miscellaneous: experimental teratosis 595 



In other words, the organs then full grown and proliferous were 

 embryonic some weeks earlier at the time of repotting when the 

 shock was assumed to have occurred. I reached this conclusion 

 by knowing about how much growth a given plant was able to 

 make in 6 or 8 weeks and counting back in this way from its tip 

 several internodes I would come always to the leaves and inter- 

 nodes showing the excessive proliferation of shoots, which leaves 

 and internodes must have been quite small at the time of the 

 repotting. This, of course, while a legitimate inference, did not 

 throw any light on the exact size of the leaf or internode (stage 

 of development, wrapped or unwrapped) when the shock occur- 

 red and, other than inferentially, did not prove the phyllomania 

 to be due to loss of water, nor did it answer the question: Can 

 you get it again, or is it seasonal and outside of experimental 

 influence? 



19. In July, 1918, therefore, I measured and made records 

 of the stage of development of each leaf and shoot on 18 well- 

 grown plants before they were repotted, the final records being 

 made in the afternoon of July 23 and the plants repotted the 

 next forenoon at which time many of the superficial roots were 

 cut away. These were plants 10 to 20 inches high (most 13 to 

 18 inches) with many fine leaves. They were grown from dried 

 cuttings set out March 28, 1918. Every one of them responded 

 to the shock more or less, and most of them (all but one dwarf 

 plant) strikingly (see Figs. 429, 430, 432, 434, 435, 436, 439^, 

 and first part of Table II). The dwarf referred to was branched 

 six times at or near the surface of the earth when examined in 

 October and showed no phyllomania on its internodes, but when 

 reexamined six weeks later adventive buds in small numbers and 

 large corky patches were developing from the proper internodes 

 on four of the six shoots. 



20. In a second experiment I used 16 larger plants stand- 

 ing on the same bench. These were plants grown from dried 

 cuttings planted December 26, 1917. These 16 plants were 



Leaf M (dwarfed) and the internodes Mi and CK were embryonic and stipule- 

 wrapped on July 23. Cork has formed at CK. Both M and Mi are full of shoots 

 and also CK where it is not covered with cork. L undoubtedly was also pro- 

 liferous. Photographed September 30, 1918. Much reduced. 



