A taxonomic revision of the genus Capparis(Capparaceae) in New Caledonia

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Abstract

A revision of the genus Capparis has been carried out in NewCaledonia, a global biodiversity hotspot with a high rate ofendemism in its vascular flora. The taxonomic treatment of Capparisin this area required study because of some incompletely knowntaxa and deviating forms. Based on morphological anddistributional investigations carried out on historical and recentherbarium collections, four species are recognised in NewCaledonia: C. spinosa, belonging to sect. Capparis; C. quiniflora,belonging to sect. Monostychocalix; and C. parvifolia and C. artensis,both belonging to sect. Busbeckea. Capparis spinosa is representedby subsp. cordifolia, a taxon widespread in several Pacific islands, forwhich only scanty collections from the Loyalty Islands have beenexamined. Capparis quiniflora, widely distributed from the MalesianRegion to Australia, is present along the coast and lowlands of NewCaledonia on various substrata up to c. 250 m elevation. Capparisparvifolia is endemic to Mont Kaala, North Province of NewCaledonia, where it is reported on ultramafic substrata from c. 100to 800 m. Capparis artensis, known from New Caledonia andVanuatu, is widespread prevalently on ultramafic substrata from sealevel to c. 700 m. A nomenclatural novelty, C. artensis var. dielsianacomb. et stat. nov., is here proposed and seven lectotypes aredesignated. A key to species is provided, along with descriptions,distributions and autecological data. Capparis loranthifolia var.bancroftii, formerly recorded from a single mountain range of NewCaledonia, is excluded from the flora of the island.
Lingua originaleEnglish
Numero di pagine17
RivistaNew Zealand Journal of Botany
Stato di pubblicazionePublished - 2017

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Plant Science

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