koekoeksbloem

Etymology
From. Various theories have been proposed for the name, including that it is named after the cuckoo because the cuckoo's song is first heard again around the same time these flowers bloom in spring (which is not necessarily exactly true), or that it is named after the foam left behind by spittlebugs, which supposedly was named and associated particularly with these plants.

Noun

 * 1)  Any plant of the (former) genus, now generally included in the genus