ボゴール植物園
The first known collection of "N. insignis" was made by August Adriaan Pulle on November 9, 1912. The specimen, "Pulle 277", was collected in southwestern New Guinea at the "[b]order of the Beaufort River" at an altitude of 80 m. It includes male floral material and is deposited at the Bogor Botanical Gardens (formerly the Herbarium of the Buitenzorg Botanic Gardens) in Java. It is also preserved in alcohol and is sheet 201110 at the National Herbarium of the Netherlands in Leiden.