  Let $L\subset J^1M$ be a closed Legendrian, in the 1-jet space of a closed
manifold $M$, with simple front singularities. We define a natural
generalization of a Morse flow tree, namely, a stable flow tree. We show a
result analogous to Gromov compactness for stable maps -- a sequence of stable
flow trees, with a uniform edge bound, has a subsequence that Floer-Gromov
converges to a stable flow tree. Moreover, we realize Floer-Gromov convergence
as the topological convergence of a certain moduli space of stable flow trees.
