Synonym: Stereum ochroleucum.
Common name: yellowing curtain crust.
Stereum subtomentosum is a crust-like fungus that grows on dead wood, typically on deciduous trees. In East and Central Texas, it is commonly found on oak, elm, and willow species. The fruiting body is 2-5 cm wide, with a velvety to woolly texture, and a yellow-brown to golden-brown color. It has a wavy to lobed margin and a smooth to wrinkled underside. The fungus grows solitary or in small groups, often on fallen logs or stumps, and can be found year-round, but is most abundant from spring to fall.
Yellowing curtain crust mushrooms (Stereum subtomentosum) on a fallen oak in Hensel Park. College Station, Texas, January 16, 2020
Yellowing curtain crust mushrooms (Stereum subtomentosum)(?) on a rotting oak in Hensel Park. College Station, Texas, January 16, 2020
Yellowing curtain crust mushrooms (Stereum subtomentosum)(?) with green algae on a rotting oak in Hensel Park. College Station, Texas, January 16, 2020
Yellowing curtain crust mushrooms (Stereum subtomentosum)(?) among oak leaves in Hensel Park. College Station, Texas, January 16, 2020
Crust mushrooms (Stereum subtomentosum)(?) on a log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, May 8, 2020
Pattern of crust mushrooms (Stereum subtomentosum)(?) on a log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, May 8, 2020
Close-up of crust mushrooms (Stereum subtomentosum)(?) on a log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, May 8, 2020
Yellowing curtain crust mushrooms (Stereum subtomentosum) on a log in Lick Creek Park. College Station, Texas, May 27, 2020
Yellowing curtain crust mushrooms (Stereum subtomentosum) on a fallen elm on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 11, 2020
Yellowing curtain crust fungus (Stereum subtomentosum) on a fallen oak in Lick Creek Park. College Station, Texas, September 23, 2020
Yellowing curtain crust mushrooms (Stereum subtomentosum) on a fallen oak near a creek on North Wilderness Loop Trail in Sam Houston National Forest near Richards. Texas, December 27, 2020
Overlapping crust mushrooms Stereum subtomentosum on a fallen oak near a creek on North Wilderness Loop Trail in Sam Houston National Forest near Richards. Texas, December 27, 2020
Pattern of yellowing curtain crust mushrooms (Stereum subtomentosum) on a fallen oak near a creek on North Wilderness Loop Trail in Sam Houston National Forest near Richards. Texas, December 27, 2020
Spores of corticioid fungus Stereum subtomentosum collected 2 days before in Lick Creek Park. College Station, Texas, November 3, 2022
Yellowing curtain crust mushrooms (Stereum subtomentosum) on a fallen oak on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 2, 2023
Yellowing curtain crust mushrooms (Stereum subtomentosum(?)) on a fallen oak on Yaupon Loop Trail in Lick Creek Park. College Station, Texas, May 14, 2024Multiple observations of the fungus Stereum subtomentosum were recorded in East and Central Texas between 2020 and 2024. The fungus was found growing on various substrates, including fallen oaks, rotting oak logs, and elm trees, in locations such as Hensel Park, Sam Houston National Forest, Lick Creek Park, and along trails like Caney Creek Trail and North Wilderness Loop Trail. Observations noted the presence of yellowing curtain crust mushrooms, often with green algae, and documented their patterns and close-up details. Spores of the fungus were also collected in Lick Creek Park. The observations spanned different seasons, from January to December, indicating that Stereum subtomentosum can be found throughout the year in this region. Some observations noted overlapping crust mushrooms, suggesting a thriving presence of the species in these areas.
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