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.
Stems several, branched below, central one erect, rest spreading. Leaves hairy, toothed; lower obcordate, stalked; upper lanceolate, clasping. Flowers white. Anthers violet. Pods ovate, notched. Style twice as long as notch. 6-12 in. June-August. Herbaceous perennial.
Differences from V. arvensis, L.: - No rootstock. Leaves oblong, scalloped. Flowers purple and yellow. Petals longer than sepals. 4-12 in. April-September. Herbaceous annual.
Glaucous. Erect. Stem much branched above. Leaves ovate-oblong', sessile, clasping. Flowers rose-coloured. Calyx 5-angled. 9 in.-2 ft. July-September. Herbaceous annual.
Prostrate-ascending, smooth, fleshy. Stem branched. Leaves alternate. Flowers yellow, terminal, sessile. 6-18 in. June-August. Herbaceous annual.
Climbing. Leaflets linear, acute. Tendrils branched. Flowers blue with white markings, in a long spike. Limb of standard long. Pods linear-oblong. 2-4 ft. June. Herbaceous annual.
Prostrate-ascending. Leaflets lanceolate, with spreading villous hairs. Flowers purple. Limb of standard long. Pod rhomboid-elliptical. 1-3 ft.June-August. Herbaceous annual.
Prostrate. Stems not tufted. Leaflets oval. Flowers yellow. Standard and pod hairy. 6 in.-2ft. June-August. Herbaceous perennial.
Creeping. Leaves dark-green above, white below. Flowers white, i-if in. Fruiting calyx erect. 6-10 in. May-July. Herbaceous perennial.
Leaves ternate, digitate, leaflets linear-lanceolate, coarsely serrate, blunt-pointed. Flowers white. 1-2 ft. July. Herbaceous perennial.
Rootstock branched. Leaflets yellowish-green, smooth, long-pointed. Flowers white. Fruit yellowish. Herbaceous perennial.
Leaves and stems bright-green. Leaflets sessile, decurrent; terminal leaflet 3-fid. Calyx-teeth minute. Flowers white, in large terminal umbels of 30-40 rays. 2-6 ft. July. Herbaceous perennial.
Erect. Stem not spinose. Lower leaves heart-shaped, 3-lobed below, coarsely toothed. Flower-heads greenish. Involucre downy. Fruit oval, with two beaks, straight, hooked at tip. 1-2 ft. July. Herbaceous annual.