Extract from Wikipedia article: Peziza ammophila is a fungus in the cup fungus genus Peziza. It grows on sand dunes and beaches. As it gets older, it comes out from the sand and splits. It grows spring through winter, and in North America. It is cup shaped. The Dutch call these Zandtulpjes, or "sand tulips."
Cup mushrooms Peziza ammophila in a roadside depression on sandy soil completely burned 1.5 years ago and now covered by dry plants in Bastrop State Park. Bastrop, Texas, December 25, 2021 Old Road Bed, Bastrop County, Texas, 78602, United States
Side view of Ascomycete mushrooms Peziza ammophila in a roadside depression on sandy soil in area of a past fire in Bastrop State Park. Bastrop, Texas, December 25, 2021 Old Road Bed, Bastrop County, Texas, 78602, United States
Cross section of brown cup fungus Peziza ammophila in a roadside depression on sandy soil in Bastrop State Park. Bastrop, Texas, December 25, 2021 Old Road Bed, Bastrop County, Texas, 78602, United States
Spores of Ascomycete mushrooms Peziza ammophila collected in Bastrop State Park 12/25/2021. College Station, Texas, February 13, 2022
Spores of Ascomycete mushrooms Peziza ammophila of different colors in iodine solution, collected in Bastrop State Park 12/25/2021. College Station, Texas, February 13, 2022 Spore size 14.9 - 15.9 × 8 - 8.7 µm, length to width ratio Q = 1.7 - 1.9.