Publication: N.W. Fl. 109. 1912.
selected vouchers: WTU
Notes: FNA26: "The North American plants, usually referred to var. brevipes (N. C. Fassett 1935), differ from the typical Asiatic ones in lacking leaf-margin ciliation (F. H. Utech and S. Kawano 1975, 1976b; H. Takahashi 1976)."