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Issue: Vol. 718 No. 1: 16 Sept. 2025
Type: Article
Published: 2025-09-16
DOI: 10.11646/phytotaxa.718.1.5
Page range: 50-58
Abstract views: 609
PDF downloaded: 14

Lobelia bahiana (Campanulaceae, Lobelioideae), a new narrow endemic species from Chapada Diamantina, Northeastern Brazil

Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul, 91501-970, Brazil
Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul, 91501-970, Brazil; Universidade Federal de Pelotas, Instituto de Biologia, Campus Universitário Capão do Leão, Caixa Postal 354, Pelotas, Rio Grande do Sul, 96010900, Brazil
Laboratório Integrado de Sistemática Vegetal, Departamento de Botânica, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Rio de Janeiro, Rio de Janeiro, 21941-590, Brazil; Programa de Pós-Graduação em Ciências Biológicas (Botânica), Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
Laboratório Integrado de Sistemática Vegetal, Departamento de Botânica, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Rio de Janeiro, Rio de Janeiro, 21941-590, Brazil
Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul, 91501-970, Brazil
Asterales Bahia Caatinga Cerrado Lobelia sect. Rhynchopetalum Eudicots

Abstract

Lobelia bahiana is here described as a new species endemic from the Chapada Diamantina region in Bahia state, Brazil. The new taxon belongs to Lobelia section Rhynchopetalum, the most speciose clade of Lobelia in Brazil. This section includes tall robust herbs with unbranched stems and typical unilabiate or sub-bilabiate corolla tubes. Lobelia bahiana looks morphologically similar to L. organensis, but can be distinguished from it by the dense tomentum on the abaxial surface of leaves, peduncles and rachis of the inflorescences and in the pedicels of flowers (vs. glabrous), by the strong purple color in calyx lobes and hypanthium (vs. greenish), and by the erect calyx lobes, which are bent towards the flower apex (vs. patent, not curved). The new species shares also similarities with Lobelia brasiliensis, being distinguished mainly by the white tomentum (vs. yellowish) and the glabrous ovary and outer surface of corolla (vs. densely tomentose). A full description together with a distribution map, original photographs and line drawings are provided. In addition, a key for the South American species of Lobelia sect. Rhynchopetalum as well as the inclusion of L. bahiana under the vulnerable (VU) category of the IUCN Red List due to its narrow distribution and a restricted area of occupancy are proposed.

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How to Cite

Coelho, G.P., Iganci, J.R.V., Rollim, I.D.M., Trovó, M. & Miotto, S.T.S. (2025) Lobelia bahiana (Campanulaceae, Lobelioideae), a new narrow endemic species from Chapada Diamantina, Northeastern Brazil. Phytotaxa 718 (1): 50–58. https://doi.org/10.11646/phytotaxa.718.1.5