Bluegrasses (Poa L., Poaceae) of Sakha (Yakutia) Republic, an annotated checklist

Thirty four species of genus Poa L. are reported on the territory of Yakutia, two of them are represented by several subspecies. Poa sergievskajae Prob. and P. ochotensis Trin. are reported there for the first time, as well as four species – P. angustiglumis Roshev., P. attenuata Trin., P. subglabriflora Roshev., and P. trivialis L. were excluded, being erroneously reported previously. The key for identification and new species Poa orienti-sibirica sp. nov. is presented here. The new species is morphologically close to P. stepposa (Krylov) Roshev. and P. skvortzovii. It differs from P. stepposa by pilose rachilla, and from P. skvortzovii by a long, more than 1.8 mm, ligule.