A genus of leafy liverworts including P. porelloides, which is common in moist, shady habitats. The shoots are robust (2–10 cm long), erect or ascending, and little branched. The leaves are large, and overlap in the succubous arrangement. Each leaf is broad and rounded and often minutely toothed. P. porelloides is dull green, and found on banks in woods, on rocks and walls, etc., especially on neutral or calcareous substrates.
Subjects: Plant Sciences and Forestry.