334 



GEORGE HARRISON SHULL 



J uncus sp. 

 Lycopus rubellus 

 Plantago major 

 Planlago Rugelii 

 Polygonum aviculare 

 Polygonum Hydropiper 

 Potentilla Mom^peliensis 



Rumex cn'spus 

 Rumex obtusifoiius 

 SolanUvi Dulcamara 

 Triadenutn Virginicum 

 Trifolium praiense 

 Verbascimi Thnpsus 



Fig. 2. The lower-lying portion of the bed of St. John's Pond. Photographed 

 by Dr. Shreve on the same day. 



Surprised at the large proportion of germinations, I planned to 

 repeat the experiment, using still longer submergence. To this 

 end seeds of the following 22 species were collected in consider- 

 able quantities and the seeds of each species were divided into 

 six approximately equal lots : 



