Corydalis dubia Prain (Fumariaceae), which is locally known as Re-skon, is an annual yellow flowering glabrous herb of lower stature arising from tuberous rootstock. This plant is endemic to
Bhutan, Sikkim (India) and Chumbi Valley of Tibet (Grierson and Long, 1984). In Bhutan, it occurs in
the wild in localized parts of Lingzhi and Bumthang region at an altitude range of 4294-5039 meters
above sea level (Wangchuk et al., 2008; Anonymous, 2008). It grows sparsely with recorded density of
0.6 to 3.6 plants/m2 (Anonymous, 2008).