EARLY SPECIFIC NAMES -'III 



One of these Bpeciea I Bhall now call Bubus invisus (p. '.',7 i , it 

 being the plant which I have formerly described as Bubus Cana- 

 densis var. inrim. There can be no doubt, 1 think, of the distinct- 

 ness of this Bpecies from the common dewberry. Of the nn rit < 

 of the other Bpecies, I am not bo well convinced, although from 

 a study of materia] from several sources, I have decided to 

 separate it as a species. It is the form which Ims been described 

 by Torrey and Gray as Bubus villosusv&r. humifusus (see Pig. 77. 

 page 353). This plan! lias been recognized by Britton as specifi- 

 cally distinct, and he lias named it Bubus Bailey anus. As before 

 saiil. however, this is the planl which Trattinnick lias de- 

 scribed as Bubus Enslenii, and this name must stand. There 

 are still two or three forms of the common dewberry of the 

 North which may need to be separately named, and I Buspecl 

 that in the near future oik- or two of them will be elevated t<> 

 Bpecific tank. < me is the plant which I formerly described as 

 var. roribaccus, and the other is now described by Professor 

 Card, from notes in my herbarium, as var. ifichiganensis (p. :;7> . 



The history of Bubus Enslenii l>ritiL r ^ up an interesting 

 question in respect to the variation of the high-bush blackberry. 

 Torrey supposed this t.. be a form of the common blackberry; 

 and it has been generally considered by botanists that the high- 

 bush blackberry has trailing forms (p. 352). As a matter of fact, 

 however, it has not. There an' certain hybrids between the dew- 

 berry ami high-bush blackberry, bul they are so distinct in their 

 characters as to lie easily recognized. It was one of the-,. 

 hybrids which Willdenow had when he made the name Bubus 

 keterophyllus. The name was published with no description, 

 mi that it is not allowed to stand in botanical nomenclature. 



The following running >ketrh will enable as to understand 

 the botanical characters of the Bast-American blackberries and 

 dewberrii 



D ■ > i. : plants trailing, or at most slightly ascending, 



a unity in,, ii in/ lit/ in, ,1 us ni tips. 

 B. Fruit normally black (sometimes running into whiU fomu 



o. /•/ ,i,i, , ral-floun mi. 



i i; ins vn.t.Msi - Alton, Hort. Kew. Ii. 210 (1789 /.'. Cana- 



. author-, not I, inn. Common dewl.en;. I 71. M 



A strong (Trowing prickly plant, mostly with glabrous stems, 



