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The edges of foliose lichen rise up from the surfaces they grow on like the margins of curling paper.

The leaves and stem of the foliose forms effect the same division of labour in another way.

The thallus is plainly foliose with the margins of the lobes usually ascending and is gray-green to brown in color.

In the Acrogynous Jungermanniaceae the plant is throughout foliose, and the archegonia occupy the ends of the main shoot or of its branches.

Jungermanniaceae Acrogynae.—The plant consists of leafy shoots, the origin of which can be understood in the light of the foliose forms described above.