A systematic revision of the Mangrove genus Sonneratia (Sonneratiaceae) in Australasia

In Australia, New Guinea and the southwestern Pacific seven taxa are recognised in Sonneratia, of which three species are redescribed in view of their Indo-Malesian counterparts ( S. alba, S. caseolaris, S. ovata), one species is redescribed from its most likely Indo-Malesian equivalent (S. lanceolata, being distinct from S. caseolaris), one widespread hybrid is fully described (S. x gulngai being the putative synonym of S. alba x S. caseolaris), and two other hybrids (S. alba x S. gulngai, S. alba x S. lanceolata) of very limited occurrence are described as sub-units of their closest ‘parental’ forms. A key, descriptions and full synonymy are given as well as 2 distribution maps, 6 other figures and one table.