420 Origin of Each Species Considered Separately. 



93). The petiole was very long, gradually merging into 

 the blade of the leaf; the latter attaining its greatest 

 breadth near its rounded apex. 



Another mutant with similar leaves 

 flowered in the same summer; it had 

 little flowers and empty anthers ; but I 

 was not sure whether it belonged to the 

 same type. 



I gave the name 0. fatna to a plant 

 which arose in 1896 from the Lamar c- 

 kiana-idiXmly : it proved a biennial and 

 branched profusely in 1897. It bore 

 numerous inflorescences with green 

 bracts, but no flowers (Fig. 94). 



In the summer of 1896 I had isolated 

 the rosette as a new form; the leaves 

 were oval and obviously different from 

 those of 0. Lamarckiana. It grew vig- 

 orously in the second year, attained a 

 height of about a meter, produced more 

 branches than any other form I have 

 seen and developed the most extraordi- 

 nary profusion of inflorescences. It was 

 not until late in the autumn that it began 

 to develop normal flowerbuds, too late 

 for them to open. 



I have observed isolated examples 

 of similar plants on other rare occasions. 

 My last example is Oenothera siib- 

 ovata which first appeared in 1889; and, 

 afterwards, as isolated examples in various cultures, 

 from time to time. Four of these mutants have flowered ; 

 the rest died in the rosette stage. • 



Fig. 94. Oeno- 

 thera fatua. A 

 branch in au- 

 tumn with nu- 

 merous flower- 

 less bracts. 



