Corydalis cornupetala is one of annual herbaceous species and belongs to Corydaceae. This spring ephemeral plant is also one of the Korean endemic plant species and ranged only at the Gyaejeongsub(woodland) in Gyeongsan City. The overall researches to this species due to limited distribution and life strategy has highly significant. The present study is to support the habitat conservation including single recovery plan based on information of site characteristics of the habitat, and flowering characteristics. The wild habitat of Corydalis cornupetala is typically ranged at 70m HSL with silt sandy loam on the southeast gently slope. The flowering time was slightly different by the year; 18 March in 2011, 6 March in 2012 and 8 March in 2013. The flowering period was gradually increased in the recent three years; 19 days in 2011, 29.2 days in 2012 and 32 days in 2013. The habitat of Corydalis cornupetala should be managed both by in situ and ex situ conservation. Regarding to this, the clear evidence is remained as individual number was gradually decreased as 186.51 in 2011, 182.64 in 2012 and 160.24 in 2013.