Synonym: Boletus campestris.
Hortiboletus campestris is a species of bolete fungus that grows in association with grasses and other herbaceous plants. In East and Central Texas, it typically fruits from April to October, producing small to medium-sized caps that are yellow to brown in color, often with a reddish or pinkish tint. The pores on the underside of the cap are yellow to orange-yellow, and the stipe is slender and colored similarly to the cap. This fungus can be found in lawns, meadows, and other grassy areas, where it grows singly or in small groups.
Observations of Hortiboletus campestris in East and Central Texas reveal that the fungus grows in association with specific tree species. In College Station, Texas, the mushrooms were found under a live oak on a lawn on James Parkway in November 2017. Similar observations were made in College Station Cemetery, where red-capped bolete mushrooms were found under crape myrtle and live oaks in October 2021. The cross section of these mushrooms confirmed their identity as Hortiboletus campestris. These sightings suggest that the fungus prefers lawns with specific tree species, such as live oaks and crape myrtles, in the region. The observations also indicate that the mushroom can fruit in both fall months, specifically October and November, in East and Central Texas.
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