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 places, sandy, calcareous places, walls and banks. The habit is erect or prostrate. The plant is downy or clammy, or hairless, branched from the base. The leaves are broadly egg-shaped or oval, the lower with long, linear tufts. The bracts in the upper half have a membranous border. The flowers are white, in cymes, few or many. The petals are slightly notched, with simple veins, shorter than the sepals. The 5 sepals are bent down between flowering and fruiting, and are glandular, acute, with broad, membranous margins. The stamens are 4-5, or 10. The capsule projects and is slightly curved, then erect. The fruit-stalk is longer than the calyx. The plant is 1-8 in. high, flowering from April to June, and is a herbaceous annual.
The habitat of this species is dry places, fields, and banks. The habit is erect as in the last, or branched, but the plant is larger and the leaves oval-shaped, pale-green. The bracts are not membranous, hairy. The flowers are in close, tufted cymes, more or less forming a head at first, longer than the stalks. The petals are divided into two nearly to the base, not so long as the sepals. They are acute, lance-shaped, the margin narrowly membranous, hairy, with few glands. The capsule is twice as long as the sepals, bent, cylindrical, the stalks as long as the calyx. The plant is 3-10 in. high, flowering between April and September, and is a herbaceous perennial.
The habitat of this species is dry rocks, pastures, banks, rocky places in mountainous districts. The habit is the rosette or cushion habit. The stems are tufted. The rootstock is woody. The plant is bright-green, glandular, with few hairs. The leaves are appressed, awl-like, linear, crowded, 3-nerved, acute, with a sharp point. The flowers are few, white, on slender, rigid branches. The bracts are acute, with membranous margins. The flower-stalks are slender, glandular. The sepals are ovate, lance-shaped, acute, 3-veined, with membranous margin. The petals are round, inversely ovate, narrow below, longer than the calyx. The capsule exceeds the sepals. The plant is 1-4 in. high, flowering from June to September, and is a herbaceous perennial.
Lloyd's Sandwort is found in dry places and on wall-tops. The habit is prostrate, or more or less erect. The stem is much-branched, rigid, downy, greyish-green, the hairs bent back. The leaves are ovate, long-pointed, more or less stalkless, 1-3 nerved, fringed with hairs. The flowers are numerous, white, in cymes from forks of the stem or axils of the leaves, with leaflike bracts. The sepals have 3-5 hairy ribs, with narrow margins, and are longer than the petals, ovate, lance-shaped, acute. The petals are ovate, narrowed below. The fruit-stalks are erect or spreading, straight, longer than the capsule. The capsule is pitcher-like, ovoid, brittle when ripe. The seeds are rough, shining, without an aril. The plant is 2-12 in. high, flowering from May to August, and is a herbaceous annual.
The habitat of this plant is summits of lofty Scotch mountains. The habit is the cushion habit. The plant is tufted, with many compact stems, with a long tap-root, short, moss-like. The leaves are numerous, linear, awl-like, fringed with fine hairs, overlapping, 3-angled, blunt, grooved above. The flowers are solitary, often apetalous, stalk-less, or shortly-stalked. The sepals are blunt, 3-nerved, with membranous borders. In the male flowers the petals are awl-like. The capsule is egg-shaped, not so long as the sepals. The plant is 1-2 in., forming cushions 6 in. to 1 ft. in diameter, and flowers from June to August, being a herbaceous perennial.