What is "lecidea geographica"

Map \Map\ (m[a^]p), n. [From F. mappe, in mappemonde map of the world, fr. L. mappa napkin, signal cloth; -- a Punic word. Cf. Apron, Napkin, Nappe.]

1. A representation of the surface of the earth, or of some portion of it, showing the relative position of the parts represented; -- usually on a flat surface. Also, such a representation of the celestial sphere, or of some part of it.

   Note: There are five principal kinds of projection used in making maps: the orthographic, the stereographic, the globuar, the conical, and the cylindrical, or Mercator's projection. See Projection.

2. Anything which represents graphically a succession of events, states, or acts; as, an historical map.

   Thus is his cheek the map of days outworn.
   --Shak.

   Map lichen (Bot.), a lichen ( Lecidea geographica.) growing on stones in curious maplike figures.
   --Dr. Prior.