Sida antonioi: a new species of Sida sect. Malacroideae (Malvoideae, Malvaceae) Author Camargo, Rafaela P. 0000-0001-9651-6121 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 rafaela-camargo12@hotmail.com Author Yoshikawa, Vania N. 0000-0002-7056-988X Universidade de São Paulo, Instituto de Biociências, Departamento de Botânica, Rua do Matão, Butantã, São Paulo, 05508 - 090, Brazil vania_nobuko@hotmail.com Author Duarte, Marília C. 0000-0002-1257-3389 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 mariliacd@umc.com text Phytotaxa 2025 2025-06-04 704 1 60 68 https://doi.org/10.11646/phytotaxa.704.1.5 journal article 312917 10.11646/phytotaxa.704.1.5 cfbb56f9-310b-462f-8e82-e1970bd4af81 1179-3163 16716610
TABLE 1. Morphological comparison of S. antonioi, S. plumosa, S. brittonii, and S. harleyi distributed in the states of Espírito Santo, Minas Gerais and Rio de Janeiro.
CharactersS. antonioiS. plumosaS. brittoniiS. harleyi
Adaxial leaf surface trichomesGlabrous in the steams; simple trichomes in the apical inflorescence leavesGlabrous or simpleSimpleSimple and stellate
Stem stipule shapeDimorphic, Oblanceolate and oblongDimorphic, Lanceolate and oblongMonomorphic Narrow-obovate to linearDimorphic linear and spatulate
Color of trichomes of apical stipuleYellowHyalineHyalineHyaline
Apical inflorescence stipule shapeOblanceolate and linear (dimorphic)Lanceolate (monomorphic)Narrowly obovate to linear (monomorphic)Linear (monomorphic)
Calyx trichomesGlabrous at the base, yellow simple hairs at the apex with 0.3–0.4 cm longGlabrous at the base, hyaline simple hairs at the apex with 0.1–0.2 cm longSimple, a tuft of hyaline hairs at the baseStellate, apex with 0.1–0.2 cm long cilia, a tuft of hyaline hairs at the base
Mericarp(4–)5 Muticous, non–muricate, irregular margins6–7 Muticous, slightly muricate, three to five teeth on the sides5 Submuticous, slightly muricate, deep lateral crests6–8 Submuticous, muricate
Mericarp trichomesPunctiform glandularPunctiform glandularGlandular, 4–5 cellsGlandular, stellate at the apex of prominences
Seed trichomesWavy stellate, ferruginous at the apex of the seedWavy stellate, hyalineWavy stellate, ferruginous at the apex of the seedWavy stellate, ferruginous
Distribution (Brazilian states)Espírito Santo, Minas Gerais, and Rio de JaneiroAlagoas, Bahia, Ceará, Paraíba, Pernambuco, São Paulo, and Sergipe.Bahia, Ceará, Espírito Santo, Minas Gerais, Paraíba, Rio Grande do Norte, Rio de Janeiro, and SergipeBahia, Minas Gerias, Pernambuco, Rio de Janeiro, and Sergipe