Lysionotus bijantiae is identified as a new synonym of Henckelia oblongifolia (Gesneriaceae).

A recently described new species of Gesneriaceae, Lysionotus bijantiae D. Borah & A. Joe, was misidentified, it is conspecific with Henckelia oblongifolia (Roxb.) D. J. Middleton & Mich. Möller. We treat Lysionotus bijantiae as a new synonym for Henckelia oblongifolia [ previous Chirita oblongifolia ( Roxb.) Sinclair] by examining relevant specimens and literature. The type specimens of Lysionotus bijantiae were collected from the southern slope of the Himalayas in Southeast Xizang, China. The diversity of Gesneriaceae in this area is also abundant. The authors attributed it to the genus Lysionotus because of its flower with two stamens, and compared it with other Lysionotus species because of its calyx 5, lobed above the middle, but they ignored the fact that the seed apex had no appendages. We observed that the seeds of this species in the populations of Motuo and the type localities both had no appendages by scanning the seeds with electron microscope, it is confirmed that this species is not a species of Lysionotus, but a species of Henckelia. At the same time? we offer the color images (including seeds scanned images) and the lectotype of Henckelia oblongifolia, and also describe the characteristics and distinguishing methods of the two genera Henckelia Spreng. and Lysionotus D. Don, in order to provide a reference for species identification of the two genera and avoid more confusion of species classification. [ABSTRACT FROM AUTHOR]