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Issue: Vol. 704 No. 1: 4 Jun. 2025
Type: Article
Published: 2025-06-04
DOI: 10.11646/phytotaxa.704.1.5
Page range: 60-68
Abstract views: 292
PDF downloaded: 13

Sida antonioi: a new species of Sida sect. Malacroideae (Malvoideae, Malvaceae)

Universidade de Mogi das Cruzes, Núcleo de Ciências Ambientais, Laboratório de Sistemática Vegetal, Avenida Cândido Xavier de Almeida e Souza, Centro Cívico, 200, 08780-911, São Paulo, Brazil
Universidade de São Paulo, Instituto de Biociências, Departamento de Botânica, Rua do Matão, Butantã, São Paulo, 05508-090, Brazil
Universidade de Mogi das Cruzes, Núcleo de Ciências Ambientais, Laboratório de Sistemática Vegetal, Avenida Cândido Xavier de Almeida e Souza, Centro Cívico, 200, 08780-911, São Paulo, Brazil
Atlantic rain forest Endemism Southeast Region Taxonomy Eudicots

Abstract

We describe Sida antonioi, a new species of Sida sect. Malacroideae, based on herbarium specimens and in situ observations. Previously misidentified as other species within the section, S. antonioi is distinguished by its dimorphic stipules on the stem, apical inflorescence, calyx with long yellow simple trichomes on the lobe apex, and non-muricate mericarps. The species is endemic to the Atlantic Forest biome in southeastern Brazil. We provide a detailed taxonomic description, a geographic distribution map, and a preliminary conservation assessment. Additionally, we compare its diagnostic characters with those of three morphologically similar and geographically proximate species within Sida sect. Malacroideae.

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How to Cite

Camargo, R.P., Yoshikawa, V.N. & Duarte, M.C. (2025) Sida antonioi: a new species of Sida sect. Malacroideae (Malvoideae, Malvaceae). Phytotaxa 704 (1): 60–68. https://doi.org/10.11646/phytotaxa.704.1.5