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 marshy places. The habit is grass-like. The stem is erect, weak, smooth, angular, the whole plant bluish-green (hence glauca), hairless, 4-angled. The leaves are narrow, stalkless, with even borders, linear-oblong to lance-shaped, acute, the lower broader. The flowers are few, distant, white, solitary, or in a loose, panicled cyme, or in the axils. The bracts are membranous. The petals are notched or divided into two, with linear segments, longer than the 3-nerved, lance-shaped sepals. The sepals are acute, with a broad membranous margin. The capsule is oblong to egg-shaped, as long as the calyx. The plant is 1-2 ft. high, flowering from May to August, and is a herbaceous perennial.
The habitat of this plant is shingle, rocky places, and the plant is local. The radical leaves are long-stalked, spoon-shaped, acute, the upper leaves less hairy, narrower. The flowers are white, the calyx narrower. It is a more slender plant than 5. nutans, of which it has been regarded as a variety. The plant is 1-2 ft. in height, flowering in June and July, and is a herbaceous perennial.
Italian Catchfly is found as an escape along roadsides. The plant has the catchfly habit, being more or less a rosette plant. It is downy, more or less erect. The branches are 3-forked, sticky, opposite. The radical leaves are lance-shaped, spoon-shaped, the stem-leaves linear to lance-shaped. The panicle is nearly erect, the flowers white, the calyx club-shaped, with blunt teeth, the petals divided into two nearly to the base, not crowned, with broad segments. The carpophore is as long as the capsule. The plant is 1-2 ft. high, flowering in June and July, and is a herbaceous perennial.
The habitat of this species is waste places. The plant is erect, bluish-green, sticky. The leaves are smooth. The panicle is many-flowered, forked, the flowers rose-colour, level-topped. The petals are notched, with a double, awl-shaped scale. The calyx is smooth. The capsule is club-shaped. The plant is 6-18 in. high, flowering from July to September, and is a herbaceous annual.
The habitat of this species is waste places. The stem is branched, spreading. The leaves are ovate, acute. The flowers are white. The calyx is bell-shaped, the petals distant. The fruit is fleshy. The plant is 1-2 ft. in height, flowering in June and July, and is a herbaceous perennial.
Common Chickweed (Stellaria media, Vill. = Alsine media, L.) - The habitat of this plant is gardens, fields, roadsides, cultivated and waste ground. The plant is prostrate, then ascending. The stem and branches have a hairy, alternate, lateral line, serving to convey water downward. The leaves are smooth, with broad leaf-stalks, fringed with hairs, ovate, short-pointed, the lower leaves stalked. The upper leaves are stalkless. The flowers are numerous, white, in cymes, axillary and terminal, the stalks longer than the calyx, the sepals ovate to lance-shaped, glandular, hairy, with a membranous border, smooth or with long hairs, the petals divided into 2 to the base. The fruit-stalks are wavy, bent-back, exceeding the leaves or not. The stamens are 3, 5, or 10. The seeds have round tubercles. The plant is 3-18 in. high, flowering from February to October, and is a herbaceous annual.