Complete chloroplast genome and phylogenetic analysis of <i>Smallanthus sonchifolius</i> (Asteraceae)

<i>Smallanthus sonchifolius</i> (Asteraceae), is an important food plant in the world. There is no systematic report on the chloroplast genome of <i>S. sonchifolius</i>. Here we reported its complete chloroplast genome and analyzed the basic characteristics. The chloroplast genome was 152,301 bp in length, had a GC content of 37.55%, and encoded 113 unique genes, including 79 protein-coding genes, 4 ribosomal RNA genes, and 30 transfer RNA genes. Phylogenetic analysis showed that the tribe Millerieae and the tribe Madieae are closely related in the Asteraceae family. In the tribe Millerieae, <i>Smallanthus</i> was more closely related to <i>Guizotia</i> and <i>Sigesbeckia</i>. This chloroplast genome not only enriches the genome information of <i>Smallanthus</i>, but also lays the foundation for understanding the phylogeny within the genus <i>Smallanthus</i>.