in the region, and can thrive in a variety of environments, including wooded areas and grassy lawns. The fungus appears to prefer shady, moist conditions, and can be found growing in close proximity to trees and other vegetation.

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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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