Scientific name: Pycreus unioloides (R. Br.) Urb. 1900
English name:
Vietnamese name: Cói trục dai hột dưa; Lác hột dưa
Other name: Cyperus unioloides R. Br. 1810 (CCNVN, 2:791; CCVN, 3:693). - Pycreus angulatus Nees, 1834 (FGI, 7:35);