  This article grew out of the urge to realize explicit examples of solutions
for the Ricci flow as families of isometrically embedded submanifolds, together
with its Gromov-Hausdorff collapses. To this aim, we consider the Ricci flow of
invariant metrics in a class of flag manifolds.
  On the one hand, we contrast with a previous result in literature by
presenting entire flow lines of invariant metrics realized as orbits of a fixed
representation. Indeed, we prove that the subset of realizable metrics has a
global attractor with open interior, containing an expressive family of
complete flow lines. On the other hand, we prove that certain collapses cannot
be realized in any fixed Euclidean space.
  We provide a detailed picture of the flow, including examples of both
realizable and non-realizable flow lines and collapses.
