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 borders of cultivated fields, fields, and waste places. The habit is erect or prostrate below. The stem is much-branched, downy, finely furrowed. The leaf segments are downy, linear, meeting. The flowerheads are broad, the flower-stalk long, swollen above. The receptacle is conical. The disk has yellow florets, the ray florets white, with scales with a blunt point, and exceeding the disk florets, which are flat. The involucral bracts are blunt, with a membranous border, the inner ones torn. The achenes are smooth, ribbed, blunt. The plant is 6-24 in. high. It flowers from June to August, and is a herbaceous annual.
The habitat of this plant is cultivated and waste ground. The habit is similar to that of the last. The plant is strong-scented, unlike the latter. The branched stem is erect, and the whole plant is smooth. The leaves have twice-divided leaves, with lobes each side of a common stalk. The lobes are linear, narrow, simple or divided. The flowerheads are solitary or in a corymb, on long stalks. The receptacle is conical, lengthening, and hollow. The involucral bracts have no dark border, and are linear. The disk florets are yellow, the disk oblique, the ray florets whiter. The ligule is turned back in fruit. There are no scales between the florets. The fruit is 5-ribbed, on one side, small and grey, the ribs white and slender. The plant is 12-18 in. in height, flowering in June and July, and is a herbaceous annual.
This plant is a casual in clover fields and on cultivated ground. The habit is erect. The stem is furrowed and angular, the whole plant erect. The lower leaves have the lobes turned back, arranged each side of the common stalk, toothed, the stem leaves arrow-shaped, strap-shaped, clasping, entire, or toothed below. The upper part of the flower-stalk and involucral bracts is covered with stiff bristles, slender, not thickened. The buds are erect. The inner slender, rigid, keeled bracts do not enclose the outer fruits. The outer are awl-like. The flowerheads are yellow, bell-shaped. The fruit is slender with a long beak. The plant is 1-3 ft. high, and flowers in July and August, being a herbaceous biennial.