Two cultivars of the common bean (Phaseolus vulgaris L.) were subjected to three watering treatments. Dry weights of leaf, stem, root, pod wall and seed, and leaf areas were recorded a_t 10-day intervals from emergence. There was a preferential distribution of dry matter to the roots as water!ng was decreas??d, both before and after flowering. Root weight and leaf area decreased after flowermg. A maJor source of assimilates to the developing seed appeared to be those re-translocated from the _leaves, root, stem and pod wall. The cultivars were not significantly different in their response to the watermg treatments.