ae 
BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 111 
evidence. It was this illustration, in fact, which first drew my 
attention to Willdenow’s species in this connection and when, 
quite unexpectedly, it first met my notice it was impossible not 
to give it instant acceptance as an illustration of the Nantucket 
plant. 
The species is, of course, allied to R. procumbens but differs in its 
softer stems, more sparsely and weakly armed, with smaller 
prickles, darker green and more coriaceous, glabrous or glabrate, 
trifoliolate leaves, which are subviscid to the touch, those of the 
shoots with the leaflets more finely denticulate, more obovate and 
short-acuminate, and often cuneate at base. In its typical form it 
also differs conspicuously in the greatly enlarged unifoliate leaves of 
the inflorescence. The leaves of the season’s shootsin form, color, 
and texture, as well as in their often purplish color, often suggest 
those of R. hispidus, although usually larger, but the cross R. his- 
pidus X procumbens, which thus comes to mind, proves to be actu- 
ally a very different plant. 
* RUBUS ALLEGHENIENSIS X ARGUTUS. 
Erect, recurved above, 0.5-1.5 m. high, becoming widely 
branched; stem purplish, more or less angled and grooved, the 
new shoots and often the prickles sprinkled with minute, reddish, 
sessile glands; prickles numerous or few, slender, 3-5 mm. long, 
or, on stouter plants, becoming broad-based and 10 mm. long, 
straight and erect, on the branches becoming retrorse but scarcely 
decurved; primary leaves 5-foliolate, on slender pubescent petioles 
4-8 cm. long sprinkled with reddish, sessile or occasionally short- 
stalked glands and armed with scattered, retrorse or decurved 
prickles; leaflets thinly appressed-pubescent above, minutely 
soft-pubescent beneath, narrow, lanceolate to oblong-lanceolate 
or ovate-lanceolate, often long-tapering, usually the odd one and 
often the middle pair cordate, unevenly denticulate-serrulate, 
the teeth acuminate, those terminating the larger veins often 
larger and slightly recurved; petiolules slender, opeapes 
glandular like the petioles, those of the odd leaflets 1.5-3.5 c 
long, those of the lateral pair one-third to one-half as long; na 
of the flowering branches usually bearing stipitate glands and 
often somewhat cut-serrate or laciniate; inflorescence of numerous 
short, often closely flowered racemes, which are sessile or ter- 
minate short branchlets, naked or with a few reduced unifoliate or 
trifoliolate léaves below, the axis thinly short-pubescent with 
spreading hairs and invested with numerous minute, short-stipi- 
