A species of Rhizophora new to New Guinea and Queensland, with notes relevant to the genus

Abstract

Recent field work in Papua New Guinea and Queensland has revealed the presence of Rhizophora lamarckii, previously thought to be endemic to New Caledonia. Attention is drawn to these observations since they reveal that R. lamarckii has a much wider distribution than previously realized. The present article describes our observations in relation to other Rhizophora species in eastern Malesia, with a discussion of the evidence for the possible hybrid origin of R. lamarckii. Detailed diagnostic illustrations are provided in order to emphasize the status of R. lamarckii and assist the field worker. Some general discussion of the taxonomy of Rhizophora is also provided.