Lamium galeobdolon (L.) L.

Stoloniferous herb, sometimes forming mats. Stems densely hairy on the angles, purplish. Petioles to c. 8 cm long, slender, hairy. Lamina 3–8 × 2.5–6 cm, sometimes smaller near base of shoots, ovate, or broad-ovate, often rhombic-ovate on flowering stems, with hairs scattered above, more densely hairy below, coarsely crenate or crenate-serrate, with large pale silvery greyish areas on either side of midrib above; base truncate or subcordate; apex ± obtuse. Calyx 8–10 mm long, hairy. Corolla 2–2.5 cm long from base to apex of upper lip, yellow, hairy outside; upper lip 1.2–1.4 cm long, elliptic; lower lip with middle lobe c. 7 mm long, narrow-triangular, streaked brown, acute; lateral lobes rounded. Filaments puberulent, the longer pair > style. Nutlets not seen.

[From: Webb et al. (1985) Flora of New Zealand. Volume 4 as Galeobdolon luteum Huds.]