Gene maps of the Equisetum arvense and Isoetes flaccida plastomes. The inverted repeats (IRA and IRB) which separate the genome into the large (LSC) and small (SSC) single copy regions are indicated on the inner cycle along with the nucleotide content (G/C dark grey, A/T light grey). Genes shown on the outside of the outer circle are transcribed clockwise and those on the inside counter clockwise. Gene boxes are color coded by functional group as shown in the key. An asterisk (*) denotes genes with introns and a psi (ψ) denotes pseudogenes.
Karol et al. BMC Evolutionary Biology 2010 10:321 doi:10.1186/1471-2148-10-321