WHITE BUTTERBUR

Petasites albus

Daisy & Dandelion [Asteraceae]

month8mar month8march month8apr month8april month8may

flower
flower8white
 
morph
morph8actino
 
petals
petalsZ5
 
type
typeZclustered
 
type
typeZspiked
 
stem
stem8round
 
smell
smell8fragrant smell8scented smell8scent
scent
toxicity
toxicityZlowish
 

13th April 2009, Sett Valley Trail, New Mills. Photo: © RWD
Spreading up a damp embankment.


28th Feb 2008, Tixal, Whaley Bridge, Derbys. Photo: © RWD
Growing near a garden by a brrok.


28th Feb 2008, Tixal, Whaley Bridge, Derbys. Photo: © RWD
A frothy mass f white flowers on separate plants.


28th Feb 2008, Tixal, Whaley Bridge, Derbys. Photo: © RWD
Male and female flowers grow on separate plants, this is a male.


Photo: © Philip Haigh


28th Feb 2008, Tixal, Whaley Bridge, Derbys. Photo: © RWD
The flowers have five narrow white petals (best seen lower right), and are narrower than those of Butterbur. The plants with male flowers are distinguished from those with female flowers by the five-petalled star with elongated stamen.


Photo: © Philip Haigh
White Butterbur has long and pale-green sepals whereas in normal Butterbur they are much shorter (the Author thinks, but is un-sure of the white-coloured Butterburs lower down the page).


Photo: © Philip Haigh
This and the above photos are all of the much commoner male form of White Butterbur.


13th April 2009, Sett Valley Trail, New Mills. Photo: © RWD
The leaves are different to those of Butterbur, although of similar cardiod outline, they are loner, and some have a distinctive arrow-head shape. The flower spikes can be reddish. It is possible that this and all the following plants are all of the rarer female form of White Butterbur.


13th April 2009, Sett Valley Trail, New Mills. Photo: © RWD
Reddish stems bearing numerous short narrow purplish bracts and short stalks with a single compound flower on the end.


13th April 2009, Sett Valley Trail, New Mills. Photo: © RWD
The compound flowers can at times look similar to shaving brushes.


13th April 2009, Sett Valley Trail, New Mills. Photo: © RWD
These compound flowers seem to have but one central five-petalled flower.


13th April 2009, Sett Valley Trail, New Mills. Photo: © RWD
The flower head is cupped by numerous light-green sepals, the flower stem has many very shorter and narrower purple bracts.


13th April 2009, Sett Valley Trail, New Mills. Photo: © RWD
The plants have few leaves, these are oval-cardioid shaped.


13th April 2009, Sett Valley Trail, New Mills. Photo: © RWD
A mixture of the cardiod leaves and oval-cardiod ones with a slight point on the furthest extremity. Prominent lighter-coloured lilac veins.


13th April 2009, Sett Valley Trail, New Mills. Photo: © RWD
The stems have a whitish-pink fibrous appearance.


Grows in similar places to Butterbur (damp woods, beside streams and fresh water).

Many similarities to : Butterbur but that has mauve to purplish flowers whereas White Butterbur has all white flowers. Also the leaves of White Butterbur, although cardiod in outline, can be more elongated, some ending in a blunt point (but others looking similar in shape to those of Butterbur.

Not to be confused with : Butterwort [a plant of similar name]

No relation to : Piri-piri-bur, London Bur-Marigold, Nodding Bur-Marigold,Trifid Bur-Marigold, Bur Chervil, Un-branched Bur-Reed, Branched Bur-Reed Least Bur-reed [plants with similar names].

White Butterbur is an introduced plant, grown in gardens, but now also growing wild, mainly in the North of the UK, especially in Scotland.

Just like Butterbur, the male and female flowers of White Butterbur occur on separate plants, with the female plant being much the rarer. The author assumes that the above two differing forms represent both male and female of the same species. It is rare in the south of the UK, but frequent in the north, especially in Scotland.


Distribution
 family8Daisy & Dandelion family8Asteraceae
BSBI maps
genus8Petasites
Petasites
(Butterburs)

WHITE BUTTERBUR

Petasites albus

Daisy & Dandelion [Asteraceae]

WildFlowerFinder Homepage