Tall rockcress
Cardaminopsis arenosa

Height: 15–30 cm (0.8–1.2 in.). Commonly many-branched, stem branching, lower part hairy, commonly reddish.

Flower: Corolla regular (actinomorphic), white–reddish (sometimes later turning purple), approx. 1 cm (0.4 in.) wide; petals four, 5–8 mm (0.2–0.32 in.) long. Sepals 4, with oval base. Stamens 6, of which 2 short and 4 long. Gynoecium fused, a single carpel. Inflorescence a raceme, extending in fruiting stage.

Leaves: Basal rosette and alternate on stem. Rosette leaf-blades pinnately lobed, hairy, underside commonly reddish, terminal lobe large, angular–roundish. Stem leaf-blades narrowly elliptic, with almost entire–large-toothed margins.