Dry weight per unit leaf area, leaf thickness, the percentage of dry matter and the stomatal density of species and varieties grown under strong light conditions were higher than those grown under weak light conditions. However, the chlorophyll content of those grown under weak light was conversely higher. The chlorophyll content of species and varieties grown under high temperature was high, but as the temperature reached at the level of 35℃, the content tended to be lower. The variation in leafthickness, dry weight per unit leaf area, the percentage of dry matter, stomatal length and stomatal density, due to the growth temperature conditions, differed according to varieties, but there was no definite tendency.