10 



THE BOTANICAL MAGAZINE. 



LVol. XXXIII. No. 3«9. 



observed in the chloroplasts of the treated cells as in the case with 

 fern prothallia. Within a week, some of the cells so treated begun to 

 grow adventitiously' from the both surfaces of the gemmae. The manner 

 of growth was not alike ; some of them showed a tube-like elongation, 

 others were less abnormal. In some of the gemmas, a large number of 

 cells were adventitiously grown, while in others only few cells were 

 induced. Some of those cells grew large and established the growing 

 point, forming the long filamentous, ribbon-like or more or less 

 heart-shaped, prothallia-like thalli on the surface of the gemmcC (Figs. 

 1-5). 



Fij,'. 1-0. Marchanlia sp. Adventitious growtli on llie gemmae. All camera 

 il rawing.-. 1-2. The same individnal figured from both surfaces. 4. I'lasmolvzcd 

 hy 10% KNOs, aud grown on 0A% Knop'a- solution, 15 days after treatment. 



