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 fields. The habit is spreading, and the plant resembles G. spurium, but has stiffly hairy fruit, with hooked bristles, and small green flowers in a cyme, 3-9. The leaves are 6-8 in a whorl, linear, strap-shaped. The plant is lighter green than the Common Cleavers, and the fruit is pale. The stem is rough, and the leaves have turned-down prickles. The plant is 1-3 ft. in height, and flowers in July, being a herbaceous annual.
The habitat of this plant is cultivated fields, cornfields, etc. The habit is similar to that of Cleavers, the stem prostrate, then ascending and spreading. The leaves are narrow at the tip, 6-8 in a whorl, linear, lance-shaped, rough, the prickles turned back at the margin, and the 3 small creamy-white flowers are in a cyme, on axillary flower-stalks, shorter than the leaves, the middle one only perfect. The fruit is granular, large, white, and the fruit-stalk is turned back eventually. The plant is 4-12 in. in height, and is in flower from June to October. It is a herbaceous annual.
This plant is an alien or casual, found in cornfields and waste places. It resembles Field Madder, but has 6-10 leaves in a whorl, which are long, blunt, linear, lance-shaped. The terminal flowers are blue, in a cluster, with a fringe of long hairs around them. The fruit is smooth. The plant varies in height from 3-12 inches, and flowers in June, July, and August. It is a herbaceous annual.