iHH-.. ii.ifl.T .1/-. ISHIKAWA—TJJJ'J JSUMBJ:J: of CHROMOSOME'S. 



■■¥23 



Dry mis Winterii 



Stkashukckk ; Flora. 95. 1905. 



36 



I IVanuncuIaceaej 



Aconitum Napellus 



Paeonia spectabilis 



Overton ; Vierteljahrssch. Naturf. Oesell. 

 Ziirisch. 38. 1893, 

 TroUius europaeus 



LundeCtAkdh ; Svcnsk Hot. Tidskr. 3. 1909. 



Anemone japonica 



Adonis davurica 



Takamine ; Bot. Mag. Tokyo. 30. 1916. 

 Delphinium ajacis 



B6NICKE ; Ber. Deut. Bot. Ges. 24. 1911. 



Thalictrum minum. ... 



T. purpurascens 



Overton ; Ann. Bot. 23. 1909. 

 Helleborus foetidus 



Stkasburger ; Hist. Beitr. 1. 1888., Ann. 

 Bot. 8. 1894. 



Overton ; Jahrb. Wiss. Bot. 42. 1905. 



12 

 12 



8 

 12' 



12 



24 



•^•>: 



-Ve 







■' t^ 



Adonis davurica. He. Heterotypic niftapliase of pollen muther cell. X 1280. 



* The result obtained by the investigator quite agrees with the oiie done by my 

 recent investigation. (Fig. 5) While studying I found a not uninteresting case which 

 is worth mentioning: at the anaphn.se of the heterotypic division of a pollen mother 

 cell \o chromosomes were found grouping together in one pole (Fig. 5. a), while in 

 another, 11 chi'oraosomes were easily to be counted (Fig. 5. 6), which tells the migra- 

 tSnof a certain ehromosome with the homologoub one to the same pole. 



