How do I plot the posterior probability distribution of a particular node from a stochastic character map?

Question

[Namenlos]

I used phytools to create stochastic character maps of a discrete character from a set of 1000 phylogenetic trees. The function describe.simmap summarizes the results of these stochastic maps. This function yields as output the posterior probabilities of each node being in each state. What I want is not the posterior probability, but the probability distribution for a particular node in a particular state. Does phytools provide that? If not, how do I plot the posterior distribution for the probability of a particular state at a particular node from the character map data itself?