Other Characters hi Oenothera Lamarckiana. A77 



the commonest. In the first years of my observations 

 in the field I made careful notes on the mode of fascia- 

 tion. There were 20 cases. Of these 14 had split stems 

 (of which one was split twdce) ; 5 formed narrow 

 ''bands," and in only one of them was the top of the stem 

 really broad. These figures are sufficient to show that 

 the distribution of the frequencies of the various degrees 

 of development of this abnormality will form a half 

 Galton-curve. 



I first found fasciations in the field at Hilversum 

 1886, in a flowering plant and in a dead one of the ])re- 

 vious year (1885). I found them again in 1887, 1888, 

 1889, 1892 and 1893 — altogether 15 cases, which were 

 all found in one and the same corner of the field. In 

 1894 the fasciations were much more numerous and scat- 

 tered over the whole field ; I myself observed six cases ; 

 further ones were observed by others. I observed two 

 cases of fasciation in 1888 in a garden which I had then 

 at Hilversum : one was a plant, which I had raised from 

 a seed which had given rise to a tricotyl in 1887, and had 

 a stem which split twice successively ; the other was a case 

 of fasciation of a three-year-old plant which was planted 

 as a rosette in the garden in 1887. 



In 1894 I found an example of O. brevisfylis with a 

 narrow fasciation and a case in O. laevifolia was also 

 brought to me. 



In my cultures the following cases occurred. I had 

 three cases in the Laniarckiana-i?iVL\\\y (p. 224) in two 

 annual dwarfs in 1888 and 1890 respectively; neither of 

 them were grown to maturity. In 1889 there occurred 

 in this family a biennial plant of 0. lata which bore two 

 split lateral twigs. Fasciation also occurred in the lata- 

 family itself (p. 285), but not until the third generation 



