Abstract
The author has studied morphological chracteristics of the 1st leaf of rice plant, which appeares above the coleptile, comparing it with the 2nd and the 3rd leaves. The main results were as follows : 1) The lst leaf consists of two parts : a blade and a sheath. And a ligule and two auricles are recognized apparently on it just as on the upper leaves. 2) The upper part of the sheath margin makes a part of the ligule, the fact being different from that in sugarcane. 3) Degrees of development of the ligule and auricles have some relation to the varietiy of the plant and soil humidity
