Burns and Heddeii. Conditioiis iiiliuenciugregeiieratiouof hypocoU'I. oS^ 



a bucl with one leaf,12 buds ^vith two leaves, 126 buds with 

 three leaves at tlie tirst node. Subsequent nodes produced the 

 normal nnmber of leaves. 



The same fact is trno but less marked in Liuum and 

 AntirrJinium maju.s. Many of the tirst plant produee the iirst 

 adventitions buds with three leaves while the second bud on the 

 same individual had only two at the tirst node. 



With Auth'irrh'nnun, D in 51 produced three leaves, one in 

 51 produced four while the otliers produced two, on the tirst 

 node. 



Ex}»eriinents. 



A. Uninjured plants. It may be best perhaps to give 

 result of experiments and observations on uninjiu-ed seedlings. 

 Previous reference has been made to the faets that potted plants 

 and plants in places produee these buds in some species while 

 in others the phenomenon is a regulär occurrence on a large 

 number of individuals. 



Fig. 3. Antirrhinum majiis. 

 Two seedlings grown in a damp Chamber without support. In boöi cases 

 „adventitions- buds were produced a. cotyledons. b. ..adventitious" buds. 



The number of shoots is always few and their position 

 varied, but the larger per cent is always found near the base. 

 The three plants named produced these buds when kept in a 

 crock in a damp Chamber in the following per cent. Linnm 

 7^10^ Luiaria 19 °o, and Antlrrhiniim 30 °o. Usually only one 

 bud was developed and the near the base. 



Plants of Änfirrhinum do not stand erect and often bend 

 over on the ground. In this case buds develoj) on the upper 

 side of the horizontal part. Eight plants were placed in a damp 

 Chamber and tied to wires so that they grew erect, and eight 

 plants placed in the same conditions but without support. The 

 latter plants developed in every case buds while none of those 

 erect did so. 



