Inonotus quercustris is a species of bracket fungus that grows on oak trees. It has a semicircular to fan-shaped cap, 2-8 cm wide, with a reddish-brown to dark brown upper surface and a yellowish to brownish pore surface. The flesh is tough and fibrous. In East and Central Texas, it typically fruits in late summer to early fall on live oak and other Quercus species, often causing heart rot and decay. It can be found on trees in urban and natural areas, including parks and woodlands.
Polypore mushroom Inonotus quercustris on a water oak in Lick Creek Park. College Station, Texas, July 18, 2018
Iron Bridge Trail, College Station, TX 77845, USA
Polypore mushroom Inonotus quercustris on a damaged oak in Lick Creek Park. College Station, Texas, July 18, 2018Iron Bridge Trail, College Station, TX 77845, USA
Underside of polypore mushroom Inonotus quercustris in Lick Creek Park. College Station, Texas, July 18, 2018Iron Bridge Trail, College Station, TX 77845, USA
Spongy and water filled texture of polypore mushroom Inonotus quercustris in Lick Creek Park. College Station, Texas, July 18, 2018Iron Bridge Trail, College Station, TX 77845, USA
Young polypore mushroom Inonotus quercustris on a damaged oak in Lick Creek Park. College Station, Texas, August 28, 2020Iron Bridge Trail, College Station, TX 77845, USA
Pore surface of a mature polypore mushroom Inonotus quercustris on a water(?) oak in Lick Creek Park. College Station, Texas, September 2, 2020Iron Bridge Trail, College Station, TX 77845, USA
Polypore mushroom Inonotus quercustris on an oak on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, August 14, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Cap of polypore mushroom Inonotus quercustris on an oak on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, August 14, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Underside of polypore mushroom Inonotus quercustris on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, August 14, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Pore surface of polypore mushroom Inonotus quercustris on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, August 14, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Cross section of polypore mushroom Inonotus quercustris on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, August 14, 2022Lone Star Hiking Trail, Montgomery County, Texas, United States
Tissues under a microscope (x40 objective) of a polypore mushroom Inonotus quercustris collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, August 14, 2022
Spores of a polypore mushroom Inonotus quercustris collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, August 14, 2022Observations of the fungus Inonotus quercustris in East and Central Texas reveal its growth on various oak species, including water oak and damaged oaks. The mushroom's appearance varies, with a spongy and water-filled texture, and a pore surface that can be observed on mature specimens. Young mushrooms have been found on damaged oaks, while mature ones grow on both healthy and damaged trees. The fungus has been spotted in Lick Creek Park, College Station, and Sam Houston National Forest, specifically on the Caney Creek section of Lone Star Hiking Trail. Microscopic examination of tissues and spores has also been conducted, providing further insight into the species' characteristics. The observations span several years, from 2018 to 2022, and demonstrate the presence of Inonotus quercustris in these regions.
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