Artemisia selengensis Turcz. ex Bess.

Artemisia selengensis Turcz. ; Besser, Nouv. Mem. Soc. Nat Mosc. 3: 50. 1834.
/l>-«emjs!a MmfecosaVerlot, Cat. Gr.Jard. Grenoble 1875: 12. 1875. Not A. Mm&>-ojo Turcz. 1834. Artemisia Verlotorum Lamotte, Assoc. Fr. Av. Sci. Compte Rendu 5: 513. 1877.
A stout perennial, with a rootstock; stem a meter high or more, striate, sparingly tomentose; lower leaves pinnately quinately divided to near the midrib, 1 dm. long or more, green or glabrate above, whitetomentose beneath; middle leaves temately divided and the uppermost entire; leaves or their lobes narrowly lanceolate, acuminate, usually entire, rarely few-toothed; heads numerous, paniculate; involucre about 4 mm. high and 3 mm. broad, sparingly floccose, soon glabrate; bracts 12-15, oval, obtuse, in 3 series, yellowish-green; ray-flowers 5-7; corollas 1.5 mm. long; disk-flow-ers 5-7; corollas brownish, glandular-puberulent, 2.5 mm. long, funnelform; achenes 1.5 mm. long.
Type locality: On islands of Selenga River, near Selenginsk, Transbaikal Siberia. Distribution: Near Portland, Oregon, probably escaped from cultivation; native of Siberia.