Erysimum cheiranthoides L.
treacle mustard
Annual, sometimes overwintering, herb. Hairs appressed, medifixed, sometimes stellate. Stems erect, up to 1 m tall. Rosette lvs simple, oblong-lanceolate, acute, shortly stalked, distantly toothed, hairy, 2-10 × 0.5-3 cm. Stem lvs narrower, smaller, becoming sessile. Racemes 10-30 cm long. Sepals hairy, 2-3 × c. 0.5 mm. Petals yellow, 4-6 × 2-3 mm. Silique 4-angled, slightly curved, 10-25 × c. 1.2 mm, erect on erecto- patent pedicel 5-10 mm long. Seeds brown, shortly winged at apex, 1-1.2 mm long.
S.: S. Otago (Balclutha and Waitepeka).
Europe 1979
A weed of cultivated fields.
FL Jan Jan-Mar.
