THE STOMATAL FREQUENCIES, TRANSPIRATION AND OSMOTIC PRESSURES OF SCLEROPHYLL AND TOMENTOSE-SUCCULENT LEAVED PLANTS.

The article discusses the physiology of xerophytic plants in Australia. It cites a study which has shown that succulent plants have a low intensity of transpiration while hard-leaved xerophytes and those xerophytes with semi-succulent leaves transpired more than mesophytic leaves under high tension of meteorological factors. In addition, the study found that plants subjected to permanent wilting possess a greater number of stomata per unit area than those that develop in an unwilted condition. Data on stomatal size and stomatal index are also provided.