Probably a variant of argemonia, from the classical name Argemone.
Erect, perennial, rhizomatous herbs. Leaves alternate, pinnate, generally aggregated towards the base of the stem. Leaflets 7-13, paired, deeply toothed, the large ones interspersed with much smaller ones; stipules large, stem-clasping, deeply toothed. Epicalyx absent. Flowers in a raceme, numerous, shortly stalked. Sepals 5 with numerous hooked bristles below. Carpels 2. Fruit mostly of 1 or 2 grooved achenes tipped with bristles and the persistent calyx.
Grown as a traditional medicinal herb garden plant for the spiring spikes of flowers.
About 15 northern temperate species.
Seeds and division.
Source of medicines and dye.
Leaves pinnate; flowers yellow, without an epicalyx.
Source: (2002). Rosaceae. In: . Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.