﻿Rydberg: Notes on Rosaceae 127 



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

 Kitts, and Porto Rico. 



Idaei 

 • r'^is group consists of the section Idaeanthi of Focke's sub- 

 genus rt^eahatus and Greene's genera Mehinobatus 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 -8i lllii|^BHM B^ Jt is impossible 

 for me to follow him in the segrefMflHW^Hftlecies of Batidaea. 

 Many of'them are based on only occasimM^pllmormal forms or 

 mere individual variation. Except two of his speci.?s of Batidaea 

 (viz., B. arizonica and B. Itascica) and Rubus idaeus, the\' 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 & Rollick. 



Connecticut; Fairfield, Eames 5532. 



District of Columbia: Eckington, 1897, Irwin. 



Pennsylvania: Lancaster County, 1911, Carter. 



Rubus ellipticus 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 ofT as a 

 thimble, this species would be included in the Adenotricki group 

 of blackberries. To this belongs the following specimen : 



Jamaica: Cinchona, igo^, Harris qiji. 



Rubus glaucus Benth. This was originally described from 

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



