Attested 19th century, chiefly from Low German dialects. Analysable as pusten (“to blow”) + Blume (“flower”), from the children’s habit of blowing off the seeds. However, this may be only a remotivation of an underlying dialectal Pissblume, from the dandelion's diuretic effect; compare Dutch pisbloem.
Pusteblume f (genitive Pusteblume, plural Pusteblumen)
- “Pusteblume” in Duden online