Synonyms: Agaricus rotula, Androsaceus rotula, Chamaeceras rotula, Merulius collariatus, Micromphale collariatum.
Common names: collared parachute, Pinwheel Marasmius.
Extract from Wikipedia article: Marasmius rotula is a common species of agaric fungus in the family Marasmiaceae. Widespread in the Northern Hemisphere, it is commonly known variously as the pinwheel mushroom, the pinwheel marasmius, the little wheel, the collared parachute, or the horse hair fungus. The type species of the genus Marasmius, M. rotula was first described scientifically in 1772 by mycologist Giovanni Antonio Scopoli and assigned its current name in 1838 by Elias Fries.
Asturian: Marasmius retula, Dutch: Wieltje (paddenstoel), Finnish: Oksaratasnahikas, French: Marasme petite roue, German: Halsband-Schwindling, Hungarian: Nyakörves szegfűgomba, Lithuanian: Apykaklinis mažūnis, Polish: Twardzioszek obrożowy, Russian: Негниючник колёсовидный, Swedish: Hjulbrosking.
Marasmius rotula is a small to medium-sized fungus with a bell-shaped to convex cap that ranges in color from white to light brown. It has a slender stem and gills that are narrowly attached to the stem. In East and Central Texas, Marasmius rotula typically fruits in late spring to early fall, often growing in clusters on decaying wood, especially hardwoods like oak and elm. The fungus is commonly found in wooded areas, including forests and urban landscapes, where it plays a role in decomposing organic matter.
Collared parachute mushrooms (Marasmius rotula) on rotten wood in Bee Creek Park. College Station, Texas, November 1, 2017
Anderson St, College Station, TX 77840, USA
Close up of collared parachute mushrooms (Marasmius rotula) on rotten wood in Bee Creek Park. College Station, Texas, November 1, 2017Anderson St, College Station, TX 77840, USA
Collared parachute mushrooms (Marasmius rotula) on a fallen tree branch in Lick Creek Park. College Station, Texas, May 28, 2018Raccoon Run, College Station, TX 77845, USA
Close up of collared parachute mushrooms (Marasmius rotula) in Lick Creek Park. College Station, Texas, May 28, 2018Raccoon Run, College Station, TX 77845, USA
Pinwheel mushrooms (Marasmius rotula) in Lick Creek Park. College Station, Texas, September 21, 2018Yaupon Loop, College Station, TX 77845, USA
Pinwheel mushrooms (Marasmius rotula) on rotting wood in Lick Creek Park. College Station, Texas, September 21, 2018Yaupon Loop, College Station, TX 77845, USA
Pinwheel mushrooms (Marasmius rotula) on rotting wood on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, July 13, 2019Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Pinwheel mushrooms (Marasmius rotula) on pieces of wood on Kiwanis Nature Trail. College Station, Texas, April 29, 20201200 Ashburn Ave, College Station, TX 77840, USA
Gills of pinwheel mushrooms (Marasmius rotula) on Kiwanis Nature Trail. College Station, Texas, April 29, 20201200 Ashburn Ave, College Station, TX 77840, USA
Top view of collared parachute mushrooms (Marasmius rotula) on rotting oak in Lick Creek Park. College Station, Texas, May 13, 2024Deer Run Trail, College Station, Brazos County, Texas, United States
Collared parachute mushrooms (Marasmius rotula) on rotting oak wood in Lick Creek Park. College Station, Texas, May 13, 2024Deer Run Trail, College Station, Brazos County, Texas, United States
Spores of collared parachute mushrooms (Marasmius rotula) from a rotting oak, collected in Lick Creek Park. College Station, Texas, May 13, 2024In East and Central Texas, Marasmius rotula was observed growing on rotten wood in various locations, including Bee Creek Park, Lick Creek Park, Sam Houston National Forest, and Kiwanis Nature Trail. The fungus was found on fallen tree branches, rotting wood, and oak wood from 2017 to 2024. Observations included close-up views of the mushrooms, as well as top views and images of their gills and spores. The mushrooms were often referred to as "collared parachute mushrooms" or "pinwheel mushrooms" due to their distinctive appearance. They were typically found in spring and fall, with observations recorded in May, July, September, November, and April. The fungus appears to thrive in wooded areas with abundant rotting wood, suggesting a preference for humid, shaded environments. Multiple observations over several years indicate that Marasmius rotula is a common species in the region.
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