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. 



