Abstract
New Caledonia is a tropical archipelago with very high biodiversity conservation challenges. Its flora is still imperfectly known while its ecosystems are increasingly degraded by various threats, including mining activity. In this context, there is an urgent need to describe the most threatened species so they can be accounted for in situ conservation programs. In this article, three species new to science are described and illustrated: Croton barrabeae Bruy (Euphorbiaceae), Geijera tartarea T.G.Hartley ex Munzinger & Bruy (Rutaceae) and Tristaniopsis planidisca Lannuzel (Myrtaceae). According to IUCN criteria, each of these species is highly threatened by mining activity.
References
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<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bachman, S.P., Moat, J., Hill, A.W., de la Torre, J. & Scott, B. (2011) Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. <em>In:</em> Smith, V. & Penev, L. (eds.) e-Infrastructures for data publishing in biodiversity science. <em>ZooKeys <br></em>150: 117–126. https://dx.doi.org/10.3897/zookeys.150.2109</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bernhaman, A. & Wilson, P.G. (2015) Two new species of <em>Tristaniopsis</em> (Myrtaceae) from Sabah. <em>Telopea </em>18: 475–479. https://doi.org/10.7751/telopea9291</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Baillon, H. (1862) Species Euphorbiacerarum, Euphorbiaceae Neo-Caledonicae. <em>Adansonia</em> 2: 211–248.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Brongniart, A. & Gris, A. (1863) Note sur deux genres nouveaux de Myrtacées de la Nouvelle-Calédonie. <em>Bulletin de la Société Botanique de France</em> 10: 369–374. https://doi.org/10.1080/00378941.1863.10827261</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bruy, D., Barrabé, L., Birnbaum, P., Dagostini, G., Donnat, M., Fambart-Tinel, J., Girardi, J., Hequet, V., Isnard, S., Jaffré, T., Munzinger, J., Nigote, W., Pillon, Y., Rigault, F., Vandrot, H., Veillon, J.-M. & Zais, R. (2021) L’Herbier de Nouvelle-Calédonie [Internet]. Nouméa: UMR AMAP. IRD, CIRAD, CNRS, INRAE, Univ. Montpellier. [http://publish.plantnet-project.org/project/nou] https://doi.org/10.23708/HERBIER-NOUVELLE-CALEDONIE</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bruy, D., Barrabé, L. & Munzinger, J. (2018) <em>Novitates neocaledonicae VII</em>: A new monocaulous species of <em>Bocquillonia</em> (Euphorbiaceae) from New Caledonia. <em>Phytotaxa</em> 360: 61–68. https://doi.org/10.11646/phytotaxa.360.1.6</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Dawson, J.W. (1992) Leptospermoïdées.<em> In</em>: Morat, P. & MacKee, H.S., <em>Flore de la Nouvelle-Calédonie et Dépendances</em> 18. Muséum National d’Histoire Naturelle, Paris, 251 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">DIMENC/SGNC-BRGM (2010) Geological map of New Caledonia.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Endemia & RLA Flore NC (2022) <em>La liste rouge de la flore menacée de Nouvelle-Calédonie, synthèse 2014–2021.</em> 4 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Fernando, E.S. & Wilson, P.G. (2021) <em>Tristaniopsis flexuosa</em> (Myrtaceae), a new species from ultramafic soils in the Philippines. <em>Telopea</em> 24: 345–349.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Gâteblé, G., Barrabé, L., McPherson, G., Munzinger, J., Snow, N. & Swenson, U. (2018) One new endemic plant species on average per month in New Caledonia, including eight more new species from Ile Art (Belep Islands), a major-hotspot in need of protection. <em>Australian Systematic Botany</em> 31: 448–480. https://doi.org/10.1071/SB18016</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Grandcolas, P., Murienne, J., Robillard, T., Desutter-Grandcolas, L., Jourdan, H., Guilbert, E. & Deharveng, L. (2008) New Caledonia: a very old Darwinian island? <em>Philosophical Transactions of the Royal Society B: Biological Sciences</em> 363: 3309–3317. https://doi.org/10.1098/rstb.2008.0122</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hallé, F., Oldeman, R.A.A. & Tomlinson, P.B. (1978) <em>Tropical trees and forests an architectural analysis</em>. Springer-Verlag, New York, 441 pp. https://doi.org/10.1007/978-3-642-81190-6</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Harris, G.J. & Harris, M.W. (2001) <em>Plant identification terminology: an illustrated glossary</em>. 2 edn. Spring Lake Publishing, Utah, USA, 206 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hartley, T.G. (1974) A revision of the genus <em>Acronychia</em> (Rutaceae). <em>Journal of the Arnold Arboretum </em>55: 469–523. https://doi.org/10.5962/p.324717</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hartley, T.G. (1982) A revision of the genus <em>Sarcomelicope</em> (Rutaceae). <em>Australian Journal of Botany</em> 30: 359–372. https://doi.org/10.1071/BT9820359</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hartley, T.G. (1983) A revision of the genus <em>Comptonella</em> (Rutaceae). <em>Bulletin du Muséum national d’Histoire naturelle, Paris, 4e série, 5, section B, Adansonia,</em> n°4: 391–413.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hartley, T.G. (1984) A revision of the genus <em>Dutaillyea</em> (Rutaceae). <em>Bulletin du Muséum national d’histoire naturelle, Paris, 4</em><sup><em>e</em></sup><em>série, 6, Section B, Adansonia</em> n°1: 29–35.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hartley, T.G. (1985) A revision of the genus <em>Medicosma</em> (Rutaceae). <em>Australian Journal of Botany</em> 33: 27–64. https://doi.org/10.1071/BT9850027</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hartley, T.G. (1997) Five new rainforest genera of Australasian Rutaceae. <em>Adansonia, série 3 </em>n°19: 189–212.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hartley, T.G. (2001) On the taxonomy and biogeography of <em>Euodia</em> and <em>Melicope</em> (Rutaceae). <em>Allertonia</em> 8: 1–328.</span></span></span></p>
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