Extract from Wikipedia article: Atheniella flavoalba, which has the recommended name of ivory bonnet in the UK, is a species of agaric in the family Cyphellaceae. The cap is initially conical, before becoming convex and then flat; it may reach up to 1.5 cm (0.6 in) across. The cap is ivory-white to yellowish white, sometimes more yellowish at the center. The tubular stems are up to 8 cm (3.1 in) long and 2.5 mm (0.10 in) thick, and have long, coarse white hairs at their bases. Atheniella flavoalba is found in Europe, the Middle East, and North America, where it grows scattered in pastures or in dense groups under conifers and on humus in oak woods.
Small white mushrooms Ivory bonnet (Atheniella flavoalba)(?) in Hensel Park. College Station, Texas, November 16, 2023 355, East Brookside Drive, Bryan, Brazos County, Texas, 77801, United States
Small white mushrooms Ivory bonnet (Atheniella flavoalba) among dry leaves in Hensel Park. College Station, Texas, November 16, 2023 353, East Brookside Drive, Bryan, Brazos County, Texas, 77801, United States
Spores of small white mushrooms Ivory bonnet (Atheniella flavoalba) found among dry leaves, collected in Hensel Park. College Station, Texas, November 16, 2023 Spore size 6.7 - 7.5 × 4.6 - 5.05 µm, length to width ratio Q = 1.4 - 1.6.
Ivory bonnet mushrooms (Atheniella flavoalba)(?) or may be Lactocollybia on a fallen mossy osage orange (Maclura), around 1 meter above ground, on Caney Creek Trail (Little Lake Creek Loop Trail) east from Trailhead No. 4 in Sam Houston National Forest north from Montgomery. Texas, November 25, 2023 Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Spores of ivory bonnet mushrooms (Atheniella flavoalba)(?) or may be Lactocollybia from a fallen mossy osage orange (Maclura), collected a day before in Sam Houston National Forest north from Montgomery. Texas, November 26, 2023