This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
This plant is a casual, and found on cultivated ground, being local. The habit is nearly erect, the leaves egg-shaped, stalkless. The petals are blue, and have no glandular hairs or rarely so, the corolla being as long as the calyx. The plant is 6-12 in. in height, and is in flower from June to November, being a herbaceous annual.