Mandevilla horrida J.F. Morales, J. Bot. Res. Inst. Texas 1:863, f. 2. 2007. TYPE: PERÚ. CAJAMARCA: San Ignacio, San José de Lourdes, 23 Nov 1999 (fl), R. Vásquez & Flores 26349 (HOLOTYPE: CR; ISOTYPE: MO). Distribution.— Ecuador and Perú, at 1500–2100 m. Discussion.— Mandevilla horrida resembles M. hirsuta (Rich.) K. Schum., but it is separated by its larger floral bracts (32–46 × 10–19 mm vs. 11–20 × 1.5–8 mm), shorter sepals (4–6 mm vs. 7–12 mm), and lower part of the corolla tube 21–23 mm long (vs. 25–32 mm) (Morales 2007b). Specimen examined: ECUADOR. Zamora-Chinchipe: Zamora, Cordillera del Cóndor.Parroquia San Carlos de Las Minas, Nambija,cerro Colorado, 28 Jan 2005 (fl), Quizhpe et al. 808 (MO).

Published as part of Morales, J. Francisco, 2025, A New Species, New Records, And New Synonyms Of Mandevilla (Apocynaceae) From Ecuador, With Comments On Morphological Characters, pp. 39-50 in Journal of the Botanical Research Institute of Texas 19 (1) on page 46, DOI: 10.17348/jbrit.v19.i1.1391, http://zenodo.org/record/16906690