Poached egg plant

Description:

The plant usually bears white flowers with yellow centers, hence the name "poached egg plant", but flower color can vary across subspecies. It is a popular ornamental plant. It attracts hoverflies to the garden to beat the aphids and is well loved by bees. It is self-seeding, and gardeners are often careful as to where the seeds fall as it will quite happily grow in a lawn.

Habitat:

It is native to California and Oregon, where it grows in wet, grassy habitat, such as vernal pools and spring meadows. It can grow in poorly drained clay soils. So I guess is here in Belgium as ornamental.