Publication: In N. L. Britton et al., N. Amer. Fl. 22: 387. 1908.
selected vouchers: WTU
Notes: FNA9: "Sanguisorba menziesii has sometimes been suggested to be a hybrid between S. officinalis and S. sitchensis. Some of its characteristics do suggest intermediacy and it is possible that it arose via hybridization, but it seems best to regard it as a species, as it forms populations separate from its possible parents and is fully fertile (P. S. Holloway and G. E. M. Matheke 2003)."