Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Candollea 89-98 PROTEACEAE Virotia New Caledonia New Species Taxonomy Manganese Serpentine flora NOUVELLE CALEDONIE 2020 fdi:010079124 ENG Candollea 0373-2967 ISI:000542253800009 1 10.15553/c2020v751a9 https://www.documentation.ird.fr/hor/fdi:010079124 https://www.documentation.ird.fr/intranet/publi/2020/07/010079124.pdf 75 Horizon (IRD) Virotia azurea H.C. Hopkins & Pillon (Proteaceae), the seventh species in the endemic genus Virotia L.A.S. Johnson & B.G. Briggs from New Caledonia is described and illustrated. A distribution map and preliminary conservation assessment are provided. This new species occurs principally on non-ultramafic substrates in a restricted area of central Grande Terre. It has relatively long narrow leaves, often with distally undulate-sinuate or bluntly toothed margins and a pointed apex, plus blue flowers and laterally flattened, markedly beaked fruits containing seeds with blue to mauve cotyledons. Its characters are compared with those of other species of Virotia and a key to species is provided. A handful of specimens previously identified as Virotia francii (Guillaumin) P.H. Weston &A.R. Mast are determinated mostly as Virotia leptophylla (Guillaumin) L.A.S. Johnson & B.G. Briggs and other species; the former is now confined to ultramafic substrates in southern Grande Terre and the latter is more widespread, principally occurring on non-ultramafic substrates though occasionally found on ultramafic ones in the south of the island as well. 076 UR040