Taxonomy
Common name :
Haö (drehu) dridri (nengone)
Synonyms
Oxera floribunda Schltr.Red List Status -
Least Concern (LC) , assessed in 08/09/2017Protected species -
in Southern Province
Oxera balansae is a long and slender liana endemic to New Caledonia, only known from Ouvéa and Lifou (Loyalty Islands) and the Isle of Pines (Ile des Pins). It is found on the edges or in dense humid forest on calcareous rocks up to 36 m asl. Its area of occupancy (AOO) and extent of occurrence (EOO) are estimated to be 32 and 5,907 km², respectively, and it is known to occur in three locations. This species does not seem directly threatened and its habitat remains rather protected from the usual threats occurring in New Caledonia. Therefore, O. balansae is listed Least Concern (LC).
Geographical area
O. balansae is an endemic species of New Caledonia only known from Ouvéa, Lifou at Loyalty Islands and Ile des Pins.
Population
The population size is unknown but based on field observations, O. balansae is quite common with a good regeneration.
Habitat
O. balansae occurs in dense humid forest or on the edge of humid forest only on calcareous rocks, up to 36 m asl.
Threats
This species does not seem globally threatened in its habitat.
Conservation
Oxera balansae is only protected by legislation in Province Sud and it does not occur in any protected areas. This species is cultivated at the IAC (Institut Agronomique de Nouvelle-Calédonie) nursery of Saint-Louis with only a few number of individuals.
Bibliography
Barrabé L, Karnadi-Abdelkader,G, Ounemoa,J,de Kok RPJ., Robert N, Gâteble,G. 2015. Recircumscription of Oxera (Lamiaceae: Ajugoideae) ta include Faradaya based on molecular and anatomical data. Botanical Journal of the Linnean Society(179) , p.693-711.
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.
Gâteblé, G. 2012. History, Biology, and Conservation of Pacific Endemics.1. The Royal Creeper, Oxera pulchella (Lamiaceae),a New Caledonian Ornamental Plant1. Pacific science(66(4)) , p.413-433.
Endemia.nc 2016. Faune et Flore de Nouvelle-Calédonie.
Mabberley DJ, de Kok RPJ. 2004. Labiatae. In: Morat P,ed. Flore de la Nouvelle-Calédonie et dépendance.
Gâteblé, G. 2016. Flore ornementale de Nouvelle-Calédonie.
Experts
Assessor(s): Gâteblé, G., Barrabé, L., Fleurot, D., Amice, R., Cazé, H., Bruy, D., Héquet, V., Vandrot, H., Butin, J., Mandaoué, L., Haverkamp, C., Dumontet, V., Laudereau, C.
Reviewer(s): Meyer, S.
Facilitator(s): Tanguy, V., Warimavute, G.