Common name: Reddish-brown Bitter Bolete.
Extract from Wikipedia article: Tylopilus rubrobrunneus, commonly known as the reddish brown bitter bolete, is a bolete fungus in the family Boletaceae. It was first described scientifically in 1967 by Samuel J. Mazzer and Alexander H. Smith from collections made in Michigan. It is found in the United States; the bolete was reported from a Mexican beech (Fagus mexicana) forest in Hidalgo, Mexico in 2010.
Tylopilus rubrobrunneus is a species of bolete fungus that grows in association with oak trees. In East and Central Texas, it typically fruits from June to October, producing medium-sized caps that are reddish-brown to dark brown, often with a wrinkled or reticulate surface. The pores underneath are small and yellowish, becoming olive-brown with age. The stem is stout, cylindrical, and usually the same color as the cap. This fungus can be found in wooded areas, particularly under live oak and red oak, where it grows singly or in small groups on the ground.
Bitter bolete mushrooms (Tylopilus rubrobrunneus) and Golden Threads Lepidella (Amanita canescens) in Lick Creek Park. College Station, Texas, July 2, 2018
Yaupon Loop, College Station, TX 77845, USA
Underside of bitter bolete mushrooms (Tylopilus rubrobrunneus) in Lick Creek Park. College Station, Texas, July 2, 2018Yaupon Loop, College Station, TX 77845, USA
Pair of bitter bolete mushrooms (Tylopilus rubrobrunneus) in Lick Creek Park. College Station, Texas, July 2, 2018Yaupon Loop, College Station, TX 77845, USA
Bitter bolete mushroom Tylopilus rubrobrunneus on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, July 13, 2018Lone Star Hiking Trail, Montgomery, TX 77356, USA
Side view of a bitter bolete mushroom Tylopilus rubrobrunneus on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, July 13, 2018Lone Star Hiking Trail, Montgomery, TX 77356, USA
Cross section of a bitter bolete mushroom Tylopilus rubrobrunneus on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, July 13, 2018Lone Star Hiking Trail, Montgomery, TX 77356, USA
Cap of bitter bolete mushroom Tylopilus rubrobrunneus on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, July 15, 2018Lone Star Hiking Trail, Montgomery, TX 77356, USA
Underside of bitter bolete mushroom Tylopilus rubrobrunneus on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, July 15, 2018Lone Star Hiking Trail, Montgomery, TX 77356, USA
Dissected bitter bolete mushroom Tylopilus rubrobrunneus on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, July 15, 2018Lone Star Hiking Trail, Montgomery, TX 77356, USA
Amanita sect. Validae, Boletus pallidus, and Tylopilus rubrobrunneus mushrooms in Lick Creek Park. College Station, Texas, July 19, 2018Yaupon Loop, College Station, TX 77845, USA
Bitter bolete mushrooms (Tylopilus rubrobrunneus) in Lick Creek Park. College Station, Texas, July 23, 2018Yaupon Loop, College Station, TX 77845, USA
Dissected bitter bolete mushrooms (Tylopilus rubrobrunneus) in Lick Creek Park. College Station, Texas, July 23, 2018Yaupon Loop, College Station, TX 77845, USA
Reddish-brown bitter bolete mushrooms (Tylopilus rubrobrunneus) in Lick Creek Park. College Station, Texas, June 2, 2020Iron Bridge Trail, College Station, TX 77845, USA
Caps of bitter bolete mushrooms Tylopilus rubrobrunneus on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 31, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Bitter bolete mushrooms Tylopilus rubrobrunneus under pines on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 31, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Dissected bitter bolete mushrooms Tylopilus rubrobrunneus on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 31, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Reddish-brown bitter bolete mushroom (Tylopilus rubrobrunneus) in Lick Creek Park. College Station, Texas, July 5, 2021
Underside of reddish-brown bitter bolete mushroom (Tylopilus rubrobrunneus) in Lick Creek Park. College Station, Texas, July 5, 2021
Cross section of reddish-brown bitter bolete mushroom (Tylopilus rubrobrunneus) in Lick Creek Park. College Station, Texas, July 5, 2021
Reddish-brown bitter bolete mushroom (Tylopilus rubrobrunneus(?)) in Lick Creek Park. College Station, Texas, July 13, 202114802 Rock Prairie Rd, College Station, TX 77845, USA
Cross section of young reddish-brown bitter bolete mushroom (Tylopilus rubrobrunneus(?)) in Lick Creek Park. College Station, Texas, July 13, 202114802 Rock Prairie Rd, College Station, TX 77845, USA
Reddish-brown bitter bolete mushroom (Tylopilus rubrobrunneus) together with brown fibrecap (Inocybe) in Lick Creek Park. College Station, Texas, May 4, 2024Yaupon Loop Trail, College Station, Brazos County, Texas, United States
Section of reddish-brown bitter bolete mushroom (Tylopilus rubrobrunneus) in Lick Creek Park. College Station, Texas, May 4, 2024Yaupon Loop Trail, College Station, Brazos County, Texas, United States
Spores of reddish-brown bitter bolete mushroom (Tylopilus rubrobrunneus) collected in Lick Creek Park. College Station, Texas, May 4, 2024
Bitter bolete mushrooms Tylopilus rubrobrunneus on Road FS 231 near Pole Creek of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, September 26, 2024Forest Service Rd 231, Montgomery County, Texas, United States
Section of bitter bolete mushrooms Tylopilus rubrobrunneus on Road FS 231 near Pole Creek of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, September 26, 2024Forest Service Rd 231, Montgomery County, Texas, United States
Spores (in KOH) of bitter bolete mushrooms Tylopilus rubrobrunneus collected from Sam Houston National Forest north from Montgomery. Texas, September 26, 2024The fungus Tylopilus rubrobrunneus was observed in East and Central Texas over several years. The majority of sightings were in Lick Creek Park, College Station, with additional observations in Sam Houston National Forest near Huntsville and Montgomery. The mushrooms were typically found under pines or in wooded areas. Observations were made from June to September, with most occurring in July. The descriptions included various views of the mushroom, such as cap, underside, cross-section, and spores. Some observations noted the presence of other fungi, like Amanita and Inocybe, nearby. The consistency of sightings across multiple years and locations suggests that Tylopilus rubrobrunneus is a relatively common species in this region. Overall, these observations provide valuable information on the distribution and characteristics of this fungus in East and Central Texas.
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