Circular map of the complete plastid genome of Ipomoea purpurea. The genome comprises an 88,172 bp LSC, a 12,110 bp SSC, and two 30,882 bp IRs. Position one of the annotated sequence begins at the LSC/IRA junction and increases numerically counterclockwise around the genome. Genes on the inside of the circle are transcribed clockwise, those on the outside, counterclockwise. Asterisks mark genes with introns (2 asterisks mark genes with 2 introns), Ψ indicates a pseudogene. INSET-Genomes scaled to relative size: Ipomoea (outermost), Cuscuta exaltata (middle), and C. obtusiflora (innermost).