Glaucium flavum Crantz

Biennial or perennial starting as a tufted rosette; stems stout, glabrous, glaucous, erect or ascending, 20–30–(50) cm tall. Lvs glaucous. Lower lvs obovate; lamina 2-pinnatifid or pinnate, petiolate, hairy on both surfaces, (10)–15–30–(50) × (3)–5–10 cm; leaflets lobed or toothed. Upper lvs smaller, ovate to triangular, shallowly pinnatifid or lobed, sessile, amplexicaul, sparsely to densely hairy above, glabrous or sparsely hairy beneath. Pedicel stout, glabrous, 1–2 cm long. Sepals sparsely to densely hairy, 2–3 × c. 1.5 cm. Petals yellow, broadly obovate, c. 3 × 4 cm. Capsule tuberculate throughout length but not hairy, often curved, (150)–200–300 × 4–7 mm.

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

Flowering: Nov.–Mar.; Fruiting: (Nov.)–Dec.–Apr.