Erysimum rhaeticum (syn. E. helveticum)

20 (30)cm, rarely seen perennial with numerous bright sulphurous yellow, fragrant yellow flowers above linear leaves. Native of rocky, grassy slopes and rock crevices in the Alps, the Apennines, the Balkan, and the Pyrenees growing at up to 2.800m. For a sunny location in any rich, well drained, rocky soil. III-V.
20 seeds per package.