Field gromwell

Lithospermum arvense

Importance

Autumn germinating plant but less commonly found in arable fields due to susceptibility to cereal herbicides. Associated with calcareous soils. Vigorous taproot containing red dye.

Field gromwell - young1. Large hairy cotyledons (20 mm in length) with marked leaf midrib.
Field gromwell 22. Leaves slender, long and thickly haired.



Field gromwell - mature3. Plants up to 50 cm and flowers small (4 mm in diameter), white.