xi] SEEDLINGS OF WATER PLANTAIN 153 



the next leaves formed had a smaller blade, a longer stalk, and 

 an upper epidermis with chlorophyll and but few stomates. 



FIG. 101. Alisma Plantago, L. Seedlings found growing under the shade of a large 

 A. Plantago plant in a dry ditch, May 31, 1911. (Nat. size.) [A. A.] 



FIG. 102. Alisma Plantago, L. One of the seedlings such as those shown in Fig. 101 

 which had germinated on dry land, but was planted in a pot on May 31, 1911, and 

 submerged in shallow water until August 9, 1911 (two months, nine days). In 

 this time it developed into a typical water form with three floating leaves (a, b, c) 

 and others showing transitions from the submerged type. (Reduced.) [A. A.] 



The succeeding leaves were long and simple. Fig. 103, p. 1 54, 

 illustrates this experiment. 



