Alternanthera paronychioides St Hil. (Amaranthaceae) in Indo-Malesia

During a study of species of Alternanthera Forsk. introduced in the Netherlands it was necessary to compare the Malesian representatives of A. ficoidea (L.) R. Br. ex Griseb. ssp. bettzickiana (Regel) Backer (Fl. Mal. I, 4, 1949, 91). The material under this name present in the Rijksherbarium, Leiden, proved to be heterogeneous, part of it belonging to another species. Dr. Van Steenis pointed out to me an article by Pedersen (Kurtziana 14, 1967, 437), where A. paronychioides St. Hil. was mentioned for Malesia, and showed me his correspondence with the author, where further details concerning this species were given. A closer study showed the unidentified specimens to belong to that species.