Shigeo Kurata
Plants belonging to "N. eustachya" were identified as "N. alata" by a number of subsequent authors, including Shigeo Kurata in 1973, Mitsuru Hotta and Rusjdi Tamin in 1986, Mike Hopkins, Ricky Maulder and Bruce Salmon in 1990, and T. Sota, M. Mogi and K. Kato in 1998.