[R] Need formatting help - ctree - plot.party - node_hist

[Warren W. Kretzschmar]

Hi,
I am trying to get the terminal nodes of a plot of a ctree object to look nice.

Using the iris data I have:

library(party)
mtree <- ctree(Species ~ ., data=iris)
plot(mtree,terminal_panel=node_barplot(mtree))

The terminal nodes don't display the species names because the names
are displayed horizontally.  I would like to reduce the size of the
labels and make the terminal nodes horizontal barplots or rotate the
labels by 90 degrees, but I don't know how to do this.  Any help is
appreciated.

Warren