The <Emphasis Type="Italic">Corydalis nana</Emphasis> complex (Fumariaceae sect. Latiflorae) in Western Himalaya

Corydalis nana Royle in the western Himalaya is found to be a complex of three species, including two hitherto undescribed. The true C. nana is a yellow-flowered species. The most common, greyish-blue or white-flowered species in the Sino-Indo-Nepal Himalaya, hitherto mistaken as C. nana, is a new species described here as Corydalis magni. An additional related species, Corydalis devendrae, characterised by tuberous roots and dorsally wingless/non crestate upper and lower petals is also described and illustrated from Uttarakhand state, India. A table comparing diagnostic characters, along with keys to taxa of the complex and a distribution map, are also included.