Boletus subfraternus is a species of bolete fungus that typically grows 3-6 cm in cap diameter, with a brown to reddish-brown cap and yellow to olive-yellow pores. The stem is usually slender and colored similarly to the cap. In East and Central Texas, it is often found fruiting singly or in small groups under oak, pine, and other hardwood trees from May to October, particularly in areas with rich soil and abundant leaf litter.
Small Boletus subfraternus(?) mushrooms on a sandy path in Lick Creek Park. College Station, Texas, May 31, 2018
Raccoon Run, College Station, TX 77845, USA
Dissected small Boletus subfraternus(?) mushrooms on a sandy path in Lick Creek Park. College Station, Texas, May 31, 2018Raccoon Run, College Station, TX 77845, USA
Boletus subfraternus mushrooms with Hypomyces fungus on a sandy path on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 2, 2018Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Boletus subfraternus mushrooms on a sandy path on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 2, 2018Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Small mushrooms Boletus subfraternus on the slope of the half-dry creek near Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 9, 2018Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Mushrooms Boletus subfraternus on a slope of the almost dry creek half a meter above its bottom near Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 9, 2018Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Bolete mushrooms Boletus subfraternus and Porphyrellus sordidus on floodplain on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, May 23, 2020LSHT Little Lake Creek Loop, Montgomery, TX 77356, USA
Bolete mushrooms Boletus subfraternus and dissected Porphyrellus sordidus on floodplain on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, May 23, 2020LSHT Little Lake Creek Loop, Montgomery, TX 77356, USA
Bolete mushrooms Boletus subfraternus in a shady forest in Lick Creek Park. College Station, Texas, May 27, 202014802 Rock Prairie Rd, College Station, TX 77845, USA
Bolete mushrooms Boletus subfraternus in muddy area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, July 10, 2020LSHT Little Lake Creek Loop, Montgomery, TX 77356, USA
Boletus subfraternus mushrooms on floodplain on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 11, 2020Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Bolete mushroom Boletus subfraternus on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 19, 2020Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Cross section of a mushroom Boletus subfraternus on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 19, 2020Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Boletus subfraternus(?) mushrooms under oak and elm trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 202023400 Park Rd 12, Washington, TX 77880, USA
Caps of Boletus subfraternus(?) mushrooms under oak and elm trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 202023400 Park Rd 12, Washington, TX 77880, USA
Boletus subfraternus(?) mushrooms under oaks and red cedar trees in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 27, 202023400 Park Rd 12, Washington, TX 77880, USA
Small bolete mushrooms Boletus subfraternus in muddy area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, June 6, 2022Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Bolete mushrooms Boletus subfraternus with Hypomyces fungus in muddy area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, June 6, 2022Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Cross section of small bolete mushrooms Boletus subfraternus in muddy area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, June 6, 2022Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Spores of small orange cap bolete mushrooms Boletus subfraternus (spore print olive-brown) collected in Sam Houston National Forest near Montgomery. Texas, June 6, 2022
Tissues of a small orange cap bolete mushroom Boletus subfraternus infected by Hypomyces fungus collected in Sam Houston National Forest near Montgomery. Texas, June 6, 2022
Tissues and spores of a small orange cap bolete mushroom Boletus subfraternus infected by Hypomyces fungus collected in Sam Houston National Forest near Montgomery. Texas, June 6, 2022
Small orange cap bolete mushroom Boletus subfraternus infected by Hypomyces fungus in Congo Red solution under a microscope, collected in Sam Houston National Forest near Montgomery. Texas, June 6, 2022
Boletus subfraternus mushrooms with Hypomyces fungus on a sandy path on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, August 28, 2022Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Guttation of Boletus subfraternus mushrooms with Hypomyces fungus on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, August 28, 2022Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Mushrooms Boletus subfraternus and Podoscypha petalodes on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, August 28, 2022Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Top view of a small mushroom Boletus subfraternus(?) or may be Xerocomus on Closed Trail, under dense bushes, mostly Yaupon, in Lick Creek Park. College Station, Texas, May 4, 2024Iron Bridge Trail, College Station, Brazos County, Texas, United States
Underside of a small mushroom Boletus subfraternus(?) on Closed Trail in Lick Creek Park. College Station, Texas, May 4, 2024Iron Bridge Trail, College Station, Brazos County, Texas, United States
Cross section of a small mushroom Boletus subfraternus(?) on Closed Trail in Lick Creek Park. College Station, Texas, May 4, 2024Iron Bridge Trail, College Station, Brazos County, Texas, United States
Spores of a small mushroom Boletus subfraternus(?) or may be Xerocomus from Closed Trail, collected in Lick Creek Park. College Station, Texas, May 4, 2024
Mushrooms Boletus subfraternus(?) in wet area on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, August 18, 2024Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United StatesThe fungus Boletus subfraternus was observed multiple times in East and Central Texas between 2018 and 2024. The majority of sightings occurred in Sam Houston National Forest, particularly on Caney Creek Trail, with some also found in Lick Creek Park and Washington-on-the-Brazos State Historic Site. The mushrooms were typically found on sandy paths, floodplains, and in wooded areas, often under oak and elm trees. Some observations noted the presence of Hypomyces fungus infecting the Boletus subfraternus. The mushrooms were observed during various months, including May, June, July, August, and September, suggesting a relatively long fruiting period. The observations provide valuable information on the habitat and distribution of Boletus subfraternus in East and Central Texas.
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