Parahellenia N. H. Xia, Juan Chen, L. Y. Zeng & S. Jin Zeng

Key to the species of Parahellenia in Vietnam 1. Leaf blade puberulent abaxially; labellum cream white...................................................................................................... P. candida - Leaf blade glabrous; labellum yellow with longitudinal orange to red markings at center...............................................................2 2. Plants unbranched or barely branched; bract apex with a soft mucro............................................................................. P. trongduyii - Plants densely branched; bract apex with a sharp mucro............................................................................................... P. tonkinensis
Published as part of Chen, Juan, Nguyen, Van Canh, Nguyen, Van Khuong, Nguyen, Khang Sinh, Nuraliev, Maxim S. & Xia, Nianhe, 2023, Taxonomic studies on Parahellenia (Costaceae) in Vietnam: a new species, P. trongduyii, and a new combination, P. candida, pp. 72-80 in Phytotaxa 583 (1) on page 79, DOI: 10.11646/phytotaxa.583.1.7, http://zenodo.org/record/7609199