Sanguisorba officinalis subsp. officinalis

Sanguisorba microcephala Presl, Epim. Bot. 202. 1849
Poterium officinale A. Gray, Proc. Am. Acad. 7 : 340, in part. 1868. Sanguisorba officinalis Howell, Fl. NW. Am. 1 : 170, mainly. 1898.
Glabrous perennial, with a rootstock; stem slender, 3-6 dm. high, simple or branched above ; leaves odd-pinnate, the lower with 9-13 leaflets ; lower stipules narrowly lanceolate, adnate to the petioles, the upper expanded above with a rounded foliaceous toothed blade ; leaflets oblong-ovate, 1-4 cm. long, 1-2.5 cm. wide, rounded at the apex, cordate at the base, dark-green above, paler beneath, serrate with ovate mucronate teeth ; spike roundedelliptic to oblong-cylindric, dense, 1.5-2.5 cm. long, 10-15 mm. thick; bracts ovate, pubescent, shorter than the buds; sepals dark-purple, oval, 2-2.5 mm. long ; filaments filiform, about 3 mm. long ; fruiting hypanthium pubescent, rounded-ellipsoid, narrowly 4-winged.
Type locality : Nootka Sound.
Distribution : Mountain marshes from Alaska and Yukon Territory to California.