HOFFMANN: FLORA OF BERKSHIRE COUNTY. 287 
— (R. idaeus L., var. acideatissimus 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 \alley. Probably a self-perpetuating hybrid between R. occi- 
dentalls 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; Thimblp:berry. — 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. vUlosus Ait., distinguished by the 
straight prickles, the plaited or ruffled margins of the leaves and the 
fact that its inflorescence is a broad raceme. 
R. pubescens Raf. Dwarf Raspberry. — {R. 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. i^rocuinbcits 111. Fl. ed. 2.) 
Dry fields and rocky summits; common. 
var. humifusus T. &. G. — Dry open fields; occasional. Flood- 
plain of the Drerficld R., Florida; Stockbridge; Monterey; Egremont. 
As is well known, the division Enlndus of the genus Huhus presents 
a problem of e.xtrcme difficulty. Much of the Rubiis 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. junccus Hlancliard or to R. nigricans Rydb. 
They appear to be liybrids Ix'twccn l{. r(;/;ar/r/(.s'/V and R. hispidus. 
