Polygonum frutescens, spec. nov.

1. Polygonum caule fruticoso, calycinis foliolis duobus reflexis. Hort. ups. 95.

Atraphaxis inermis, foliis planis. Hort. cliff. 138. Roy. lugdb. 209.

Lapathum orientale, frutex humilis, flore pulchro. Tournef. cor. 38.

Lapathum dauricum montanum fruticans, ramis late sparsis. Amm. ruth. 227.

Habitat in Sibiria, Dauria. ♄

* Bistorta spica unica.