Scientific Name:
Alliaria petiolata (M.Bieb.) Cavara & Grande
Vernacular Name(s):
Garlic mustard

Biennial herb. Stem erect, sparsely hairy at base, becoming glabrous above, 40–70 cm tall. Lvs thin, glabrous above, with scattered hairs on veins beneath. Rosette and lower stem lvs reniform to ovate, cordate, obtuse to subacute, sinuate-dentate, (1.5)–3–8 × (2)–3.5–8 cm; petiole c. 2× length of lamina. Stem lvs similar, becoming triangular, truncate, coarsely dentate; petiole < lamina. Racemes 10–30 cm long at fruiting. Pedicels c. 5 mm long, slender at flowering, stout at fruiting. Sepals glabrous, ovate, 2–3 mm long. Petals white, 3–4.5 mm long. Siliques glabrous, spreading or slightly ascending, linear-cylindric, weakly torulose, (25)–35–50 × 1.5 mm; style 0.5 mm long. Seeds brown, finely longitudinally striate, 3–3.5 mm long.

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