Extract from Wikipedia article: Flammulaster erinaceellus is a species of fungus in the agaric family Tubariaceae. It was first described in 1876 as Agaricus detersibilis by Charles Horton Peck. Roy Watling transferred it to Flammulaster in 1967. The fruit body has a hemispherical to convex cap 1–2.5 cm (0.4–1.0 in) in diameter that is covered with small, erect, brownish scales that can be readily rubbed off. The gills have an adnexed attachment to the stipe. The stipe is up to 2.5 cm (1.0 in) long and 2 mm thick. It is either hollow, or stuffed with a pith-like mycelium. The spores measure 7.5–9 by 4–5 µm. Fruiting occurs on logs in the woods.
Hedgehog scalycap mushrooms (Flammulaster erinaceellus) on a rotting pine log on Chinquapin Trail in Huntsville State Park. Texas, November 21, 2018 Huntsville, TX 77340, USA
Group of hedgehog scalycap mushrooms (Flammulaster erinaceellus) on a rotting pine log on Chinquapin Trail in Huntsville State Park. Texas, November 21, 2018 Huntsville, TX 77340, USA
Young hedgehog scalycap mushrooms (Flammulaster erinaceellus) on a rotting pine log on Chinquapin Trail in Huntsville State Park. Texas, November 21, 2018 Huntsville, TX 77340, USA
Close up of powder-scale Pholiota mushrooms (Flammulaster erinaceellus) on a rotting pine log on Chinquapin Trail in Huntsville State Park. Texas, November 21, 2018 Huntsville, TX 77340, USA
Powder-scale Pholiota mushrooms (Flammulaster erinaceellus) on a large fallen oak where a big branch is broken, on completely rotten brown wood on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 21, 2021 Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Side view of powder-scale Pholiota mushrooms (Flammulaster erinaceellus) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 21, 2021 Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Side view of powder-scale Pholiota mushrooms (Flammulaster erinaceellus) on completely rotten brown wood on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 21, 2021 Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Underside of powder-scale Pholiota mushrooms (Flammulaster erinaceellus) on a large fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 21, 2021 Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Mushrooms Flammulaster erinaceellus on a large rotting oak log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, November 28, 2021 Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Mushrooms Flammulaster erinaceellus on rotting oak wood on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, November 28, 2021 Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Flammulaster erinaceellus mushroom on a fallen tree in Little Thicket Nature Sanctuary. Cleveland, Texas, April 22, 2023 San Jacinto County, Texas, United States
Underside of Flammulaster erinaceellus mushroom on a fallen tree in Little Thicket Nature Sanctuary. Cleveland, Texas, April 22, 2023 San Jacinto County, Texas, United States
Spores from a mushroom Flammulaster erinaceellus collected in Little Thicket Nature Sanctuary a day before. Texas, April 23, 2023