Porella
Porella (order Jungermanniales) A genus of leafy liverworts, including P. platyphylla, which is a robust, conspicuous species which can form fairly extensive patches. The stems are 2- or 3-pinnately branched and up to 8 cm long. The leaves overlap closely in the incubous arrangement. There are 2 lateral rows of leaves; each leaf is divided into 2 parts: a broad, ovate part, and a much smaller, narrower lobe which looks like a separate leaf. There is also a conspicuous row of leaves on the under-surface, so that when the plant is viewed from below it appears to have 5 ranks of leaves. The leaves on the under-surface are broad and rounded with narrowly recurved margins. It is found, often abundantly, on shaded banks, tree roots, etc., mainly in calcareous districts.
More From encyclopedia.com
You Might Also Like
NEARBY TERMS
Porella