Sinapis L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 339

89. Sinapis L. 1

Annual or perennial herbs. Leaves pinnatifid or pinnatisect. Sepals patent, equal or subequal; petals yellow, clawed. Lateral

nectaries not prismatic. Fruit a siliqua with a long beak; valves distinctly 3- to 7-veined. Seeds in 1 row in each loculus, globose.

1 Siliqua with 8-17 seeds; beak cylindrical or conical, not or scarcely compressed

2 Ripe siliqua 25 mm or more, glabrous or with short, stiff, deflexed hairs 1. arvensis 2 Ripe siliqua not more than 25 mm, densely covered with long, fine, ascending hairs 2. pubescens 1 Siliqua with 4-8 seeds; beak strongly compressed

3 Fruiting pedicels usually 6-15 mm; petals more than 10 mm; sepals more than 4-5 mm; leaves variably covered with short, stiff hairs, but scarcely scabrid 3. alba 3 Fruiting pedicels usually 3-9 mm; petals less than 8 mm;

sepals less than 4-5 mm; leaves scabrid with short, stiff"hairs

4. flexuosa