Notelaea crassifolia is an endemic shrub from New Caledonia, restricted to the summits of two massifs in the south of Grande Terre : Mont Kouakoué and Mont Humboldt. It occurs in shrubland and forest on ultramafic soil between 1,000 and 1,600 m asl. Alyxia humboldtensis is a small procumbent liana endemic to New Caledonia where it is is known from only one population, located near the Mont Humboldt summit. It grows in the cyperaceous vegetation between peridotite rocks at 1,500 m asl. It is not threatened at the moment, but as it occurs in one locality at high altitudes, it could be impacted by climate change in the future, although the exact timescale and extent of impact are uncertain. Therefore, Notelaea crassifolia is precautionarily listed as Near Threatened (NT), approaching the threshold for Vulnerable under criterion D2.

Geographical area

Notelaea crassifolia is endemic to New Caledonia where it is restricted to the summits of two massifs in the south of Grande Terre : Mont Kouakoué and Mont Humboldt.

Population

Population size is unknown.

Habitat

This species occurs in shrubland and forest on ultramafic soil between 1,000 and 1,600 m asl.

Threats

This species is not threatened at the moment, but as it occurs in one locality at high altitudes, it could be impacted by climate change in the future, although the exact timescale and extent of impact are uncertain.

Conservation

Notelaea crassifolia is unprotected by legislation in New Caledonia and it occurs in two protected areas: Côte Oubliée, Massif du Kouakoué.

Bibliography

Endemia.nc 2016. Faune et Flore de Nouvelle-Calédonie.

Morat, P.; Jaffré, T.; Tronchet, F.; Munzinger, J.; Pillon, Y.; Veillon, J.-M. and Chalopin, M. 2012. Le référentiel taxonomique Florical et les caractéristiques de la flore vasculaire indigène de la Nouvelle-Calédonie [The taxonomic database « FLORICAL » and characteristics of the indigenous flora of New Caledonia]. Adansonia sér 3(34) , p.177-219.

Munzinger J., Morat Ph., Jaffré T., Gâteblé G., Pillon Y., Rouhan G., Bruy, D., Veillon J.-M., & M. Chalopin 2020. FLORICAL: Checklist of the vascular indigenous flora of New Caledonia [continuously updated].

Forman, L. , Green, P-S. 1998. Flore de la Nouvelle-Calédonie et Dépendances, Volume 22 : Menispermaceae Oleaceae Passifloraceae.

Experts

Assessor(s): Amice, R., Bruy, D., Cazé, H., Eltabet, N., Garnier, D., Fleurot, D., Lannuzel, G., Laudereau, C., Vandrot, H.

Reviewer(s): Meyer, S.

Facilitator(s): Fourdrain, A., Warimavute, G.