''Knautia arvensis'', commonly known as Field Scabious, is a species in the genus ''Knautia''.
Specie identified by Joost Thissen
It is a perennial plant that grows between 25 and 100 cm. It prefers grassy places and dry soils, avoiding heavy soils, and flowers between July and September. The flowered head is flatter than similar species Devils bit scabious and Small Scabious. There are 4 stamens in each flower, and 1 notched long stigma.
The fruit is nut like, cylindrical and hairy, 5–6 mm in size.