132 BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 
flowered, short, slender-pediceled racemose corymb, often naked, 
but sometimes bracted below with unifoliate leaves; pedicels 
erect or ascending, very slender, minutely villous-pubescent and 
usually bearing some minute prickles; calyx pubescent externally, 
whitened-tomentulose within, the lobes oblong to lanceolate- 
oblong, apiculate or with a short linear acumination; flowers of 
medium size or rather small; fruit ovoid-oblong, becoming rather 
large, 2 cm. long by 1.5 cm. thick, rather large-seeded and subacid, 
the carpels glabrous or nearly so. 
Frequent in dry open ground or in pine groves. First flowers 
June 7, 1908, June 10, 1909; still some flowers June 22, 1910; 
ripe fruit August 7, 1906. 
A plant not less perplexing than others of its immediate group, 
in some of its forms approaching very near to R. Enslenii, in other 
forms showing near relationship to R. flagellaris. From the former 
it differs in its larger size and often stronger and more numerous 
prickles, shorter petioles, broader, more cuneate and more abruptly 
acuminate leaflets, often subviscid to the touch, and more numerous 
smaller flowers in subcorymbose racemes. It isa smaller and more 
pubescent plant than R. flagellaris, with weaker prickles, thinner, 
more coarsely and acutely cut, and more cuneate leaflets, less 
leafy racemose inflorescence of very slender-pediceled flowers, 
the carpels glabrous or with an occasional pilose hair. 
* RuBUsS BAILEYANUS X FLAGELLARIS. 
At first ascending, finally long-trailing and rooting at the tip; 
shoots obscurely angled, becoming subterete, often somewhat 
branched, armed, often very unevenly so, with rather numerous 
short, sharp, retrorse or decurved, weak prickles; primary leaves 
3-foliolate, or the later ones occasionally 5-foliolate, on thinly 
pubescent or glabrate petioles 4-6 cm. long, which are armed like 
the stem; leaflets rather dull green, paler beneath, often strongly 
purplish tinged, thinly appressed-pubescent on the upper surface, 
softly short-pubescent to glabrate beneath, acutely and often 
very irregularly serrate-dentate or cut-dentate and somewhat 
crenate-lobed; the odd leaflet ovate to obovate-suborbicular, 
rounded or subcordate to somewhat cuneate at the base, acute or 
acuminate at the apex, mostly 5-7 cm. long by 4-6 cm. wide, on 
petiolules 1-2 cm. long; lateral leaflets subsessile to distinctly 
stalked, mostly rhombic-ovate to ovate-oblong and inequilateral, 
with a broad basal lobe; flowering branchlets slender, 6-20 cm. 
long, pubescent or glabrate, unarmed or with some minute scattered 
