Gastrochilus flabelliformis (Blatt. & McCann) C.J.Saldanha (Epidendroideae: Vandeae: Aeridinae), an addition to the orchid flora of Sri Lanka, with taxonomic notes on Gastrochilus dasypogon (Sm.) Kuntze

Gastrochilus flabelliformis (Blatt. & McCann) C.J.Saldanha is added to the orchid flora of Sri Lanka from the lowland intermediate zone and G. obliquus (Lindl.) Kuntze is omitted from the list. A detailed taxonomic description, color plates, and line drawings with habitat ecology and distribution are provided for the former. Taxonomic notes on the identity of true Gastrochilus dasypogon (Sm.) Kuntze are also discussed in this paper, resulting in the merger of G. acutifolius (≡S. acutifolium), G. denticulatus (≡S. denticulatum), and G. dentatus (≡S. dentatum) under the synonymy of the former.