Erysimum aureum, Bieb.

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 : 273

27. E. aureum Bieb. , FI. Taur.-Cauc. 2: 117 (1808)

(incl. E. sylvaticum Bieb. ).

Biennial 40-100 cm; hairs nearly all stellate. Lower leaves elliptic-oblong or lanceolate-elliptical, green, sinuate-denticulate to serrate; cauline distinctly petiolate. Pedicels 6-15 mm in fruit, patent or deflexed. Sepals 4-5-6 mm, saccate at base; petals 8-12 x c. 3 mm, golden-yellow, pubescent on back; anthers 1-5-2 mm. Siliqua 20-50 x 1-2 mm, more or less square in cross-section, grey-green, patent or deflexed; style 1-5-3 mm. Seeds c. 1-5 mm. C. & S. Russia, Ukraine. Rs (C, W, E). The European plant is usually called E. sylvaticum Bieb. , FI. Taur.-Cauc. 3: 441 (1819), which is said to differ from 27 only in having the style 2-3 mm not (0-5-) 1-5-2 mm. This distinction has not been confirmed on the material seen.