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 wet sandy and boggy places. The habit is prostrate, then ascending. The stem is slender, hairless, and the plant is branched from the root. The branches are ascending, covered with leaves and flowers in tufts. The leaves are round, variable, egg-shaped, spoon-shaped, oblong, hairless. The flowers are in whorls (hence verticillatuni) in the axils, small, with a short stalk, not so long as the leaves. The plant is 2-8 in. high, flowering in July and August, and is a herbaceous perennial.
The habitat of this plant is sandy shores and dry places, damp sandy spots near the sea. The habit is prostrate or ascending. The stems are many, slender, leafy, amongst the flowers. The leaves are linear, lance-shaped, narrowed into an obscure stalk. The stipules are half arrow-shaped, oblong. The flowers are white, stalked, small, crowded, in small clusters, or terminal cymes. The petals and sepals are the same size. There are 3 stigmas, and the anthers are small. The plant is 3-9 in. in length, and flowers between July and September, being a herbaceous annual.
The habitat of this plant is sandy soils and dry places. The habit is prostrate or subterranean. The stems are herbaceous, numerous, tufted, hairless or downy, clothed with bent-down hairs. The autumnal shoots are ascending, irregularly branched, with spreading, not overlapping leaves. The lateral branches resemble leafy spikes from the close clusters. The plant is pale yellowish-green. The root is woody. The leaves are oblong, hairless, narrowed below. The flowers are small, green, stalkless, in axillary spike-like clusters. The calyx is hairless or thinly hairy. The fruit is 1-seeded. The plant is 4-6 in. long, flowering in July and August, and is a herbaceous annual, biennial, or perennial.
This plant was regarded as a variety of the last, than which it is much stouter, forming- larger tufts, with broader leaves, larger, whiter stipules. The habit is prostrate. The plant is dark-green. The root is strong and woody, the stem spreading from the crown, but scarcely rooting until the autumn, when it is prostrate, with regular alternate branches, the leaves in two rows, overlapping. The stem is shrubby, with small bent-down hairs on the upper surface only. The leaves are round to egg-shaped, fringed with hairs (hence ciliatd). The flowers are in clusters of 1-3, in small distinct clusters, stalkless, in the axils of the lateral branches. The flowers are larger than in the last. The sepals are bristle-pointed. The plant flowers in July and August, and is a herbaceous, diminutive, shrub-like perennial.
The habitat of this plant is sandy ground, waste places, cultivated ground. The habit is prostrate. The stem is herbaceous, clothed with straight, spreading hairs (hence hirsuta). The leaves are elliptic, oblong, hairy, narrow both ends, yellowish-grey. The calyx is hairy like a small bur. The plant is 4-6' in. high, flowering in July and August, and is a herbaceous annual.