Scientific Name:
Barbarea verna (Mill.) Asch., Fl. Brandenburg 36 (1860)
  • Erysimum vernum Mill. (1768)
  • = Erysimum praecox Sm. (1804)
  • Barbarea praecox (Sm.) W.T.Aiton (1812)
Vernacular Name(s):
American cress; Upland cress

Biennial, sometimes short-lived perennial. Stems branched above, (20)–40–60–(90) cm tall. Rosette lvs deeply lyrate-pinnatifid, sparsely hairy, especially on petiole and margins, or glabrous, (3)–7–25 × (1)–2–6 cm; terminal lobe ovate to oblong; lateral lobes in (4)–5–8 or more pairs, the distal pair usually > width of terminal lobe; margins entire, sinuate, toothed or lobed. Upper stem lvs deeply pinnatifid with deflexed lobes at base; terminal lobe narrow-oblong or cuneiform, usually 3-lobed or 3-fid; lateral lobes in (1)–2 pairs, linear. Racemes to 30 cm tall; pedicels erecto-patent at fruiting, c. 5 mm long. Sepals glabrous, 3–4 × 0.8–1.5 mm. Petals 6–8 × 2–3 mm. Silique erecto-patent, (30)–40–70 × 1.5–2.5 mm; style 1–1.5 mm long.

[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]


Flowering: (Aug.)–Oct.–Dec.–(May); Fruiting: (Aug.)–Oct.–Dec.–(May)