MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



147 



suits were obtained from the study of a number of plants at differ- 

 ent times. 



A fully etiolated specimen of Peltandra which was brought into 

 diffuse daylight, showed some marked changes as the result of 



B 



Fig. 105. Peltandra Virgtnica. A, epidermis from normal petiole. B^ epidermis 

 from etiolated petiole. 



illumination, among which were to be noted the assumption of the 

 horizontal position of the laminae, and the unequal development of 

 the basal lobes which ensued under such conditions. 



Peltandra is a bog plant, or rooting aquatic, according to circum- 

 stances. 



Phaseolus sp. (cultivated). 



Numbers of seedlings of Phaseolus were etiolated with the in- 

 variable result that the first internode attained a length about three 

 times the normal, when proper cultural conditions were furnished. 

 The first pair of leaves developed petioles over a centimeter in length, 

 and laminae of equal length. The entire shoot of the seedlings 

 attained an extreme length of 30 cm., the terminal portion above the 



