Synonyms: Agaricus nigripes, Chamaeceras nigripes, Heliomyces nigripes, Marasmiellus nigripes, Marasmius nigripes, Pterospora nigripes.
Common names: blackfoot parachute, Black-footed Marasmius.
Tetrapyrgos nigripes is a species of fungus in the family Marasmiaceae. It has a small to medium-sized cap that is convex to flat, ranging in color from yellowish-brown to dark brown, and a slender stem with a blackish-brown base. In East and Central Texas, Tetrapyrgos nigripes typically fruits in late summer to early fall, often growing in clusters on decaying wood or organic matter in moist environments, such as stream banks and woodland edges.
Small mushrooms Tetrapyrgos nigripes on rotting wood in Lick Creek Park. College Station, Texas, June 21, 2018
Iron Bridge Trail, College Station, TX 77845, USA
Close up of mushrooms Tetrapyrgos nigripes on rotting wood in Lick Creek Park. College Station, Texas, June 21, 2018Iron Bridge Trail, College Station, TX 77845, USA
Masses of small mushrooms Tetrapyrgos nigripes on a fallen tree branch in Lick Creek Park. College Station, Texas, June 21, 2018Raccoon Run, College Station, TX 77845, USA
Small mushrooms Tetrapyrgos nigripes on a fallen tree branch in Lick Creek Park. College Station, Texas, June 21, 2018Raccoon Run, College Station, TX 77845, USA
Mushrooms Tetrapyrgos nigripes on a rotting tree branch in Lick Creek Park. College Station, Texas, June 21, 2018Raccoon Run, College Station, TX 77845, USA
Side view of mushrooms Tetrapyrgos nigripes from a fallen tree branch in Lick Creek Park. College Station, Texas, June 21, 2018Raccoon Run, College Station, TX 77845, USA
Mushrooms Tetrapyrgos nigripes on rotting wood in Lick Creek Park. College Station, Texas, September 11, 2018Raccoon Run, College Station, TX 77845, USA
Small mushrooms Tetrapyrgos nigripes on pieces of wood in Bee Creek Park. College Station, Texas, September 12, 2018Texas Ave, College Station, TX 77840, USA
Blackfoot parachute mushrooms (Tetrapyrgos nigripes) on rotting wood in Lick Creek Park. College Station, Texas, June 2, 2020Raccoon Run, College Station, TX 77845, USA
Blackfoot parachute mushrooms (Tetrapyrgos nigripes) on a fallen twig on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020LSHT Little Lake Creek Loop, Montgomery, TX 77356, USA
Underside of blackfoot parachute mushrooms (Tetrapyrgos nigripes) on a fallen twig on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Close-up of blackfoot parachute mushrooms (Tetrapyrgos nigripes) on a fallen twig on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 26, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Blackfoot parachute mushrooms (Tetrapyrgos nigripes) in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 202223450 Farm-to-Market Road 1155, Washington, Texas 77880, United States
Spores of blackfoot parachute mushrooms (Tetrapyrgos nigripes) (stacked image), collected in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2022
Spores of blackfoot parachute mushrooms (Tetrapyrgos nigripes) collected in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2022Mushrooms of Tetrapyrgos nigripes were observed growing on rotting wood and fallen tree branches in various locations in East and Central Texas. In Lick Creek Park, College Station, they were found in large masses on fallen branches and rotting wood in June and September 2018. Similar observations were made in Bee Creek Park, College Station, in September 2018. In Sam Houston National Forest, they were found on a fallen twig on Caney Creek Trail in September 2020. The mushrooms were also observed in Washington-on-the-Brazos State Historic Site in September 2022, where spores were collected and examined. The observations suggest that Tetrapyrgos nigripes is commonly found in these regions, particularly in areas with abundant rotting wood. The species appears to thrive in a variety of environments, from parks to forests and historic sites.
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