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.
The habitat of this plant is dry fields and sandy fields. The habit is prostrate, the stem simple, or branched irregularly, bluish-green. The leaves are erect, all growing one way. The flowers are green and white, the segments of the calyx in fruit united below, blunt, rounded, with a broad membranous margin. The tube of the calyx is downy, and the bracts are short. The styles are not so long as the stamens. The plant is 2-8 in. in length. Flowers are found from June to September. The plant is a herbaceous perennial.