The orchid amateur Georges Bronckart. A biographical contribution, with tive letters (1903-1904) to A. Cogniaux. In 1903 and 1904, Georges Bronckart, a Belgian living in lndochina, corresponded with the orchid specialist Alfred Cogniaux. Five of his letters, in French, conserved in BR, are reproduced here. They deal with specimens send from Annam (Vietnam) to Belgium, ask for information on their identification, and make proposals for trade. The scanty biographical information on this orchid amateur is reviewed. Some Bronckart material became inpoTtant for horticulture and hybridizing, e.g. Dendrobium bronckartii De Wild.