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from http://www.ijon.de/moose/geni/porella_en... Porella, the only genus of the family Porellaceae, consists of about 180 species, which live preferably in the tropics on rocks or bark. Porella platyphylla is a typical member of the genus. The leaves (i.e. the lobes of the leaves and the underleaves) are entire or at most with some sporadic muticous teeth.
Porella platyphylla can be found on the whole northern hemisphere. It grows on rocks or bark, sometimes even on earth.
Spotted growing on granite outcropping on top of Kennesaw Mountain (near a spring)
Spotted on Feb 8, 2013
Submitted on Feb 9, 2013