Abstract
Indigoferamonieriana M.Pignal & L.P.Queiroz, sp. nov. and Indigoferadumbeana M.Pignal & L.P.Queiroz, sp. nov., two new species from New Caledonia, are described and illustrated. Both new species have been collected for a long time, but most herbarium specimens were named as the Australian species Indigoferaaustralis, even though they clearly stand apart from this species and the other New Caledonian species of the genus. Indigoferamonieriana can be diagnosed by the tall virgate shrubby habit, leaves with an articulate rachis and 7–11 widely obovate to orbiculate leaflets with greyish undersurface and almost invisible venation. Indigoferadumbeana can be recognized by the arborescent habit, leaves with 15–19 elliptical leaflets, small, c. 6 mm long flowers, and ellipsoid seeds. Preliminary IUCN assessments are provided for both species. A key is provided for all species of Indigofera recorded from New Caledonia.
Highlights
New Caledonia is a sui generis French collectivity located in the southwest Pacific Ocean, 1210 km east of Australia
We studied the material kept at the National Herbarium of Paris (P) and the IRD herbarium of New Caledonia in Nouméa (NOU)
Guillaumin (1936) noted that several virgate specimens from New Caledonia could not be reported to the typical Indigofera australis and he preferred to determine them as I. australis var. gracilis DC
Summary
New Caledonia is a sui generis French collectivity located in the southwest Pacific Ocean, 1210 km east of Australia. It is an archipelago of about 18,600 km in Melanesia subregion with a mostly subtropical climate. According to the French taxonomic repository (Gargominy et al 2018), Leguminosae are represented by 39 genera (5% endemic to the island), 103 species (32% endemic), 6 subspecies and 13 varieties. General endemism in this collectivity is estimated at c. New Caledonia includes 2008 introduced species (Héquet et al 2009)
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