Polygonum subaphyllum Sumnev. – a new species in the flora of Russia

Abstract

Polygonum subaphyllum is reported here as a new species for the flora of Russia based on collections from several Siberian regions (Novosibirsk Region, Altai Territory, Trans-Baikal Territory and Republic of Sakha (Yakutia)) revealed among the materials of NS and KRAS. In Siberia, Polygonum subaphyllum grows in solonetzic steppes, on sands, on agricultural fields and along the roads. It belongs to Polygonum sect. Polygonum subsect. Patula (Polygonaceae). The key for identification of Siberian species of subsection Patula (P. subaphyllum, P. novoascanicum and P. patulum) is given.