358 



Tricolyloiis Races. 



Henii-tricotyls and tetracotyls are, as we have al- 

 read)' stated, as a rule rarer than tricotyls, even when we 

 inckide all the juiims and phis variants of these groups. 

 This can be observed in bought samples of seed ; but 

 better if we sow the seed of plants grown from such a 

 sample separately. Thus, for instance, I found in 1892 

 among the seeds of a plant of A spent I a azurca setosa 

 3 hemi-tricotyls, 15 tricotyls and 3 tetracotyls among 

 1170 seedlings, and in the crop derived from another 

 individual of the same culture 2 hemi-tricotvls and 5 



Fig. 69. Papaver Rhocas. Semi-double cultivated form. 

 Dicotylous, liemi-tricotylous, tricotylous, tctracotylous, 

 and pentacotylous seedlings; from the seeds of 1899. 



tricotyls amongst 550 seedlings. Further, I found in 

 1892, amongst 13,000 seedlings of Ainarantits spcciosus 

 202 hemi-tricotyls, 245 tricotyls, and 22 tetracotyls and 

 hemi-tetracotyls. In the former group the cleavage was 

 shallow in 47 cases, deep in 97 and intermediate in 58. 

 The same general result was obtained in other plants. 



To obtain a further knowledge of tricotyls and hemi- 

 tricotyls we must cultivate them furtlier, allow them to 

 flower separately, and compare the composition of their 

 progeny with that of the tricotylous individuals from the 



