Clarification of the taxonomic identity, typification and nomenclature of Impatiens benthamii (Balsaminaceae)

Impatiens benthamii Steenis (Balsaminaceae) is re-collected from the type locality, Khasi Hills, Meghalaya, India, almost 60 years since it was last collected. The history and nomenclatural complexity of this little-known endemic species is discussed. A clarification of the distributional range of the species is given due to previous erroneous reports. To facilitate its proper identification, a detailed description based on live materials and colour photographs is provided. The characters of Impatiens benthamii are compared to those of closely related species. A lectotype is designated.