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 



4 



o 



5 



o 



6 



Fig. 2. — Growth of gem- 

 mae of Lunularia in various 

 3W/80 solutions during 150 

 days. The quantities are 

 stated in cubic centimeters 

 and the gain in length of 



thallus in 



NaCl 



per 

 1000 + CaCla 



cent. I, 



10, 



gain 820. 2, NaCl 1000 

 + KC1 22 + CaCU 10, gain 

 980. 3, distilled water, 

 gain 1220. 4, NaCl; 5> 

 KCl; 6, MgCU; gain o. 



