Ecologo-geographical research of Poa botryoides (Trin. ex Griseb.) Kom. (Poaceae)

Poa botryoides (Trin. ex Griseb.) Kom. is a predominantly Siberian mountain-steppe species, occupying an intermediate position between P stepposa (Kryl.) Roshev. and attenuata Trin., from which it poorly isolated morphologically. A digital map of distribution was compiled, based on 143 localities, revealed herbarium materials reliable literary sources; the ecologo-climatic niche this species constructed basis 19 climatic parameters. The histograms similarities precipitation plots driest quarter coldest quarters, as well wettest warmest quarters. This can be explained by high correlation season amount precipitation. Two-dimensional “climatic envelopes” both for average annual values temperature precipitation, during growing season, showed spread values, number individuals in atypical conditions. Maps reflecting spatial location these “atypical” points that most them are located humid regions Far East, makes us pay more attention to P. samples collected territories.