TRANSPIRATION BEHAVIOR OF RAIN-FOREST PLANTS. 



95 



experiment are from over-night readings, and are not to be correlated 

 with the stomatal conditions at 6 a. m. 



On October 16 simultaneous determinations of stomatal openness 

 were made on Peperomia turfosa, Pilea nigrescens, Diplazium celtidi- 

 folium, and Asplenium alatum, in connection with transpiration and 

 evaporation readings (table 38, figs. 17 and 18). Peperomia turfosa 



Table 37. Transpiration, relative transpiration, and stomatal behavior in Pilea nigrescens. 



Series run in laboratory; transpiration by weighing method; stomata from 



accompanying potted plants. 



Table 38. Transpiration, relative transpiration, and stomatal behavior in five species investigated 



simultaneously. 



