Humboldt's araucaria (Silba 1986).
Syn.: Eutassa humboldtensis (J.T. Buchholz) de Laub. 2009. A molecular analysis places Araucaria humboldtensis into the clade of large-leaved species of New Caledonia, along with A. biramulata, A. laubenfelsii, A. montana, A. muelleri, and A. rulei, and a principal components analysis shows it as clearly distinct from a group containing all of the other species in the clade; this result, however, has not been explained (Gaudeul et al. 2012).
"A tree 6-15 m tall, with a candelabra-like crown. Bark exfoliating in quadrangular scales or in thin strips, bright brown turning gray. Branches somewhat in one plane, in a V-like pattern, 8-10 mm. in diameter. Juvenile leaves scale-like, triangular, 2.5-4 mm. long by 2-3 mm. wide, apex incurved. Adult leaves scale-like, midrib prominent, keeled, ovate, apex acuminate and incurved, 5-6 mm. long by 4-5 mm. wide. Male cone cylindrical, to 6 cm. long by 15 mm. wide, twisted, microsporophylls triangular, pollen sacs 6. Female cone subglobose, 9 cm. long by 8 cm. wide; bracts erect to 6 mm. long. Seed to 3 cm. long with a broad nut and with broad wings. Germination epigeal" (Silba 1986).
The IUCN reports that the species is facing a very high risk of extinction in the wild due to a limited and severely fragmented distribution combined with ongoing decline in extent of habitat, number of subpopulations, and number of mature individuals.
Gaudeul, M., G. Rouhan, M.F. Gardner, and P.M. Hollingsworth. 2012. AFLP markers provide insights into the evolutionary relationships and diversification of New Caledonian Araucaria species (Araucariaceae). American Journal of Botany 99(1):68-81.
Association Endemia, a site devoted to New Caledonian species. Has excellent photos, a range map, and other information. In French.
Last Modified 2017-05-09