Most plants in collections labelled Cedrus deodara ‘Glauca Pendula’ actually belong to C. atlantica ‘Glauca Pendula’. Their foliage will be shorter than one would expect in C. deodara and of a colder, more silvery blue, typical of glaucous forms of C. atlantica.
There are exceptions, of course, and Larry Hatch draws attention to a remarkable specimen clearly attributable to C. deodara growing in the J.C. Raulston Arboretum. It is distinctly pendulous, but perhaps more glaucous in some lights than others. Anyway, it merits attention and probably naming. As Hatch rightly points out this name would be invalid if used today, but even if this weren’t the case, it has already been applied to another species and cannot be repeated within the genus. We are using it here as a placeholder. (Hatch 2018–2020).