3.1. Bignonia binata Thunberg (1821: 35) (Figs. 4 a, 5 f).

Diagnosis:— Bignonia binata can be recognized by the cylindrical and smooth stems (vs. tetragonal and winged in B. sciuripabulum), and inflorescence racemose (vs. thyrsoid in B. sciuripabulum).

Reproductive Period:— Flowering from October to February, fruiting in December.

Distribution and Habitat:— It occurs from Mexico to Central and South America (Lohmann 2010, Lohmann & Taylor 2014, Zuntini et al. 2015). Within the study area, it was registered in Capanema, Céu Azul, Foz do Iguaçu, and in the PARNA Iguazú, in sympatry with B. sciuripabulum .

Selected Specimens Examined:— ARGENTINA. Misiones, Parque Nacional Iguazú: Puerto Iguazú, islãs del paseo superior, 29 February 1996, Vanni 3535 (CTES!) . BRAZIL. Paraná, Parque Nacional do Iguaçu: Capanema, margem do Rio Iguaçú, 08 December 1966, Lindeman 3481 (US, SPF) ; Céu Azul, trilha de Educação Ambiental, 07 November 2019, Ribeiro 06 (EVB!) ; Foz do Iguaçu, Trilha do Poço Preto, 03 October 2006, Labiak 3837 (SPF, MBM, UPCB!) .