Pictorial guide to the flora of the British Isles

Home ⟩ Pictorial Guide ⟩ Asteraceae / Compositae ⟩ Petasites japonicus / giant butterbur

Petasites japonicus (Siebold & Zucc.) Maxim.

giant butterbur (Asteraceae / Compositae)

 SpreadBias within British IslesDirection of bias
RestrictedSlight tendencySE
Plant Atlas 2020
BSBI Distribution Map

Petasites japonicus is rightly named the giant butterbur; its leaves can reach several feet across.

Tidmarsh (VC22: Berkshire); 2015-08-03

 giant butterbur / Petasites japonicus: _Petasites japonicus_ is rightly named the giant butterbur; its leaves can reach several feet across.

The inflorescences of Petasites japonicus appear before the basal leaves, with several broad, untoothed bracts at their base.

Oxford (VC23: Oxfordshire); 2016-01-15

 giant butterbur / Petasites japonicus: The inflorescences of _Petasites japonicus_ appear before the basal leaves, with several broad, untoothed bracts at their base.

All images copyright © Christopher J. Dixon unless otherwise indicated.

L-R: Bidens tripartita, Melilotus officinalis, Mimulus guttatus, Thalictrum flavum, Ranunculus peltatus, Anchusa arvensis, Malva alcea, Lolium perenne