part of part of in taxon results in development of anatomical structure development lobar bronchus development lobar bronchus mesenchyme development GO:0060483 The biological process whose specific outcome is the progression of a lobar bronchus mesenchyme from an initial condition to its mature state. This process begins with the formation of the lobar bronchus mesenchyme and ends with the mature structure. The lobar bronchus mesenchyme is the mass of tissue composed of mesenchymal cells in the lobar bronchus. lung-associated mesenchyme development Gnathostomata <vertebrates> lobar bronchus mesenchyme