180 ORIGIN OF NON-SEXUAL CHARACTERS 



mice arising from a cross between an albino and a 

 Japanese waltzing mouse in Darbishire's experi- 

 ment. Since that time, however, the natural dis- 

 tribution and the cultural history of (Enothera has 

 been very thoroughly worked out. (Enothera 

 Lamarckiana is the common Evening Primrose of 

 English gardens. The species of the sub-genus 

 Onagra to which Lamarckiana belongs were originally 

 confined to America (Canada, United States, and 

 Mexico), but Lamarckiana itself has never been 

 found there in a wild state. Attempts, however, to 

 produce it by crossing of other forms have not 

 succeeded, and a specimen has been discovered at the 

 Museum d'Histoire Naturelle at Paris, collected by 

 Michaux in North America about 1796, which agrees 

 exactly with the (Enothera Lamarckiana naturalised 

 or cultivated in Europe. The plant was first 

 described by Lamarck from plants grown in the 

 gardens of the Museum d'Histoire Naturelle, under 

 the name CE. yrandi flora, which had been introduced 

 by Solander from Alabama, but Seringe subsequently 

 decided that Lamarck's species was distinct from 

 grandiflora, and named it Lamarckiana. Gates 

 states that Michaux was in the habit of collecting 

 seeds with his specimens, and that it is therefore 

 highly probable that Lamarck's specimens were 

 grown directly from seeds collected in America by 

 Michaux. Gates considers that the suggestion of 

 the hybrid origin of Lamarckiana in culture is thus 

 finally disposed of. By the year 1805, Lamarckiana 

 was apparently naturalised and flourishing on the 

 coast of Lancashire, and in 1860 it was brought into 

 commerce, probably from these Lancashire plants, 

 by Messrs. Carter. The cultures of De Vries are 



