On the identity of Justicia (Acanthaceae) with 3-verticillate leaves in southeastern Brazil, and a lectotypification
2024
Denise Monte Braz | Willa Cardoso de Araújo | Luís Adriano Funez
Abstract Justicia citrina, J. minensis, and J. trifoliata are species with 3-verticillate leaves in southeastern Brazil, a characteristic rarely found in the family and genus. In addition, they share other morphological similarities, such as the same habit, a dense terminal inflorescence, and a showy corolla. As a result, they are often misidentified in herbarium collections and in publications. An analysis of nomenclatural types, original descriptions, and other publications revealed distinctions between these species, the need for a lectotypification, and an improper citation of a misapplied name. The species are easily distinguished by their pilosity, inflorescences, color of the corolla, and shape of the anthers. We provide nomenclatural updates, certify the correct application of the name Justicia trifoliata, and distinguish the species with an identification key and diagnostic characters that are easy to observe in herbarium collections. Illustrations of types and photographs of plants in the field and other material examined are also included.
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