Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Phytotaxa 183-190 Acropogon Malvaceae mesic forest New Caledonia new species Sterculioideae taxonomy threatened species NOUVELLE CALEDONIE 2017 fdi:010070247 ENG Phytotaxa 1179-3155 ISI:000403457300002 3 10.11646/phytotaxa.307.3.2 https://www.documentation.ird.fr/hor/fdi:010070247 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers17-07/010070247.pdf 307 Horizon (IRD) A new species, Acropogon mesophilus Munzinger & Gateble (Malvaceae, Sterculioideae), is described from New Caledonia. This species is endemic to non-ultramafic areas, along the southwestern coast of Grande-Terre. The species has large leaves, widely ovate to ovate, and entire, and might be confused with only two other endemic species, namely A. bullatus (Pancher & Sebert) Morat and A. veillonii Morat. However, A. mesophilus differs from the other two species most evidently by its leaves 3-nerved, flat, and with truncate to rounded bases, versus leaves 5-nerved, bullate, and with cordate bases. A line drawing and color photos are provided for the new species, along with a discussion of its morphological affinities and a preliminary risk of extinction assessment of Endangered. 076 ; 082 UR123