122 Shull. 



Nicotiana Tabacum (tobacco)'): — 



Number of leaves > (Hayes 1912, Hayes, East and 



Height of stem J Beinhart 1913) 



Length of leaf i 



Breadth of leaf (Hayes, East and Beinhart 1913) 



Area of leaf j 

 Oenothera (Evening primrose): — 



Red veins of leaves (Heribert-Nilsson 1913)-) 

 PhaseoliLs vulgaris (bean): — 



Length of seeds , „ ,^,,^ ^ . imo^ 



„,. ,, , , (Emerson 1910. Joliannsen 1913) 



\\ idth of seeds I 



Thickness of seeds , ,,. ,,,,,, 



w • 1,. r , (Emerson 1910) 



Weight of seeds ) 



Fisum sativum (pea): — 



Time of flowering'*) (von Tschermak 1911, 1912) 

 Stizolobium (Lyon beans, velvet l)eans): — 



Size of pods i 



Size of seeds ' (data of Belling) (Emerson and East 1913) 



Time of flowering | 

 Triticum vulgare (wheat) : — 



Red grain-color i 



Length of internodes, (^Nilssou-Ehle 1908, 1909, 1911a) 



i.e., density of heads ) 



Beardlessness (Nilsson-Ehle 1908) 



Glume-color i ,.^., ,,, , ,„^,„ 



„.,,., (^Nilsson-Ehle 1909) 



Height of stem > 



Resistance to yellow rust, 



Puccinia glumarum (Nilsson-Ehle 1908, 1911a) 



*) GooDSPEEi) (1912, 191:!) lias demonstrated a notable increase in variability 

 of flower-size in tlie V\ of certain tobacco-hybrids, but refuses to ascribe this greater 

 variability to Mendelian segregation. 



') Hekibert-Nii.ssox assumes that practically all the genetic phenomena of Oeno- 

 thera may be explained on the basis of plural Mendelian determiners, but gives no 

 relevant data except for the red nerves of one of his mutant forms. To one who is 

 familiar with the genetic phenomena in Oenothera his conclusions in this regard must 

 appear premature. 



') Keebi.e and Peli.ew (1910) liave also interpreted the inheritance of time of 

 flowering as well as height of plants of Pisum on the basis of several Mendelian deter- 

 miners affected by partial coupling, but assign definitely diverse functions to these 

 several determiners. 



