You selected Sanguisorba canadensis var. media (DC.) Maxim. This is an ambiguous synonym for:

Accepted scientific name:
Sanguisorba obtusa Maxim. (accepted name) 1 literature reference for Sanguisorba obtusa Maxim.
Synonyms: -
Infraspecific taxon: Sanguisorba obtusa var. albiflora Makino
Sanguisorba obtusa var. amoena Jesson
Sanguisorba obtusa var. contraria Koidz.
Sanguisorba obtusa var. contraria Koidz.
Sanguisorba obtusa var. typica Makino
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Rosales
Family Rosaceae
Genus Sanguisorba
Distribution: -
Additional data: -
Source database: IOPI-GPC, 10.0, Aug 2007
Latest taxonomic scrutiny: R. Pankhurst, 2009
Online resource: -
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:2b44bff0-60a7-102d-be47-00304854f810:ac2010