  To investigate the topological structure of Morse flows on the 2-disk we use
the planar graphs as destinguished graph of the flow. We assume, that the flow
is transversal to the boundary of the 2-disk. We give a list of all planar
graph with at least 3 edges and describe all planar graphs with 4 edges. We use
a list of spherical graph with at least 4 edges.
