A new species of Ladenbergia (Rubiaceae) has been found in the Cordillera de Sira in the eastern Andes of central Peru. It is here described as Ladenbergia siranensis, and it is morphologically similar to L. acutifolia, L. graciliflora and L. shawistigma. It differs from these by a shrubby habit, coriaceous, narrowly elliptic leaves, few-flowered inflorescences, the hypanthium hirtellous outside, small and deeply lobed calyx, a glabrous style, and fruits with reddened hirtellous pubescence. A key to these four species is provided.
Bibliographical noteFunding Information:
We thank Charlotte M. Taylor and two anonymous reviewers for valuable comments that helped improve the final version of the manuscript; the curators of all herbaria cited in for access to specimens, Claes Persson, Bruno Wallnöfer, Joao A. M. Carmo, André V. Scatigna, Robin Fernandez Hilario and Elluz Huáman for their collaboration in the preparation of the manuscript; Armin Niesner, Julio Monzón, Carlos Vasquez BMoro^, Clever Llagas and Estación Biológica Panguana for assistance and collaboration in the field; and Klei Souza for the excellent illustration. The first author thanks CAPES for a Ph.D. scholarship.
- outlying range
- sclerophyllous vegetation