Rorippa Scop.

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 : 283

38. Rorippa Scop. 1

Annual to perennial herbs; glabrous or with unbranched hairs. Leaves simple to pinnate. Inner sepals saccate at base; petals yellow. Fruit a short siliqua or a silicula; valves veinless or with a weak median vein; style short; stigma slightly 2-lobed. Seeds more or less in 2 rows in each loculus. 1 Petals shorter than or equalling sepals

2 Inflorescence with numerous branches, forming a corymb 6. prolifera

2 Inflorescence not corymbose 5. islandica

1 Petals longer than sepals

3 Leaves entire, with conspicuous auricles 1. austriaca

3 Leaves ± divided, or without conspicuous auricles

4 Cauline leaves usually entire; fruits ovoid, less than half as long as the pedicel 2. amphibia

4 Cauline leaves ± divided

5 Basal leaf-rosette present at flowering time; cauline leaves usually auricled

6 Fruits 3-6 mm, broadly ellipsoidal 8. pyrenaica

6 Fruits more than 6 mm, lanceolate or linear-lanceolate

7 Fruits more than 10 mm, linear-lanceolate; petals

4-5 mm 9. lippizensis

7 Fruits 6-10 mm, narrowly lanceolate; petals 2-2-5 mm

10. thracica

5 Basal leaf-rosette withered at flowering time; cauline leaves not or only slightly auricled

8 Fruits 3 mm, ellipsoidal or almost spherical 7. brachycarpa

8 Fruits more than 5 mm, often linear

9 Fruits 5-6 mm; upper leaves ± sessile, not very deeply divided, sometimes entire 3. prostrata

9 Fruits usually more than 6 mm; upper leaves petiolate, pinnate or pinnatifid 4. sylvestris