ex Wigman but without any elaboration on the description. In 1935 that genus was synonymised with Ptychosperma and the former (and current) name was reinstated. Darwin palm The outlying populations of this species to the east and southeast of Darwin were long accepted as the separate species Ptychosperma bleeserii (known as the Darwin palm) as described in 1928 by Max Burret in the journal Repertorium Specierum Novarum Regni Vegetabilis. However in 2003 Dixon et al. published a treatment that synonymised P. bleeseri with P. macarthurii, a treatment accepted by the Australian botanist John Leslie Dowe, and subsequently published in the online Flora of Australia. Etymolgy The genus name Ptychosperma is derived from the Ancient Greek word ptukhḗ, meaning "a fold"; and spérma, "seed". The species epithet macarthurii is in honour of Macarthur. Distribution and habitat Distribution of this species is mainly clustered in northern Cape York Peninsula, from around Silver Plains (north of Princess Charlotte Bay), north to the top of the peninsula, some Torres Strait Islands and into southern New Guinea. There is also a small cluster of populations in the Northern Territory, on the western margins of the Adelaide River floodplains and the nearby Howard River, near Darwin. Conservation P. macarthurii is classified as endangered in the Northern Territory where its distribution is limited, but in Queensland it is listed as least concern. it is not listed on the IUCN Red List. References External links See a map of observations of P. macarthurii at the Australian Virtual Herbarium. Biography of Thomas Reedy at the Encyclopedia of Australian Science macarthurii Palms of Australia Flora of the Northern Territory Flora of Queensland Flora of New Guinea Plants described in 1879 Taxonomy articles created by Polbot Taxobox binomials not recognized by IUCN