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 sandy cornfields, gravelly fields, cultivated fields, on light soil. The habit is erect. The stem is rounded, glandular, simple or forked, the leaves below stalked, inversely egg-shaped, the upper lance-shaped, acute. The flowers are in a panicle, open at night, are fragrant, creamy-white. The calyx is oblong, elliptic, clammy, veined with 10 ribs, glandular, the teeth long and awl-shaped. The flower-stalks are glandular also. The petals are crowned, divided into two nearly to the base, rolled up in the daytime. The capsule is egg-shaped and has no septa, being as the calyx. The plant is 1-2 ft. in height, but frequently 6-8 in. It is in flower between July and September. It is a herbaceous annual.
This plant is a colonist, found in cornfields, cultivated ground. The habit is erect. The stem is succulent, the leaves in whorls, longer than in the Common Spurrey, and the internodes are longer, the leaves grey-green, linear, fleshy, very clammy. There are 2 stipules below the leaves. The flowers are white, the seeds black, flattened, with a narrow wing, with minute, elevated points, not wart-like projections. The plant is 4-15 in. in height, and flowers from June to August, being a herbaceous annual.