384 



24 individuals (7 n.mac: 17 mac). 



Some of these individuals have apparently become rather 

 constant already and others segregated further. 



All this is an evidence of the hybrid origin of the two mother 

 piants to sowings V. 246 and V. 247. 



2. Synthetic evidence. 



As mentioned in my first paper, I crossed different types of 

 V. tricolor with different types of arvensis. Fi was intermediate 

 in its appearance (in some characters there was full dominance). 

 Fg, obtained in 1922, presented just the same multitudinous types 

 as the populations from nature which I had suspected to be 

 segregations from crosses between arvensis and tricolor. Such a 

 segregation-field resembles just one of the populations I, J, K, 

 M, N or O in table I, page 378. (The detailed results from these 

 experimehts will be published later on, when the results of the 

 inquiry into the behaviour of the chromosomes after the hybridi- 

 zation can be stated). 



3. Cytological evidence. 



In the preliminary note I stated that tricolor had 13 chromoso- 

 somes. As for arvensis., 17 chromosomes were found in several 

 cases, but also types with 15 chromosomes existed. The further 

 investigations have revealed that, as a rule, all relevant and stabil- 

 ized types of tricolor and arvensis have respectively 13 and 17 

 chromosomes. 



Fig. 6 a shows the homotypic metaphasis of an arvensis (parv., 

 albid, n.mac, pinn, foliac) from Tunø (population T, table I, 

 pag. 379). The type of the plant was like fig. 1 e, pag. 365. The 

 divisions here goes on very regularly. 17 chromosomes. 



Fig. 6 b shows the diakinesis of a tricolor (grand, pall, mac, pinn, 

 caespitosa) from S el vig, Samsø (population X, table I). Also 



