Background: Thesium brevibracteatum P.C.Tam was described, based on the specimen L.C.Chiu 5128 collected from Inner Mongolia, China. The name Thesium brevibracteatum Sumnev. is validly published and described for the type (Korotkova E. E. et Titov V. S. 1502) collected from Uzbekistan. T. brevibracteatum P.C.Tam is a later homonym of T. brevibracteatum Sumnev.
New information: We propose T. longiperianthium as the replacemen name for T. brevibracteatum P.C. Tam.
Keywords: Inner Mongolia; Thesium brevibracteatum; homonym; replacement name.
Xuehong Xu, Wenjun Li, Khabibullo F Shomurodov, Ozodbek Abduraimov, Shukui Niu.