Mandevilla glandulosa (Ruiz & Pav.) Woodson, Ann. Missouri Bot. Gard. 19:66. 1932. Echites glandulosus Ruiz & Pav., Fl. Peruv.2:19, t. 135.1799. Prestonia peruviana Spreng.,Syst.Veg. 1:637.1825, nom. Illeg. Haemadictyon glandulosum (Ruiz & Pav.) A.DC., Prodr. 8:427. 1844. Odontadenia glandulosa (Ruiz & Pav.) K. Schum., Nat. Pflanzenfam. 4:169. 1895. TYPE: PERÚ. LORETO: Muñas, 1778–1788 (fl), J. PavÓn s.n. (HOLOTYPE: MA barcode #814491; ISOTYPES: B [destroyed, photo F neg. 4515], BC [BC873080]. F [photo F neg.73088],G-DC barcode #00169609). Mandevilla versicolor Woodson,Phytologia 9:347.1964. TYPE: ECUADOR. EL ORO: entre Paccha y Puente Grande,pasando la Montaña de Pueblo Viejo, Cordillera Suchiquilla, Cordillera de Dumán y Sambotambo, 26 Aug 1943 (fl), J. Steyermark 54154 (HOLOTYPE: F [photo F neg.50812]; ISOTYPES: NY barcode #01185989,US barcode #00112076). Syn. nov. Distribution. — Ecuador, Perú, and Bolivia, at 1400–2700 m. Discussion. — The type of Mandevilla versicolor matches the type of M.glandulosa, having similar leaves, inflorescence, and corolla characters; thus, it is relegated to its synonymy. The former species was not cited by Potgierter and Zarucchi (1999), Ulloa-Ulloa & Neill (2005) or Neill & Ulloa-Ulloa (2011).

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 47, DOI: 10.17348/jbrit.v19.i1.1391, http://zenodo.org/record/16906690