Synonyms: Agaricus argyraceus, Agaricus chrysites, Agaricus scalpturatus, Cortinellus scalpturatus, Cortinellus terreus, Gyrophila argyracea, Monomyces scalpturatum, Tricholoma argyraceum, Tricholoma chrysites, Tricholoma myomyces, Tricholoma terreum.
Common name: yellowing knight.
Extract from Wikipedia article: Tricholoma scalpturatum is a species of agaric fungus in the family Tricholomataceae. Found in Europe, it grows in a mycorrhizal association with deciduous trees including Quercus, Fagus, Tilia, and Populus, and occasionally with Pinus.
Basque: Negrilla ziza horikor, Dutch: Zilvergrijze ridderzwam, Finnish: Hiirenvalmuska, French: Tricholome jaunissant, Hungarian: Sárguló pereszke, Lithuanian: Gelsvėjantysis baltikas, Polish: Gąska żółknąca, Swedish: Gulnande musseron, Welsh: Marchog melynol.
Tricholoma scalpturatum is a species of fungus that belongs to the family Tricholomataceae. It is characterized by its medium to large size, grayish-brown cap, and white to pale yellow gills. In East and Central Texas, it typically fruits in the fall, often in association with oak trees, particularly live oak and post oak. The fungus can be found growing solitary or in small groups on the ground in wooded areas, including urban parks and rural landscapes. Its distribution in this region tends to be scattered, but it can be locally common in suitable habitats.
Yellowing knight mushrooms (Tricholoma scalpturatum) in Lick Creek Park. College Station, Texas, February 3, 2023
Iron Bridge Trail, College Station, Brazos County, Texas, United States
Gills of yellowing knight mushroom (Tricholoma scalpturatum) in Lick Creek Park. College Station, Texas, February 3, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Side view of yellowing knight mushrooms (Tricholoma scalpturatum) in Lick Creek Park. College Station, Texas, February 3, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Spores of yellowing knight mushrooms (Tricholoma scalpturatum) collected in Lick Creek Park. College Station, Texas, February 3, 2023
Spore size 4.74 - 5.6 × 2.8 - 3.2 µm, length to width ratio Q = 1.6 - 2.
Yellowing knight mushrooms (Tricholoma scalpturatum) under post oaks in half open area in Lick Creek Park. College Station, Texas, January 25, 2024Iron Bridge Trail, College Station, Brazos County, Texas, United States
Underside of yellowing knight mushrooms (Tricholoma scalpturatum) under post oaks in half open area in Lick Creek Park. College Station, Texas, January 25, 2024Iron Bridge Trail, College Station, Brazos County, Texas, United States
Spores of yellowing knight mushrooms (Tricholoma scalpturatum) collected a day before in Lick Creek Park. College Station, Texas, January 26, 2024Spore size 5.1 - 5.86 × 3 - 3.4 µm, length to width ratio Q = 1.6 - 1.77.Observations of Tricholoma scalpturatum in East and Central Texas reveal the fungus grows under post oaks in half-open areas, such as Lick Creek Park in College Station. The mushrooms were found on February 3, 2023, and again on January 25, 2024, indicating a possible winter or early spring fruiting period. The gills of the mushroom were observed, and spores were collected on both occasions, with samples taken on consecutive days in January 2024. The mushrooms were seen growing in groups, with side views and underside observations providing further detail on their morphology. The consistent presence of Tricholoma scalpturatum in this specific habitat suggests a symbiotic relationship with the post oak trees. Overall, these observations contribute to a better understanding of the ecology and distribution of this fungus species in East and Central Texas.
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