The complete mitochondrial genomes of five lichenized fungi in the genus (Ascomycota: Parmeliaceae).

Known colloquially as 'Old Man's Beard', is a genus of lichenized Ascomycete fungi characterized by having a fruticose growth form and cartilaginous central axis. The complete mitochondrial genomes of , , , , and were sequenced using Illumina data and then assembled . These mitogenomes ranged in size from 52,486 bp () to 94,464 bp (). All were characterized by having high levels of intronic and intergenic variation, such as ORFs that encode proteins with homology to two homing endonuclease types, LAGLIDADG and GIY-YIG. Genes annotated within these mitogenomes include 14 protein-coding genes, the large and small ribosomal subunits (LSU and SSU), and 23-26 tRNAs. Notably, the gene was absent from each genome. Genomic synteny was highly conserved across the five species. Five conserved mitochondrial genes (, , , , and ) were used to infer a best estimate maximum likelihood phylogeny among these five and other relatives, which yielded relationships consistent with prior published phylogenies.