Erysimum asperum (Hairy Western Wallflower)

30 (45)cm, Hairy Western Wallflower is a herbaceous perennial from western USA with upright hold stems with serrated, lanceolate leaves and topped by bright yellow flowers followed by finely pubescent seed capsules. Easily cultivated in any rich, well drained soil in a sunny spot. IV-VII.
20 seeds per package.