, a new bisexual species of (Hydrocharitaceae) from southwestern China.

, a new species (Hydrocharitaceae) from southwest China is here described and illustrated. Comparing its morphological features to putative close relatives , it has 3-4 flowers (vs. 2-5) each spathe, hexagonal-cylindric fruit, white styles (vs. yellow), green leaves (vs. dark green) and fruit tiny winged (vs. winged obviously). Molecular phylogenetic investigation of four DNA sequences (ITS, L, K5' intron and S-G) and the Poisson Tree Processes model for species delimitation (PTP) analysis, further resolves as a new species that is close to with distinct support.