Abstract
Eichhornia crassipes is a floating aquatic plant native to the American tropics. Here we reported and characterized the first complete chloroplast (cp) genome of Eichhornia crassipes and analyzed the phylogenomic relationship of Commelinids based on complete chloroplast sequences. The complete chloroplast genome of Eichhornia crassipes has a typical quadripartite structure with a total length of 161,783 bp. A total of 124 genes, including 85 encoding genes, 38 transfer RNA genes, and 8 ribosomal RNA genes were annotated. The phylogenomic study validated the phylogenetic position of Eichhornia crassipes and showed that four species from Commelinales form a monophyletic group sister to Zingiberales.