Abstract
Orthosiphon incurvus (Lamiaceae) is a morphologically variable taxon distributed across the Himalaya & Indo-Myanmar region and its infraspecific boundaries have been interpreted inconsistently throughout the literature. The present study resolved the O. incurvus taxonomic complex and recognized two distinct varieties, i.e. var. incurvus and var. elata. The names of both taxa are lectotypified in order to stabilize their nomenclature, on the basis of specimens preserved at K.
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