Rydberg: Notes on Rosaceae 127 



on several of the West Indian islands, such as Guadeloupe, St. 

 Kitts, and Porto Rico. 



Idaei 



This group consists of the section Idaeanthi of Focke's sub- 

 genus laeohatiis and Greene's genera Melanohatus and Batidaea. 

 Greene admitted seven species of the former and eighteen species 

 of the latter, if Ruhus idaeus, which he evidently regarded as the 

 type but did not name under Batidaea, is counted. It is impossible 

 for me to follow him in the segregation of these species of Batidaea. 

 Many of them are based on only occasional or abnormal forms or 

 mere individual variation. Except two of his species of Batidaea 

 (viz., B. arizonica and B. Itascica) and Rubus idaeiis, they may all 

 be regarded as geographical varieties or subspecies of R. strigosus. 

 Batidaea arizonica Greene is the best of all the species proposed 

 and, in whatever way the others may be treated, this I think should 

 under all circumstances be regarded as a distinct species. Batidaea 

 Itascica Greene was based on one single specimen which I can 

 but refer to the European Rubus idaeus, which is escaped in this 

 country. See further remarks under the different species of the 

 group. 



Rubus phoenicolasius Maxim. This is in cultivation and has 

 been naturalized in the eastern States. It is distinguished from 

 our native species in the densely red-bristly stem and the small 

 red incurved petals. The following specimens have been seen : 



New York: Spuyten Duyvil, Rydberg. 



New Jersey: Little Silver, 1890, Lorett; Atlantic Highlands, 

 1906, Britton cf Hollick. 



Connecticut: Fairfield, Eames 5532. 



District of Columbia: Eckington, 1897, Irwin. 



Pennsylvania: Lancaster County, 1911, Carter. 



Rubus ellipticiis Smith. This is also in cultivation in warmer 

 parts of North America and has established itself in the West 

 Indies. If it were not for the yellow fruit, which comes off as a 

 thimble, this species would be included in the Adenotrichi group 

 of blackberries. To this belongs the following specimen : 



Jamaica: Cinchona, 1905, Harris 913 1. 



Rubus glaucus Benth. This was originally described from 

 Ecuador, but has since been found in Colombia and Costa Rica. 



