Synopses of vascular plant species and subspecies, registered in two forestries of the Katon-Karagay State National Nature Park (the Republic of Kazakhstan) are presented. A total of 393 species/subspecies were registered in the Archatinskoe Forestry and 383 taxa were found in the Chernovinskoe Forestry. Nine taxa have been included in the List of Rare and Endangered Plant Species of the Republic of Kazakhstan: Huperzia selago (L.) Bernh. ex Schrank et Mart., Paeonia anomala L., P. hybrida Pall., Rheum altaicum Losinsk., Rhodiola rosea L., Fornicium carthamoides (Willd.) Kamelin (= Rhaponticum carthamoides (Willd.) Iljin.), Lilium pilosiusculum (Freyn) Miscz. (= L. martagon L.), Erythronium sibiricum (Fisch. et C.A. Mey.) Krylov, and Dactylorhiza fuchsii (Druce) Soó.