Foliicolous refers to the growth habit of certain lichens, algae, fungi, liverworts, and other bryophytes that prefer to grow on the leaves of vascular plants.[1][2][3] Foliicolous simply means 'growing upon leaves'[4] whilst epiphyllous derives from the Greek epi-[5] meaning on or over and phyllous means leaf[6] so 'over leaf' and hypophyllous means 'under leaf'.[7] The microhabitat on the leaf surface is called a phyllosphere.[2][3]