Description from Flora of China
Decaneurum Schultz Bipontinus, Tanaceteen, 44. 1844, not Candolle (1833).
Herbs, perennial, with procumbent rhizomes; indumentum absent or of basifixed and medifixed hairs. Leaves alternate, entire or pinnatipartite. Synflorescence a lax, ± flat-topped cyme, often reduced to solitary capitulum. Capitula heterogamous, radiate. Involucre coryliform; phyllaries in 2 or 3 rows, scarious margins brown or dark brown. Receptacle convex, epaleate. Marginal florets in 1 row, female, usually sterile; lamina white or reddish. Disk florets many, yellow, bisexual; corolla tubular, apex 5-lobed. Anther bases obtuse, apical appendage ovate or elliptic-ovate. Style branches linear, apex truncate. Achenes distinctly 8-12-ribbed, with apical rim. Corona absent.
Two species: China, Japan, Korea, Russia; Europe; one species in China.
(Authors: Shi Zhu (石铸 Shih Chu); Christopher J. Humphries, Michael G. Gilbert)