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 cornfields, ballast hills, the former sandy and chalky. The stem is trailing, downy, with short and long hairs, short-stalked. The leaves are egg-shaped, nearly rounded, downy. The flowers are yellow, large, the upper lip chocolate or purplish-brown. The spur is curved, at right angles to the tube. The flower-stalk is hairy. The fifth stamen is a small scale. The capsule is nearly round. The seeds are deeply pitted. The plant is 4-15 in. in height, and is in flower from July to October, being a herbaceous annual.
The habitat of this plant is cornfields. The habit is prostrate. The short hairy stem bears long, trailing branches, with shortly-stalked leaves, the lower egg-shaped, the upper arrow-shaped. The flowers are as in the last, but not so large. The flower-stalks are hair-like, curved above, longer than the leaves. The sepals are lance-shaped. The capsule is round, the seeds as in the last. The plant is 6 in. to 2 ft. long, and flowers from July to October, being a herbaceous annual.
The habitat of this plant is cornfields, fields, cultivated ground, railway ballast, sidings, etc. The plant is erect in habit. The stem is slender, branched, glandular, downy, clammy. The leaves are alternate, linear, lance-shaped, blunt, the radical leaves almost spoon-shaped. The flower-stalks are in the axils longer than the leaves. The flowers are single, the corolla about as long as the calyx, with linear, oblong sepals. The flowers are small, and dull-yellow. The capsule is swollen below, opening by pores, the seeds furrowed, oblong. The plant is 4-15 in. in height. It flowers in May up till October, and is a herbaceous annual.
The habitat of this plant is cultivated ground, fields, and waste places, or the wayside. The habit is prostrate. The stem is downy, with slender branches, the leaves stalked, blunt, toothed, with regular, shallow teeth, heart-shaped, as long as the flower-stalks. The flowers in the axils and solitary, the lower petal white, are pale-blue. The sepals are fringed with hairs, oval, oblong, blunt, 3-nerved in fruit, unequal. The capsule is hairy, cells 2-lobed, 4-5-seeded, the hairs straight, glandular. The plant is 4-8 in. in length. It flowers between April and September, or later, and is a herbaceous annual.
This plant is an alien, found on cultivated ground, in fields, and waste places, especially gardens. The habit is prostrate. The long, much-branched stems, with ascending tips, are hairy, and the leaves are stalked, shining, broadly egg-shaped to heart-shaped, with 5-6 rounded lobes, toothed and bent. The leaf-stalk is enlarged above. The flower-stalks are longer than the leaves. The flowers are solitary, in the axils, pale-blue, larger than in V. agrestis or V. polita. The sepals are lance-shaped, acute, in front. The capsule consists of 2 spreading lobes, flattened above, with a sharp keel, net-veined, downy, glandular, with 5-8 seeds, and are twice as broad as long. The plant is 6-12 in. in height, and flowers between April and October, or later, being a herbaceous annual.
The habitat of this plant is cornfields, cultivated ground, and dry banks. The habit is erect. The stem is branched, covered with short, stiff hairs, bluntly angled, stout, rather rough. The leaves are lance-shaped, linear, acute, with a rough edge, somewhat downy both sides, and entire. The bracts are purple, broadly lance-shaped, with long, slender, acute teeth, divided to the base. The segments are awl-shaped. The flowers are rose colour, with a yellow throat, and dark-pink, closed lips, the tube curved, in loose, conical spikes. The corolla is longer than the calyx, with long, slender teeth. The capsule is egg-shaped, not so long as the calyx, 1-seeded. The plant is 9-24 in. in height, flowering from June to September, and is a herbaceous hemi-parasitic annual.