The N. fusca specimen, designated as Endert 3955, includes male floral material and is deposited at Herbarium Bogoriense (BO), the herbarium of the Bogor Botanical Gardens.
Spesimen N. fusca, ditetapkan sebagai Endert 3955, meliputi material bunga jantan dan disimpan di Herbarium Bogoriense (BO), herbarium di Kebun Raya Bogor.