Corydalis sewerzowii

Corydalis sewerzowii Regel is a species from northeast Iran, Afghanistan and adjacent countries. In has yellow flowers and biternate leaves (the three primary leaves were again divided into three.) Height range: 30-45 cm. IPNI and World Flora Online in 2025 have a different spelling, Corydalis sewerzowi Regel, but Plants of the World Online shows it as an accepted species and there are photos of it on iNaturalist. More confusing, **Corydalis sewerzowii var. simplicifolia** Fedde is considered by both Plants of the World Online and World Flora Online to be a synonym of Corydalis aitchisonii. But that name is not in IPNI. Photograph by John Lonsdale of a plant he grew under the name Corydalis sewerzowii.