120 BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 
or 3-foliolate, on loosely pubescent petioles, which are 5—10 cm. 
long and bear slender retrorse prickles and gland-tipped hairs; 
leaflets deep green, broad, rather thin, loosely appressed-pubescent 
on the upper surface, softly subspreading-pubescent beneath, 
dentate-serrate with very acute, somewhat uneven teeth; the odd 
leaflet ovate to obovate-orbicular, abruptly acuminate at apex, 
rounded or subcordate at base, becoming 5-6 cm. long by 4-5 cm. 
wide, its stalk 1.5-2 cm. long; middle leaflets not so broad, often 
somewhat rhombic, subsessile or short-stalked; inflorescence 
a short raceme or partial corymb terminating a broadly leafy 
branch bearing several trifoliolate coarsely dentate leaves and one 
or more conspicuous suborbicular and cordate unifoliate leaves; 
axis and pedicels villous-pubescent, invested with unequal spread- 
ing bristles and gland-tipped hairs; pedicels slender, 1-3 cm. long, 
axillary from conspicuously green, entire or 3-cleft bracts, or the 
lower from unifoliate leaves; sepals villous-pubescent, minutely 
setulose and glanduliferous; flowers of medium size, the petals 
sometimes sharply denticulate and fringed above with woolly 
airs. 
A well-established colony near Long Pond, also in Trot’s 
Swamp. Not yet in flower June 1, 1909; first flowers June 10, 
1908; passing out of bloom June 22, 1910. 
* RUBUS FRONDOSUS X HISPIDUS. 
R. biformispinus Bld. 
Very variable; erect and 3-10 dm. high to ascending and re- 
curved, or the flowering stems and branches declined and trailing; 
stems greenish purple to dull purple, simple or sparingly branched, 
slender, slightly angled, especially above, or terete; prickles few 
or numerous, variable in size and shape, mostly straight and erect, 
the largest becoming 4-6 mm. long, from a stout, much broadened 
base, and usually scattered, those of smaller size, when present, 
often numerous, sometimes even borne on the broadened bases of 
the larger ones, very unequal, many being reduced to mere 
swellings of the epidermis, others slender and passing into short 
bristles or gland-tipped hairs; primary leaves 3-foliolate or, on 
stouter plants, 5-foliolate; the petioles slender, becoming 10 cm. 
long, loosely pubescent and bearing decurved prickles and some- 
times scattered gland-tipped hairs; leaflets rather deep green, 
often thickish and somewhat shining above, thinly appressed- 
pubescent on the upper surface, pubescent beneath with shorter 
subappressed hairs or glabrate, acutely and somewhat irregularly 
serrate or dentate-serrate, abruptly short-acuminate, the odd 
leaflet broadly ovate or ovate-oblong to elliptic or elliptic-obovate, 
