New Caledonia's vegetation is distinguished by the world's highest rate of endemism: 5 families, 107 genera and 3,380 species. Among these are "Acacia spirorbis", "Dracophyllum" species, "Drosera neocaledonica", "Grevillea gillivrayi", "Neocallitropsis pancheri" (Cupressaceae), and "Austrotaxus spicatus" (Taxaceae). Of the 44 species of Gymnosperm in the archipelago, 43 are endemic, including the unique parasite gymnosperm "Parasitaxus ustus". The palm trees include 37 endemic species belonging to 16 genera. For the endangered "Pritchardiopsis jennencyi", one only adult specimen is known. Three of the most primitive genera of "Araliaceae" also occur.