290 Schively — Contributions to the Life History of 



On June 12, the main stem of a plant was cut off above 

 the first compound leaf, and all the axillary buds from the 

 simple leaves were removed. 



On June 29, the plant was one foot high, and the newly- 

 developed shoot in the axil of the compound leaf was 

 twining. 



On July 8, the plant was one and a half feet high, and 

 twining well. Axillary runners had developed. 



On July 13, the new twining shoot was cut off above its 

 first compound leaf. A bud remained in its axil. All 

 other axillary buds and branches were removed. 



On July 15, the bud had developed into a branch an inch 

 long. 



Unfortunately the last date has been omitted from my 

 notes, but in a short time this new branch twined and con- 

 tinued the upward growth of the plant. 



Cutting off Main Stem above Second Compound 



Leaf. 



On June 6, the main stem of a vigorous plant was cut off 

 above the second compound leaf. One bud remained in 

 the axil of this ; all others were removed. 



On June 29, the plant was two feet high. The new 

 shoot was twining ; the internodes were rather longer than 

 those on main stem. One axillary shoot ten inches long 

 arose from the axil of the first compound leaf. Along the 

 twining shoot a bud was seen in the axil of every leaf. 



The plant continued to increase in height, and the axil- 

 lary shoots developed rapidly. 



Experiments with Cotyledonary Shoots. 



Roots of young plants were carefully washed, then re- 

 placed in pots, so as to bring the cotyledonary shoots above 

 ground. Occasionally they were found already appearing 

 above ground. Usually they were white and finely pubes- 

 cent ; then they soon acquired a green color. For some days 

 they grew slowly ; they were supported by small bits of 



