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.
Erect. Stem branched, smooth. Lower leaves runcinate-pinnatifid; lobes toothed oblong, terminal, angular. Upper lanceolate with hastate terminal lobe. Flowers yellow. Flower-stalks slender. Pods round in section, erect, four times as long as the stalks. Seeds oblong. 1-2 ft. June-August. Herbaceous annual.
Erect. Stem rigid. Leaves lanceolate, narrowed at base, entire, slightly toothed, with 3-partite stellate hairs. Flowers yellow. Flower-stalks exceeding calyx, much shorter than pods. Pods more or less erect. Seeds many, small. 6 in.-2 ft. June-August. Herbaceous annual.
Spreading. Leaves lanceolate, repand-toothed. Hairs simple. Flowers pale - yellow. Pods square, blunt, spreading. 6 in.-1 ft. June-August. Herbaceous perennial.
Erect. Stem simple, round in section. Radical-leaves obovate, blunt, entire, smooth, glaucous. Cau-line ovate-cordate, blunt, clasping. Flowers cream-coloured. 1-2 ft. June-September. Herbaceous annual.
Radical-leaves more or less hairy, not glaucous. Cauline smooth, bluish-white. Flowers bright-yellow. 1-3 ft. May-July. Herbaceous biennial.
Radical-leaves glaucous. Root tuberous, with elongated neck. Flowers pale-buff. 1-3 ft. March-September. Herbaceous biennial.
Leaves bluish-white. Root slender, spindle-shaped. Flowers yellow. 1-3 ft. June-August. Herbaceous biennial.
Erect. Lower leaves large, lyrate, rough; terminal lobe large-lobed. Upper linear-lanceolate, entire, smooth. Pods appressed, square, smooth, beak awl-shaped, short, sterile; valves 1-veined. 1-4 ft. June-August. Herbaceous annual.
Chief differences from last: - Stem rough, with turned-back hairs. Pods spreading, cylindrical, knotty, roughly hairy. Valves 5-veined, not as long as sword-shaped beak, which is sometimes i-seeded. 1-3 ft. June-August. Herbaceous annual.
Leaves deeply pin-natifid. Flowers whitish-yellow, with bracts at base of raceme. Pods spreading, linear, 1-nerved. 1-2 ft. June-August. Herbaceous annual.
Erect. Stem branched. Leaves oblong, clasping, toothed, lower stalked. Flowers numerous, small, white, on long stalks in corymbs. Style as long as dissepiment. Pod heart-shaped. 1-2 ft. May. Herbaceous perennial.
Erect. Lower leaves 1-2-pinnatifid; upper linear, entire, sessile. Flowers white. Pouch round-oval, blunt. 6-18 in. June-August. Herbaceous annual.