Asteraceae: an upright hairless perennial. Stems are often tinged purple and exude a milky sap when broken. Grows on shady banks and walls, usually on chalky soils. The flower are yellow and up to 10mm across, appearing from June-September. The leaves are pinnate, with the end lobe triangular, and the upper leaves clasping. Widespread but only locally common. Native to most of Europe, including Britain, from Scandinavia south and east to North Africa, the Caucasus and Western Asia.
The leaves can be eaten raw, and can be used in mixed salads.
Prefers a shady position, well drained site, best on alkaline soils. Surface sow any time of the year.