Petasites albus, the white butterbur,[1] is a flowering plant species in the family Asteraceae.

Petasites albus is a perennial rhizomatous herb, with large suborbicular (almost round) leaves covered with lax cottony hairs.

[2]: 771 The native range of Petasites albus is the mountains of central Europe and the Caucasus.

[3] In the British Isles it is a neophyte, introduced by the 17th century and naturalized in Yorkshire by 1843, but now predominantly distributed in North-east Scotland.

[4] It prefers damp soils in deciduous forests, mountain pastures, springs and streamsides, roadside verges and other areas of rough ground.