Annual Burnet, Prairie Burnet, Western Burnet: Poteridium occidentale (Synonyms: Poteridium annuum, Sanguisorba annua, Sanguisorba occidentalis) - Annual or biennial herb with strong taproot and freely branched. Leafy stems from 20-60 cm high. Leaves pinnately compound and 3-8 cm long with up to 17 leaflets or segments which are narrowly linear. Inflorescence an ovoid to cylindrical spike up to 30 mm long and 7-7 mm thick.
Burnet Bloodwort, Fodder Burnet, Garden Burnet, Small Burnet: Poterium saguisorba var. polygamum (Synonyms: Poterium balearicum, Poterium polygamum, Poterium sanguisorba ssp. muricatum, Sanguisorba minor, Sanguisorba minor ssp. balearicum, Sanguisorba minor ssp. muricata) - Native of Europe. Perennial herb with simple to branched stems from 20-60 cm high. Leaves basal and on stem, the latter almost as large as the former. Leaves pinnately compound with 9-17 oval to ovate-oblong leaflets, each 1-2 cm long. Leaflet margins coarsely toothed. Inflorescence a spherical to ovoid spike from 8-20 mm long and 10 mm thick. Found on Lummi Island northwest of Bellingham, WA and near Bingen, WA.
Menzie's Burnet, Small-head Burnet: Sanguisorba menziesii (Synonym: Sanguisorba media)
Garden Burnet, Great Burnet: Sanguisorba officinalis (Synonyms: Poterium officinale, Sanguisorba microcephala, Sanguisorba officinalis ssp. microcephala) -
Broad-leaved Burnet, Sitka Burnet: Sanguisorba stipulata (Synonyms: Sanguisorba canadensis, Sanguisorba canadensis ssp. latifolia, Sanguisorba canadensis var. latifolia, Sanguisorba canadensis var. sitchensis, Sanguisorba sitchensis) -