HOFFMANN: FLORA OF BERKSHIRE COUNTY. 287 



— (jR. idaeus L., var. aculeatissimus Man. ed. 7 in part. R. strigosus 

 111. Fl. ed. 2. Vid. Rhodora, 21 : 96, 1919.) 



Rocky pastures and clearings; common. 



X ? R. neglectus Peck. — Open hillsides and pastures; frequent in 

 the valley. Probably a self-perpetuating hybrid between R. occi- 

 dentalis and R. idaeus, var. strigosus. 



R. nigricans Rydb. — Borders of swamps and wet roadsides on the 

 plateau; occasional. Florida; Washington. 



R. occidentalis L. Black Raspberry; Thimbleberkt. — Open 

 rocky woods, pastures, clearings and roadside thickets; common in 

 the valley. Not noted on the plateau proper. 



R. odoratus L. Purple Flowering Raspberry. — Openings 

 and clearings in rich woods, banks of streams and shaded ledges; 

 common on the upland and in the lower parts of the plateau. Not 

 noted on the summit of the plateau. 



R. pergratus Blanchard. — Rocky pastures, dry open hillsides and 

 moist woodland; common. 



R. plicatifolius Blanchard.— Vid. Rhodora, 8: 149 (1906). 



Roadsides; occasional. Sandisfield; Sheffield. 



A prostrate species related to R. mllosus Ait., distinguished by the 

 straight prickles, the plaited or rufHed margins of the leaves and the 

 fact that its inflorescence is a broad raceme. 



R. pubescens Raf. Dwarf Raspberry. — (E. triflorus Man. ed. 

 7 and 111. Fl. ed. 2; vid. Rhodora, 11: 236, 1909.) 



Rich rocky woods, swamps and wet woods ; common. 



R. recurvans Blanchard. — Open woods, clearings and low ground; 

 frequent. 



R. setosus Bigel.^ Swampy meadows and low ground; frequent 

 on the plateau. 



R. villosus Ait. Dewberry. — {R. procumbens 111. Fl. ed. 2.) 



Dry fields and rocky summits; common. 



var. humifusus T. &. G. — Dry open fields; occasional. Flood- 

 plain of the DeerfieldR., Florida; Stoekbridge; Monterey; Egremont. 



As is well known, the division Eubatus of the genus Ruhus presents 

 a problem of extreme difficulty. Much of the 'Rubu^ collected in 

 Berkshire is not easily determined in accordance with the treatment so 

 far published. Forms are common, particularly on the upland, which 

 might be referred to R. junceus Blanchard or to R. nigricans Rydb. 

 They appear to be hybrids between R. canadensis and R. kispidus. 



