THE DEWBERRY TRIBES 331 



dissimilar, and, therefore, not always comparable with 

 each other and not equally adapted to given con- 

 ditions. In fact, they represent various distinct spe- 

 cies, and marked natural or botanical varieties. It is, 

 therefore, necessary, before proceeding to a discussion 

 of their horticultural values, to distinguish their 

 botanical characteristics. A few years ago, I made 

 an attempt to discover the botanical features of the 

 dewberries, and the results were published in the 

 "American Garden" for November, 1890, and Feb- 

 ruary, 1891, the former issue containing the first 

 accurate drawing of the Lucretia. A horticultural 

 and botanical monograph of the dewberries was also 

 the subject of Bulletin 34 (November, 1891) of the 

 Cornell Experiment Station ; and a subsequent sketch 

 was made in Bulletin 117 of same station. The main 

 features of the present account of the dewberries 

 are drawn from those papers. 



In common speech, the word dewberry is applied 

 to any trailing blackberry. There are several distinct 

 species or types of trailing blackberries, with only 

 the most prominent of which we need to concern our- 

 selves at present. It would seem as if the dewberries 

 could be at once distinguished from the true or bush 

 blackberries by their trailing habit, but there are 

 forms of wild blackberries which are low and decum- 

 bent, as we have seen in the account of the hybrid 

 blackberry -dewberry tribe. The botanies have even 

 described a true trailing form of the bush blackberry 

 (var. Jmmifusus), but this variety was founded upon 

 a dewberry itself, and it has now been described as a 

 distinct species under the name of Rubus Bailey anus. 

 It turns out, however, that it was described so long 



