Petasites albus

Tracheophyta MagnoliopsidaAsteraceaePetasitesPetasites albus

Ecology

A dioecious rhizomatous perennial herb found established in woods and waste places, on waysides and shady riversides, occasionally forming large stands. The male plant is much more common than the female in our area. Lowland.

Status

Neophyte

World Distribution

Native of the mountains of Europe and S.W. Asia.

Broad Habitats

Light (Ellenberg): 5

Moisture (Ellenberg): 5

Reaction (Ellenberg): 5

Nitrogen (Ellenberg): 7

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 2.8

July Mean Temperature (Celsius): 13.9

Annual Precipitation (mm): 1000

Height (cm): 70

Perennation - primary

Perennial

Life Form - primary

Non-bulbous geophyte (rhizome, corm or tuber)

Woodiness

Herbaceous

Clonality - primary

Rhizome far-creeping

Count of 10km squares in Great Britain: 335

Count of 10km squares in Ireland: 10

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: 0.01

Weighted Changed Factor: 15

Weighted Change Factor Confidence (90%)

41

JNCC Designations

NHMSYS0000461629