''Peziza ammophila'' is a fungus in the cup fungus genus ''

Peziza ''Peziza'' is a large genus of saprophytic cup fungi that grow on the ground, rotting wood, or dung. Most members of this genus are of unknown edibility and are difficult to identify as separate species without use of microscopy. The polyphyleti ...

''. It grows on sand dunes and beaches. As it gets older, it comes out from the sand and splits. It grows in winter and spring, and there are records from North America, Argentina, Chile, the UK, Europe, Australia and South Africa. It is cup shaped. The Dutch call these Zandtulpjes, or "sand tulips."''Mushrooms of the Redwood Coast'' by Noah Siegel and Christian Schwarz

References

Pezizaceae Fungi described in 1841 Fungus species {{Pezizomycetes-stub