The third leaf of wheat, variety Jufy I, was allowed to assimilate 14CO2 for 2 hrs.; after a further hour the distribution pattern of the assimilates was determined. Uptake of 14CO2 and assimilates leaving the leaf increased until the leaf was fully expanded, then slowly decreased. High proportions of labelled translocates were recorded in both the stem and the the root system, that in the roots increasing greatly as movement of translocates to the leaves decreased. The two fully grown leaves, L1 and L2, imported only slight amounts of labelled translocates. Movement of labelled translocate to each of the younger leaves in turn occurred in a striking pattern, such that import into a given leaf reached a maximum which coincided with its maximum rate of growth, subsequently falling rapidly and reaching a very low level by the time the leaf is fully grown. The results are discussed in relation to what is known of the general pattern of growth and translocation in the wheat plant.