8.1. Mansoa difficilis (Chamisso 1832: 714) Bureau & Schumann in Von Martius & Eichler (1896: 201) (Fig. 10 d–e).

Diagnosis:— Mansoa difficilis can be distinguished by the striated bark, and extrafloral nectaries close to the leaflet veins abaxially.

Reproductive Period:— Flowers were collected in February, June, September, October, and November, fruiting in October.

Distribution and Habitat:— It occurs in Bolivia, Paraguay, Brazil, and Argentina (Lohmann 2010, Lohmann & Taylor 2014). Within the study area, it was registered in Céu Azul, Matelândia/Serranópolis, Capanema, Foz do Iguaçu, and in the PARNA Iguazú .

Selected Specimens Examined:— ARGENTINA. Misiones, Parque Nacional Iguazú: Puerto Iguazú, 3 December 1993, Vanni 3203 (CTES!) ; Puerto Iguazú, 10 December 2009, González 228 (CTES!) . BRAZIL. Paraná, Parque Nacional do Iguaçu: Capanema, 29 November 1966, Lindeman 3439 (MBM!, NYBG, UB, US) ; Foz do Iguaçu, Trilha do Poço Preto, 02 October 2006, Labiak 3766 (MBM!) ; Serranópolis do Iguaçu, 25°27’24.2”S, 54°04’58.4”W, 21 September 2017, Siqueira 2327 (HCF!) .