Synonyms: Boletus stramineus, Gyroporus stramineus, Leucogyroporus stramineus.
Extract from Wikipedia article: Xanthoconium stramineum is a species of bolete fungus and the type species of the genus Xanthoconium. First described as a species of Gyroporus by William Alphonso Murrill in 1940, it was placed in its current genus by Rolf Singer in 1944.
Xanthoconium stramineum is a species of bolete fungus that produces medium to large-sized fruiting bodies with a yellow-brown to straw-colored cap and white to pale yellow pores. In East and Central Texas, it typically fruits in late summer to early fall, often in association with oak and pine trees. The stem is usually stout, with a reticulate pattern near the apex, and the spore print is olive-brown. This fungus can be found in a variety of habitats, including woodland edges, sandy soils, and along roadsides, particularly in areas with an abundance of Quercus and Pinus species.
Bolete mushrooms Xanthoconium stramineum under a small blackjack oak on Roosevelt's Cutoff Trail in Bastrop State Park. Bastrop, Texas, October 14, 2018
Bastrop State Park, 100 Park Road 1A, Bastrop, TX 78602, USA
Side view of bolete mushrooms Xanthoconium stramineum under a small blackjack oak on Roosevelt's Cutoff Trail in Bastrop State Park. Bastrop, Texas, October 14, 2018Bastrop State Park, 100 Park Road 1A, Bastrop, TX 78602, USA
Dissected bolete mushrooms Xanthoconium stramineum under a small blackjack oak on Roosevelt's Cutoff Trail in Bastrop State Park. Bastrop, Texas, October 14, 2018Bastrop State Park, 100 Park Road 1A, Bastrop, TX 78602, USA
Small dissected bolete mushroom Xanthoconium stramineum in Bastrop State Park. Bastrop, Texas, October 14, 2018Bastrop State Park, 100 Park Road 1A, Bastrop, TX 78602, USA
Top view of bolete mushrooms Xanthoconium stramineum in Bastrop State Park. Bastrop, Texas, May 17, 2024Lost Pines Trail, Bastrop County, Texas, United States
Underside of bolete mushrooms Xanthoconium stramineum in Bastrop State Park. Bastrop, Texas, May 17, 2024Lost Pines Trail, Bastrop County, Texas, United States
Pore surface of bolete mushrooms Xanthoconium stramineum in Bastrop State Park. Bastrop, Texas, May 17, 2024Lost Pines Trail, Bastrop County, Texas, United States
Cross section of bolete mushrooms Xanthoconium stramineum in Bastrop State Park. Bastrop, Texas, May 17, 2024Lost Pines Trail, Bastrop County, Texas, United States
Spores of bolete mushrooms Xanthoconium stramineum collected in Bastrop State Park. Bastrop, Texas, May 17, 2024
Spore size 9.7 - 11.6 × 2.83 - 3.3 µm, length to width ratio Q = 3.13 - 3.7.Observations of the fungus Xanthoconium stramineum in East and Central Texas revealed its association with small blackjack oak trees. On October 14, 2018, bolete mushrooms were found under a small blackjack oak on Roosevelt's Cutoff Trail in Bastrop State Park, with multiple specimens observed from different angles. Dissection of the mushrooms showed their internal structure. Similar observations were made on May 17, 2024, with top and underside views, as well as detailed examinations of the pore surface and cross-section. Spores were also collected for further study. The consistent presence of Xanthoconium stramineum under blackjack oak trees in Bastrop State Park suggests a possible symbiotic relationship between the fungus and the tree species. The observations provide valuable insights into the habitat and morphology of this fungus in East and Central Texas.
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