The lichens which are broad like leaves with irregular surface, flat, broad, divided edges and many grooves are called foliose lichen. They are also called foliar lichens. Rhizine is produced from its lower surface. Such as Xanthoria calcicola, Peltigera canina, Parmelia Cetraria, Parmotrema tincotorum, Collema tenax, Flavoparmelia caperata, Zanthoria peltigera, Physcia caesia etc.