106 BiICcKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 
*RUBUS ALLEGHENIENSIS Porter. 
Thickets at Watt’s Run, a copiously glandular and pubescent 
form with rather short, closely flowered racemes, and flowers 2—3 
cm. broad; in full flower June 15, 1908. A less glandular and less 
pubescent form at Quaise. 
The Nantucket plant might be more particularly defined as the 
R. nigrobaccus of Bailey, if any distinction is to be made between 
this and R. allegheniensis. 
Rusus arcutus Link. 
R. floricomus Bld. 
R. Andrewsianus Bld. 
Frequent and locally common, but not generally distributed, 
occurring mainly on the eastern side of the island. In full flower 
June 17-28, 1910; fruit ripe Aug. 12,1906. The tallest and finest- 
fruited blackberry of the island, becoming over six feet in height, 
although often much lower and sometimes with widely decurved 
branches. It varies greatly according to its situation, whether 
in dry or moist soil or in sun or shade; leaflets from suborbicular 
with cordate base to lanceolate-oblong and narrowly cuneate, 
sharp-serrulate to coarsely cut-serrate, densely velvety-canescent 
to cinereous-pubescent beneath, the lateral pair slender-stalked 
or subsessile; pedicels naked or well armed even on different parts 
of the same plant. 
Iam indebted to Dr. B. L. Robinson for a carefully executed 
copy of an original tracing by Dr. J. M. Greenman of the type 
specimen of Rubus argutus Link, preserved in the Berlin herbarium. 
This tracing is so closely a counterpart to specimens of the plant 
here discussed, from Nantucket and Long Island, that their 
identity with Link’s species cannot be a matter of any doubt. 
* RUBUS FRONDOsUs Bigelow. 
Common in thickets and open grounds and passing readily 
from one to another form within marked extremes, The leaflets 
may be short and broad or narrow and tapering, and also vary 
greatly in marginal pattern and pubescence, from somewhat 
evenly dentate-serrate to irregularly laciniate and from loosely 
short-pubescent to almost villous beneath. In open sandy fields 
