  The Rosette Molecular Complex contains embedded clusters with diverse
properties and origins. We have previously explored the shell mode of formation
in the north (Regions A & B) and the massive concentrations in the ridge
(Region C). Here, we explore star formation towards the south of the complex,
Region D, based on data from the spatially complete 2 Micron All Sky Survey. We
find that stars are forming prolifically throughout this region in a highly
structured mode with both clusters and loose aggregates detected. The most
prominent cluster (Region D1) lies in the north-center. This cluster is over 20
pc to the south of the Monoceros ridge, the interface of the emerging young OB
cluster NGC 2244 with its ambient molecular clouds. In addition, there are
several branches stemming from AFGL 961 in Region C and extending to the
south-east boundary of the cloud. We invoke a tree model to interpret this
pattern, corresponding to probable tracks of abrupt turbulent excitation and
subsequent decay. Alternatively, we discuss gravoturbulent collapse scenarios
based on numerical simulations. Relative stellar ages and gas flow directions
will differentiate between these mechanisms.
