This is a very small (2-15cm) hairy annual with tiny blue flowers, which is found on dry shallow soils and bare rocky limestone. It flowers between April and June and has usually fruited and died away by mid to late summer. It is under-recorded and probably overlooked as it can be very inconspicuous. It likes sunny south-facing slopes and can sometimes be found in patches of many individuals.
The distribution of this plant in Somerset is shown below (updated March 2021).