Two new Malagasy species of Dombeya Cavanilles subgen. Xeropetalum (Delile) K. Schumann (Malvaceae) are described. Dombeya asymmetrica Applequist is native to Mananara-Nord in northeastern Madagascar, and D. rienanensis Applequist to the Matatana River basin. Dombeya rienanensis is placed within subseries Trohy Arènes. Dombeya asymmetrica is tentatively placed within subseries Repandae Arènes; the species is distinguished by its long, narrow lanceolate leaves with asymmetrical apices.