New octoploid Catabrosa (Poaceae) species from Altai

Two new species of the genus Catabrosa (Poaceae) are described from Altai, Russia. The species Catabrosa ledebourii Punina & Nosov is widespread in South Siberia and C. bogutensis Punina & Nosov is an endemic species. Both species are octoploid and this is the first demonstration of the chromosome number 2n = 40 in the genus Catabrosa.