262 



BOTANICAL GAZETTE 



[OCTOBER 



ments was obtained in part from a greenhouse and in part from moist 

 banks of earth along streams. Material from different sources was 

 never mixed together in any series of experiments. 



o G o 



456 



FIG. 2. Growth of gem- 

 mae of Lunularia in various 

 3w/8o solutions during 150 

 days. The quantities are 

 stated in cubic centimeters 

 and the gain in length of 

 thallus in per cent. I, 

 NaCl 1000 + CaCl 2 10, 

 gain 820. 2, NaCl 1000 

 + KC1 22 + CaCl 3 10, gain 

 980. 3, distilled water, 

 gain 1220. 4, NaCl; 5, 

 KC1; 6, MgCl 2 ; gain o. 



