This poppy is a perennial that spreads via rhizomes, typically no taller than 30 cm. The pinnate leaves usually have five soft green leaflets, although three and seven occur as well, each with a shape ranging from lanceolate-oblong to rhombic, and a pattern of distinct teeth along the margins. The flowers are bright yellow 3.5-5 cm across, starting out bowl-shaped, then flattening out with age.
Its typical habitat is moist shaded woodland, growing in accumulated humus.
Although generally considered a monotypic genus, the species is somewhat variable, and several variations have been named as separate species.
- Christopher Grey-Wilson, Poppies (Portland: Timber Press, 2000) ISBN 0-88192-503-9 pp. 40-41
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