Dear Ivan
I suppose that "freshest" checklist on Mongolian Flora is:
Gubanov I.A. Conspectus of Flora of Outer Mongolia (Vascular Plants)-
- Ed. by R.V.Kamelin -
Moscow, "Valang", 1996. - 136 c. (in Russian)
[2823 species and subspecies]
Sergei A. Balandin
Vice Head of Geobotany Department
Moscow State University
balandin at herba.msu.ru