Petasites spurius

Woolly butterbur ( Petasites spurius )

The Woolly butterbur ( Petasites spurius ) is a flowering plant in the sunflower family ( Asteraceae).

Description

The perennial, outlasting with rhizomes plant reaches heights of growth 10 to 30 centimeters. The leaf blades are triangular in outline, cordate, wider than long, with coarse to cambered - serrated leaf edge, large open bay leaf and tapered basal- lateral parts. Under hand, they are tight hairy schneeweißfilzig (name ).

The inflorescence is composed of numerous, densely racemose arranged flower heads. The flowers are pale yellow. The flowering period extends from March and April, before the formation of the leaves.

The chromosome number is n = 30

Occurrence

The Woolly butterbur occurs on beaches, dunes and river banks. On the Baltic Sea coast it is found from Schleswig-Holstein to Prussia, as well. Danish islands of Fyn with the exception of In river valleys it is scattered to Magdeburg, Berlin and Kuestrin encountered.

System

The specific epithet spurius means " out of wedlock, fathered by an unknown father with a prostitute " and refers to species whose taxonomic classification presented difficulties.

This species was first described by Retzius in 1779 as Tussilago spuria and thus adopted as a sister species in addition to the coltsfoot. De Candolle then ordered the plant Petasites tomentosus 1805 as the Pestwurzen to before Reichenbach received the today valid botanical name Petasites spurius 1831.