Figure 4.

Genes found in the inverted repeat of seed-free land plants. A liverwort (Mp = Marchantia polymorpha), two mosses (Pp = Physcomitrella patens and Sr = Syntrichia ruralis), a hornwort (Af = Anthoceros formosae), four lycophytes (Hl = Huperzia lucidula, If = Isoetes flaccida, Sm = Selaginella moellendorffii and Su = Selaginella uncinata) and five monilophytes (Ac = Adiantum capillus-veneris, Ae = Angiopteris evecta, As = Alsophila spinulosa, Ea = Equisetum arvense, Pn = Psilotum nudum) are compared for inverted repeat (IR) gene content, including new plastomes reported here. The figure is organized so that IRA, the small single copy (SSC) and IRB are presented top to bottom. Grey boxes denote genes found in the IR and white boxes denote genes found in the large single copy or SSC. Genes in square brackets are those partially encoded in the IR. Genes in bold emphasize that gene order within the leptosporangiate ferns have been reorganized relative to other plants [37,38].

Karol et al. BMC Evolutionary Biology 2010 10:321   doi:10.1186/1471-2148-10-321
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