264 



BOTANICAL GAZETTE 



[OCTOBER 



TABLE V. LUNULARIA 



All quantities 'given are cubic centimeters of 3^/80 solutions 



Culture Solution 



Dilute artificial sea water: 

 1000 Nacl 



78 MgCl. 

 38 MgS04 

 22 KCl 

 ro CaCla 

 Distilled water. . . . 



NaCl... 

 1 000 NaCl 

 10 CaCla 



1000 NaCl 

 33 KCl 

 10 CaCU 



1000 NaCl 

 78 MgCU 

 10 CaCla 



looo NaCl ^ 



78 MgCl, 

 22 KCl 



1000 NaCl 



23 KCl 



1000 NaCl 

 78 MgCU 



MgCU.. 

 KCL . . . 



CaCU... 



Growth in i=;o Days 



Length of thallus 

 in mm. 



6.52 



6.60 

 0.50 



4.60 



5-40 



S-50 



0.54 



0.50 



0.52 



0.50 

 0.50 



4-55 



Per cent, increase in 

 length of thallus 



1204 



1220 



o 



820 



980 



1000 



8 



4 



o 



o 



810 



Aggregate length 

 of rhizoids jjer 

 thallus in mm. 



168 



180 



114 



123 -5 



125 



0-3 



O. I 



o 

 o 



90 



EQUISETUM 



The spores of Equisetum retain their vitality for only a few days. 

 The fruiting cones were brought into the laboratory and allowed to 

 stand for a day or two. The freshly shed spores were then placed on 

 the surfaces of solutions in covered glass dishes. They germinate 

 rapidly and in a few days produce prothallia of fair size. The aver- 

 age results of four series of experiments are shown in Table VI and 



w 



fig- 4' 



T 



FLOWERING PLANTS 



The most extensive series of experiments was made with wheat. 

 The variety selected is known as Early Genesee. The percentage 



