ii8 



Meeting of April 2, 1929 



This meeting was held at Columbia University with an at- 

 tendance of twenty. 



Dr. B. O. Dodge gave an illustrated talk on his fungus hy- 

 brids, and showed microscopic slides to further demonstrate them. 

 His observations that sex differentiation and the segregation of 

 conidial characters took place at different divisions of the mother 

 cell caused lively comment and discussion. 



After the meeting, refreshments were served by the com- 

 mittee. 



FoRMAN T. McLean 

 Secretary 



Meeting of April 17, 1929 



This meeting was held at the Museum Building of The New 

 York Botanical Garden. The meeting was called to order by 

 President Denslow at 3:30 p.m. 



Dr. N. L. Britton, Director-in-Chief of The New York Botani- 

 cal Garden, spoke on "Botanical Studies in Porto Rico" with 

 especial reference to studies carried on there during the past 

 winter, with Mrs. Britton. His narrative will be published in 

 Journal of The New York Botanical Garden" for May, 1929. 



Dr. P. W. Zimmerman of the Boyce Thompson Institute, 

 Yonkers, New York, spoke on "Special Phases of Vegetative 

 Plant Propogation." 



Vegetative propagation is the multiplication of plants by means 

 of vegetative parts such as stems, leaves and roots. The most 

 common method is to place a piece of stem in moist sand and keep 

 it supplied with water until new roots are produced. The rooted 

 cutting is then transferred to soil to establish a new plant of the 

 same type as that from which the cutting was taken. This eliminates 

 variation such as is characteristic for plants originating from 

 seed. Hybrids do not come true from seed, but when propagated 

 vegetatively the new individuals have all the characteristics of the 

 mother plant. 



The problem is that not all plant types can be grown from 



