’Rex’ (Pisum sativumL.)isanewwhite field pea, bred by S. A. Nickerson of France, that has been released by Crop & Food Research for arable cropping farmers in Canterbury, New Zealand. ‘Rex’ has a conventional plant type with an upright growth habit. The dry seed of ‘Rex’ is white, with a yellow cotyledon, and a mean 1000 seed weight of 260 g. ‘Rex’ has produced high and stable seed yields in regional evaluation trials conducted over four successive seasons in Canterbury, New Zealand.