Synonyms: Elaphomyces laevigatus, Rhizopogon induratus, Tuber luteolum.
Common name: yellow false truffle.
Extract from Wikipedia article: Rhizopogon luteolus is an ectomycorrhizal fungus used as a soil inoculant in agriculture and horticulture. It was deliberately introduced into Pinus radiata plantations in Western Australia after it was observed to improve tree growth.
Basque: Sasiboilur hori, Chinese: 须腹菌, Dutch: Okerkleurige vezeltruffel, Estonian: Kollakas juurepähkel, Finnish: Keltajänönmukula, Lithuanian: Gelsvasis šakniagrybis, Swedish: Gulbrun hartryffel, Welsh: Ffug-gloren felen.
Rhizopogon luteolus is a species of fungi that belongs to the family Rhizopogonaceae. It is characterized by its yellowish-brown to golden-brown sporocarps, which are subterranean to partially exposed, and typically 1-4 cm in diameter. In East and Central Texas, R. luteolus has been found to associate with various tree species, including loblolly pine, shortleaf pine, and oak. The fungus is ectomycorrhizal, forming symbiotic relationships with the roots of these trees. It fruits from summer to fall, often in areas with sandy or clay soils.
False truffle (Rhizopogon luteolus) covered by some white mold fungus Hypomyces near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023
Lone Star Hiking Trail, Montgomery County, Texas, United States
Cross section of false truffle (Rhizopogon luteolus) covered by some white Hypomyces mold fungus near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023Lone Star Hiking Trail, Montgomery County, Texas, United States
Yellow false truffle mushroom (Rhizopogon luteolus) near exposed pine roots near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023Lone Star Hiking Trail, Montgomery County, Texas, United States
Yellow false truffle fungus (Rhizopogon luteolus) on a path near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023Lone Star Hiking Trail, Montgomery County, Texas, United States
Cross section of yellow false truffle fungus (Rhizopogon luteolus) near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023Lone Star Hiking Trail, Montgomery County, Texas, United States
Close-up of interior section of yellow false truffle fungus (Rhizopogon luteolus) near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023Lone Star Hiking Trail, Montgomery County, Texas, United States
Tissues at low magnification of false truffle mushroom (Rhizopogon luteolus) collected in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023
Cystidia(?) and spores of false truffle mushroom (Rhizopogon luteolus) collected in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023
Masses of spores and some large structures of false truffle mushroom (Rhizopogon luteolus) collected in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023
Large (3x4 cm) false truffle Rhizopogon luteolus in Bastrop State Park. Bastrop, Texas, May 17, 2024Lost Pines Trail, Bastrop County, Texas, United States
Spores of a large false truffle Rhizopogon luteolus collected in Bastrop State Park. Bastrop, Texas, May 17, 2024
False truffle Rhizopogon luteolus on Forest Service Road 231 near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, November 7, 2024Forest Service Rd 231, Montgomery County, Texas, United StatesObservations of Rhizopogon luteolus in East and Central Texas revealed the fungus growing in various locations, including near pine roots and on paths. The false truffle was often found covered in a white mold fungus, Hypomyces. Cross-sections of the fungus showed its interior structure, and microscopic examination revealed cystidia and spores. The fungus was observed in Sam Houston National Forest, where it was found in sizes ranging from small to large (3x4 cm). Similar observations were made in Bastrop State Park, where a large false truffle was collected and its spores examined. The fungus was also spotted on Forest Service Road 231 near Pole Creek. These observations suggest that Rhizopogon luteolus is present in various habitats in East and Central Texas, often associated with pine trees.
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