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 old walls, hedges near gardens, old castle walls. The habit is erect. The plant is smooth, bluish-green, stout, much-branched, leafy below. The barren stems are long, prostrate, then ascending, branched. The leaves are channelled above, bent-back, with smooth margins, linear. The flowers are pink, fragrant, in loosely-panicled cymes, solitary. The bracts are inversely ovate, blunt-pointed, 1/3-1/4the length of the calyx-tube. The calyx is cylindric, obscurely ribbed, the teeth not fringed with hairs, longer than the capsule. The petals are scalloped, toothed, inversely ovate, smooth, the teeth 1/8-1/4 the length of the blade. The capsule is ovoid. The seeds are pear-shaped, nearly flat. The plant is 12-18 in. high, flowering in July and August, and is a herbaceous perennial.
This plant is semi-naturalized, or an escape on old walls, and a frequent garden plant. The habit is erect. The plant is tufted and branched. The barren stems are prostrate, much-branched, rooting. The leaves are linear, awl-like, acute, 1-nerved, with rough margins. The flowers are fragrant, solitary, in loose cymes, rose or pale-pink, or white, and the lobes of the fringed petals are as long as the blade. The petals are much-divided to the middle, digitate, downy, the central part inversely ovate, entire. The calyx-lobes are round to ovate, blunt-pointed, four times less than the tube, fringed with hairs at the margin. The capsule is longer than the calyx-teeth. The seeds are flat, rounded, with a point one side. The plant is 6-12 in. high, flowering in June and July, and is a herbaceous perennial.
The petals are divided nearly to the base. The plant is 6-24 in. high, flowering from July to September, and is a herbaceous annual.
The habitat of this plant is alpine rocks. The plant has the cushion habit, and is densely tufted, branched, bright-green, smooth. The leaves are close, linear, awl-like, fringed with hairs below, channelled above, keeled below. The flowers are rose colour or white, solitary, borne on long smooth stalks, longer in fruit, or nearly stalkless, erect. The calyx is tubular, bell-shaped, smooth, with 10 striae, the teeth oval, blunt, with membranous borders. The petals are crowned, slightly notched. The capsule is twice as long as the calyx, more or less cylindrical, exserted, with 6 teeth. The plant is 1-3 in. high, flowering from May to August, and is a herbaceous perennial.
The habitat of this Campion is sandy and gravelly places, fields and roadsides, heathy places, and the plant is considered, with others, to be possibly a member of a steppe flora. The habit is erect, or the rosette habit. The stems are simple, sticky at the base. This may exclude creeping insects from the flowers. The rootstock is woody and branched. The radical leaves are lance-shaped to spoon-shaped, numerous, slender, finely downy. The stem-leaves are small, linear, erect. The flowers are small, yellow or greenish-white, in whorls, in long panicles, with opposite, tufted, racemose, many-whorled branches. The bracts are membranous. The flower-stalks are smooth. The calyx is faintly veined, inversely ovoid, smooth, the teeth blunt. The petals are linear, without scales, undivided, not crowned. The stamens and style project. The capsule is ovoid, and ruptures the calyx, being stalkless. The plant is 4-18 in. high, flowering in June and July, and is a herbaceous perennial.