Cardamine tenuifolia

Elongate, glabrous perennial, to 50 cm or more high, often with numerous fine fibrous roots arising from lower stems; stems weak, trailing. Leaves predominantly cauline and more than 6, to 6 cm long (lower leaves not persisting), pinnate with 1–5 pairs of lateral pinnae, terminal and lateral pinnae filiform. Racemes lax; sepals 2.5–4(–5) mm long; petals (5–)7–12 mm long, white; mature style mostly 2–4 mm long. Fruits erecto-patent to spreading, 20–40 mm long, c. 1.5 mm wide; pedicels to 30 mm long; seeds c. 1.5 mm long. Flowers late spring–summer.