Phaeographis striata is a species of script lichen in the family Graphidaceae,[1] endemic to the Galápagos Islands.

The species is found in the lower transition zone, growing on columnar cacti and other plants native to the region.

The apothecia are immersed, lirellate, and initially fissurine, with thin, elongate, and moderately to sparsely branched lirellae.

The labia are thin and narrow, surrounded by a striate thalline margin composed of several papery thallus layers.

The disc is initially fissurine but soon expands, becoming immersed, flattened, blackened, and covered by farinose whitish pruina.