Platythecium commiscens is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae.

[1] Found in India, it was formally described as a new species in 2005 by Bharati Adawadkar and Urmila Vasudev Makhija.

The lichen has a whitish-green to greenish coloured thallus that is encircled by a thin black prothallus.

The species epithet, derived from the Latin commiscens ("intermingling"), refers to this characteristic feature.

It is this feature that distinguishes the species from the morphologically similar Platythecium parvicarpum.