I9I5] 



BARTLETT— MUTATION IN OENOTHERA 



93 



show the complete identity, at this stage of growth, of different 

 individuals of mut. nitmmularia, and also the great uniformity of 

 the typical plants of the culture. 



Lex/rT^i^on C /s/: pan 



Fig. 5. — Fi progeny of Ociwlhera praliiicola, Lexington C, pan i: the only muta- 

 tion shown is Lexington C-io, mut. niimnuilaria; the other phmts arc typical O. 

 pratincola; about the same age as the plants shown in fig. 3. 



In addition to the 4 plants of mut. nummnlaria which were dis- 

 covered in the second sowing, there were solitary specimens of each 

 of two other mutations, one plant (no. 12) like no. 7 of the first 

 planting, and another (no. 18) unlike an3'thing else in the culture. 

 No. 18 had exceedingly narrow, red, subulate seedling leaves and 



