BEGONIA HEMICARDIA (SECT. PETERMANNIA, BEGONIACEAE), A RESURRECTED HETEROTYPIC SYNONYM AND NOMEN NUDUM

The nomen nudum Begonia hemicardia Elmer ex Merr. (Begonia sect. Petermannia) was coined by A.D.E. in 1915. He annotated one of his collections (14366 from Mount Bulusan, Luzon) the PNH herbarium with name but did not formally publish it. E.D. Merrill 1923 recognised as a synonym binuangensis After thorough studies living and preserved specimens relevant literature, we found to be different B. binuangensis. is allied group climbing Philippines axillary inflorescences numerous, subsymmetrical, ovate lanceolate-ovate leaves, namely aequata A.Gray, binuangensis, edanoii Merr., gracilipes lagunensis Elmer, megacarpa sarmentosa L.B.Sm. & Wassh. wenzelii However, combination characters such long internodes, large persistent stipules, serrate leaf margins, inflorescence staminate flowers borne on jointed rachis readily distinguish these other species, validly describe new species here.