The inflorescence is a specialized reproductive branch that dictates flower positions, necessary for effective pollination. Over evolutionary time, changes in branching patterns have led to the evolution of highly diverse inflorescence architecture. This work investigates the developmental and evolutionary origin of inflorescence branching architecture in monocots focusing on umbels, a type of branching architecture where all flowers appear to arise from a single point. Using comparative developmental morphology and anatomy we find that umbel homoplasy is underlained by at least three case convergent architectures that produce an umbellate phenotype. Of those, there are three cases of parallel evolution. This highlights the liability of achieving this unique inflorescence form. Given that umbellate structures have evolved via distinct mechanisms, wetest if umbellate inflorescences conferred an adaptive advantage in those lineages. To do so, data was collected on inflorescence structure in all major lineages of monocots, including fossils, totaling more than 2500 species. A statistical phylogenetic framework was utilized to infer ancestral states in the monocots and test if umbels are correlated with shifts in diversification, with respect to all other inflorescence morphologies. However the models in the aforementioned approach are based largely on models of nucleotide substitution for discrete states. To  achieve a more realistic understanding of branching architecture evolution by incorporating morphospaces into comparative analyses. This was done by “rescoring” inflorescence states using a published inflorescence morphospace in conjunction with the threshold model, a more biologically realistic model. A series of simulations were performed using a new multivariate implementation of the threshold model and found that it is sufficiently accurate in ancestral state inference. Then, this model was used to test a 200-year-old conjecture on the origin of the monocot umbel found in the Amaryllis family (Amaryllidaceae). Overall, this research produced a framework that can broadly be applied to the study of other organisms in order to explore more mechanistic-based explanations for how macroevolution took place.