124 BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 
obovate finely dentate-serrate leaflets of the primary leaves, and 
less slender pedicels usually armed with scattered and slightly 
decurved prickles. i 
* R. HISPIDUS X NIGRICANS. 
I place here a plant collected in Trot’s Swamp, June 10, 1908, 
not yet in flower, which is neither R. hispidus nor R. nigricans, 
although combining characters of both and growing with them. 
The stems are rather densely bristly-prickly with some interspersed 
gland-tipped hairs on the growing parts; the leaves are mainly 
trifoliolate, with broad rounded leaflets, which are minutely pubes- 
cent on the veins beneath and crenate-dentate to somewhat crenate- 
lobed; the inflorescence, not fully developed, is a raceme, the 
pedicels subtended by conspicuous greenish bracts, the pedicels 
and calyx bearing some slender setulae and gland-tipped hairs. 
Some of the reddened persistent leaves of the preceding season are 
indistinguishable from similarly persistent leaves of R. hispidus, 
and the racemose inflorescence and slenderly prolonged flowering 
stems seem to belong to that species; on the other hand the imma- 
ture, suberect and angled new stems, some of the leaves, and the 
bracted inflorescence are much more nearly those of R. nigricans. 
* RUBUS HISPIDUS X PROCUMBENS. 
Shoots erect or ascending, the flowering stems prostrate and 
trailing, sometimes greatly elongated; stems greenish to dull 
purple, simple, slender, terete; prickles often bright red-purple, 
either few or numerous, straight, erect or slightly retrorse, acicular, 
often weak, I-5 mm. long, sometimes stouter and decurved from 
a broader base; primary leaves either 3-foliolate or 5-foliolate, on 
slender, ascending, thinly pubescent or glabrate petioles 3-10 cm. 
long, armed like the stem; leaflets of firm texture, rather dark green, 
somewhat shining above, paler beneath, sparsely appressed- 
pubescent on the upper surface, minutely pubescent beneath or 
glabrate except on the primary veins; odd leaflet ovate or elliptic 
to obovate, acute or short-acuminate, rounded or subcordate at 
base, its petiolule 1-2 cm. long, the middle leaflets on very short 
stalks; paired leaflets of trifoliolate leaves mostly broadly rhom- 
boid and usually notched or cleft to form a prominent basal lobe; 
flowering branchlets slender, pubescent, unarmed, or with a few 
weak prickles, often zigzag, the largest 2.5 dm. long, commonly 
bearing 2-4 rather distant trifoliolate leaves and one to several 
