sentences:  Flavoparmelia baltimorensis
  
  Flavoparmelia baltimorensis or Rock greenshield lichen (from "Lichens of North America") is a medium to large foliose lichen with a yellow green upper surface when dry; lobes rounded without pseudocyphellae; the upper surface with globose, pustule-like growths resembling isidia.Lower surface is black with a narrow brown zone at the margins.