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Issue: Vol. 722 No. 1: 10 Oct. 2025
Type: Article
Published: 2025-10-10
DOI: 10.11646/phytotaxa.722.1.6
Page range: 65-73
Abstract views: 289
PDF downloaded: 13

Narrowing the geographic gap between the disjuncts Aristolochia subsect. Pentandrae and the A. lindneri group (Aristolochiaceae): new records of A. pentandra and A. stuckertii in Brazil

Instituto Nacional da Mata Atlântica, Av. José Ruschi, 04, Centro, 29650-000, Santa Teresa, Espírito Santo, Brazil
Instituto Nacional da Mata Atlântica, Av. José Ruschi, 04, Centro, 29650-000, Santa Teresa, Espírito Santo, Brazil; Programa de Pós-graduação em Evolução e Diversidade, Universidade Federal do ABC, Av. dos Estados, 5001, Bangu, 09210-580, Santo André, São Paulo, Brazil
Universidad Nacional de Colombia, Facultad de Ciencias, Instituto de Ciencias Naturales, AA 7495, Bogotá, Colombia
Royal Botanic Gardens Kew, Richmond, Surrey TW9 3AE, UK
Programa de Pós-Graduação em Botânica, Universidade Estadual de Feira de Santana, Av. Transnordestina s/n., 44036-900, Feira de Santana, Bahia, Brazil; Universidade Federal da Bahia, Instituto de Biologia, Depto. Botânica, R. Barão de Jeremoabo s/n, Campus Universitário de Ondina, 40170-115, Salvador, Bahia, Brazil
Pentandrae Amazonian forest taxonomy new records Piperales Magnoliids

Abstract

Aristolochia subsect. Pentandrae is a monophyletic assembling of nearly 50 species distributed across the southern USA, Mexico, Guatemala and Belize, and the Antilles. The most consistent characters of the subsection are the pentamerous androecium and gynoecium, two traits not found elsewhere in the family Aristolochiaceae. Here, we report the first record of A. pentandra in Brazil, which also represents the first continental occurrence of Aristolochia subsect. Pentandrae in South America. This finding significantly expands the geographic range for the entire subsection. Here we fully document and discuss the morphology, conservation, and biogeography of this unexpected collection of A. pentandra in the Amazon basin. Additionally, we report the presence of A. stuckertii in Brazil, one of the hexandrous species belonging to the ‘A. lindneri group’, an informal group of five species from central and southern South America, proposed as sister to the subsection Pentandrae. The discovery of A. pentandra in Brazil significantly narrows the geographical disjunction between these two closely related clades.

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How to Cite

Freitas, J., Lírio, E.J.D., González, F., Negrão, R. & Alves-Araújo, A. (2025) Narrowing the geographic gap between the disjuncts Aristolochia subsect. Pentandrae and the A. lindneri group (Aristolochiaceae): new records of A. pentandra and A. stuckertii in Brazil. Phytotaxa 722 (1): 65–73. https://doi.org/10.11646/phytotaxa.722.1.6