Plagiochila porelloides is commonly found on shaded rocks, cliffs, logs, tree bases and stream-banks.
Plagiochila porelloides is large. Green shoots are unbranched or irregularly branched.
Lateral leaves are strongly decurrent and slightly recurve up from a longitudinal groove at the base.
The leaves are unlobed, and oval.
The marginal teeth are rather blunt.
The lobes complex oil bodies are obvious. Trigones are not!
The stem is distinctly red colored.
Perigonial leaves are reduced and terminal on the shoot. Perigonial leaves enclose antheridia at their axils.
Rhizoids can be found on leaves.