Step 1: Several workers proposed different concepts to explain the zonal organisation of the shoot apical meristem, for example Schmidt's tunica corpus theory and Buvat's meristeme d'attente (waiting meristem).
Step 2: R. Newman put forward his own concept and used the term "continuing meristematic residue" (CMR) to describe the region of the shoot apex that keeps dividing slowly and continues to contribute cells throughout the plant's growth.
Step 3: So the term is credited to Newman.