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Issue: Vol. 702 No. 1: 22 May 2025
Type: Article
Published: 2025-05-22
DOI: 10.11646/phytotaxa.702.1.4
Page range: 61-71
Abstract views: 294
PDF downloaded: 14

Senna hatschbachii (Leguminosae, Caesalpinioideae): a newly discovered endangered species from the Brazilian Atlantic Forest

Programa de Pós-Graduação em Biologia Vegetal, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235, 50670-901, Recife, Pernambuco, Brazil
Departamento de Sistemática e Ecologia, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, Cidade Universitária, 58051-970, João Pessoa, Paraíba, Brazil
Laboratório de Taxonomia e Farmacobotânica, Departamento de Biotecnologia, Centro de Biotecnologia, Universidade Federal da Paraíba, Cidade Universitária, 58051-970, João Pessoa, Paraíba, Brazil
Cassiinae Fabaceae Senna sect. Peiranisia Senna ser. Interglandulosae Brazilian flora Eudicots

Abstract

Senna hatschbachii, a new species of Senna sect. Peiranisia ser. Interglandulosae, is endemic to Brazil and occurs in the Atlantic Forest of northern Paraná State. The species is described and illustrated here employing traditional taxonomic criteria based on collections from Brazilian herbaria. Morphologically, Senna hatschbachii is closely related to Senna multijuga var. lindleyana, although it differs by having linear stipules ≤ 0.1 mm wide, a subulate extrafloral nectary between the first pair of leaflets, and leaves with 6–13 pairs of leaflets (vs. setiform stipules with 0.2–0.4 mm wide, an ovoid to narrow-ovoid extrafloral nectary located between the first pair of leaflets and occasionally between subsequent pairs, and leaves with 15–46 pairs of leaflets in S. multijuga var. lindleyana). Its morphological and anatomical traits, identification key, geographic distribution, and habitat are discussed, along with a preliminary conservation assessment following IUCN Red List guidelines. In addition, we also provide a key for identifying tree taxa of Senna ser. Interglandulosae in Brazil.

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How to Cite

Souto, F.S., Queiroz, R.T.D. & Agra, M.D.F. (2025) Senna hatschbachii (Leguminosae, Caesalpinioideae): a newly discovered endangered species from the Brazilian Atlantic Forest. Phytotaxa 702 (1): 61–71. https://doi.org/10.11646/phytotaxa.702.1.4