Synonyms: Boletus frostii, Exsudoporus frostii, Suillellus frostii, Suillus frostii, Tubiporus frostii.
Common name: Frost's Bolete.
Butyriboletus frostii is a species of bolete fungus characterized by its brown to tan cap, yellow to olive pores, and stout stem. In East and Central Texas, it typically fruits from June to October under deciduous and mixed forests, often associated with oak and pine trees. The fungus can be found in a variety of habitats, including woodland edges, ravines, and along streams. Its distribution in the region appears to be scattered, with sightings reported in counties such as Bastrop, Brazos, and McLennan.
Observations of Butyriboletus frostii in East and Central Texas reveal a distinct association with oak trees. In Lick Creek Park, College Station, Texas, Candy Apple Bolete mushrooms were found growing under oaks on July 19, 2018. The fungus was observed to be abundant in areas with rich soil and dense oak canopies. Further observations in the region showed that Butyriboletus frostii tends to fruit in late summer, typically from June to August, with a peak in July. The mushrooms were often found in clusters or scattered individuals, with caps ranging in color from bright red to orange-yellow. The boletes were also noted to have a distinctive sweet, fruity aroma and a soft, velvety texture. These observations suggest that Butyriboletus frostii is well adapted to the warm, humid climate of East and Central Texas.
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