Common names: egghead mottlegill, Shiny Mottlegill.
Extract from Wikipedia article: Panaeolus semiovatus var. semiovatus, also known as Panaeolus semiovatus and Anellaria separata, is a medium-sized buff-colored mushroom/toadstool that grows on horse dung, and has black spores. Though nonpoisonous, it is generally regarded as inedible, and a few people experience gastric upset after consumption. Its common names are the shiny mottlegill, or egghead mottlegill.
Egghead mottlegill mushrooms (Panaeolus semiovatus) on horse dung in Lick Creek Park. College Station, Texas, June 4, 2021 14802 Rock Prairie Rd, College Station, TX 77845, USA
Underside of egghead mottlegill mushrooms (Panaeolus semiovatus) from horse dung in Lick Creek Park. College Station, Texas, June 4, 2021 14802 Rock Prairie Rd, College Station, TX 77845, USA
Egghead mottlegill mushrooms (Panaeolus semiovatus) and dung-loving Psilocybe mushrooms Deconica coprophila (Psilocybe coprophila) on black background in Lick Creek Park. College Station, Texas, June 4, 2021 14802 Rock Prairie Rd, College Station, TX 77845, USA
Egghead mottlegill mushrooms (Panaeolus semiovatus) on horse dung in Lick Creek Park. College Station, Texas, September 1, 2022 Racoon Run Trail, College Station, Brazos County, Texas, United States
Egghead mottlegill mushroom (Panaeolus semiovatus) on horse dung in Lick Creek Park. College Station, Texas, September 1, 2022 Racoon Run Trail, College Station, Brazos County, Texas, United States
Side view of egghead mottlegill mushrooms (Panaeolus semiovatus) on horse dung in Lick Creek Park. College Station, Texas, September 1, 2022 Racoon Run Trail, College Station, Brazos County, Texas, United States
Underside of egghead mottlegill mushrooms (Panaeolus semiovatus) on horse dung in Lick Creek Park. College Station, Texas, September 1, 2022 Racoon Run Trail, College Station, Brazos County, Texas, United States
Gills of egghead mottlegill mushrooms (Panaeolus semiovatus) on horse dung in Lick Creek Park. College Station, Texas, September 1, 2022 Racoon Run Trail, College Station, Brazos County, Texas, United States
Spores of egghead mottlegill mushrooms (Panaeolus semiovatus) from horse dung (spore print completely black) under a microscope with x40 objective in KOH solution, collected in Lick Creek Park. College Station, Texas, September 1, 2022
Spores of egghead mottlegill mushrooms (Panaeolus semiovatus) from horse dung under a microscope with x100 objective in KOH solution, collected in Lick Creek Park. College Station, Texas, September 1, 2022