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Issue: Vol. 706 No. 1: 19 Jun. 2025
Type: Article
Published: 2025-06-19
DOI: 10.11646/phytotaxa.706.1.7
Page range: 91-100
Abstract views: 411
PDF downloaded: 18

Two new species of Dyssochroma (Solandreae, Solanaceae) and an updated identification key to the genus

Universidade Estadual de Feira de Santana, Departamento de Ciências Biológicas, Programa de Pós-Graduação em Botânica, CEP 44036-900, Feira de Santana, BA, Brazil
Universidade Estadual de Feira de Santana, Departamento de Ciências Biológicas, Programa de Pós-Graduação em Botânica, CEP 44036-900, Feira de Santana, BA, Brazil
Universidade Federal da Paraíba, Centro de Ciências Exatas e da Natureza, Departamento de Sistemática e Ecologia, CEP 58051-900, João Pessoa, PB, Brazil
Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, CEP 31270-910, Belo Horizonte, MG, Brazil
Escola Nacional de Botânica Tropical, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, R. Pacheco Leão 2040, CEP 22460-036, Rio de Janeiro, RJ, Brazil
Universidade Estadual de Feira de Santana, Departamento de Ciências Biológicas, Programa de Pós-Graduação em Botânica, CEP 44036-900, Feira de Santana, BA, Brazil
Brazilian flora hemiephiphytes lianas Solanales Eudicots

Abstract

Dyssochroma is a small genus of Solanaceae endemic to Brazil, previously known to include three species occurring in the Atlantic Forest domain. Here, we describe two new species of the genus: D. caatingae, from the Caatinga domain in Pernambuco state, and D. jardimii, from the Atlantic Forest domain of Bahia state. The two new species are characterized by a pubescent indumentum in the young branches, calyces, and corollas, with multicellular non-glandular trichomes, whereas their congeners are glabrous or glabrescent, with sparse, unicellular, non-glandular trichomes. Dyssochroma caatingae has a variety of non-glandular trichomes, including simple and branched, ovate leaf blades, and ovary 5–6 × 6 mm. Diagnostic traits of D. jardimii include leaves with revolute margins and trichomes concentrated along the midvein, and green corollas with purplish to brownish stripes. We provide detailed descriptions, illustrations, field photographs, a distribution map, and taxonomic notes for both new species. This study increases the number of recognized species in Dyssochroma from three to five. Additionally, we present an identification key to distinguish them.

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How to Cite

Silva, G.B.D., Jesus, R.J.A.D., Giacomin, L.L., Stehmann, J.R., Cardoso, P.H. & Silva, T.R.D.S. (2025) Two new species of Dyssochroma (Solandreae, Solanaceae) and an updated identification key to the genus. Phytotaxa 706 (1): 91–100. https://doi.org/10.11646/phytotaxa.706.1.7