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THE AMERICAN NATURALIST [Vol. XLVI 



employed in my crosses. The most important of these 

 characters are (1) the stem coloration, green punctate 

 with red papillate glands, (2) a broader rosette leaf 

 somewhat crinkled, and (3) broader and larger foliage 

 leaves. The flowers, half again larger than those of 

 biennis A and B, are of a size more favorable to give 

 large-flowered hybrids approaching Lamarckiana when 

 grandiflora is employed as the other parent of the cross. 



Although the differentiation of biennis D as a biotype 

 has marked a great advance in the possibilities of my 

 experimentation, there are undoubtedly other races of 

 biennis which will prove better for my purposes. Thanks 

 to correspondents, I have received seed of biennis from 

 England and the continent that is likely to give types of 

 great interest, and more favorable strains among the 

 American forms are likely to come to hand. There are 

 some beautiful large-flowered English and Dutch forms 

 of biennis which in their broad and crinkled leaves and in 

 their habit are very similar to Lamarckiana, but I have 

 not as yet found among them the stem coloration desired. 

 However, it is to be expected that broad and crinkled- 

 leaved types of biennis will be discovered with red-colored 

 glands upon the stems and ovaries and such forms when 

 crossed with grandiflora are likely to give the hybrids 

 most like Lamarckiana. It will take some time to differ- 

 entiate such strains, but they are certain to exist since 

 these characters are presented in part by various types of 

 biennis. Indeed they seem likely to prove not uncommon 

 judging from the collections that have come to me during 

 the past year from botanists who have kindly interested 

 themselves* in the problem. 



In my previous paper (Davis, '11, p. 201) mention was 

 made of a southern (Enothera (strain S) which appeared 

 in cultures from the wild seed collected by Tracy as 

 (Enothera grandiflora. Further studies have shown that 

 the plant is annual, its rosette being small and transitory 

 as in grandiflora. The form has been described and 

 named (Enothera Tracyi by H. H. Bartlett ( '11). I have 



