49, KEY TO BRITISH RUBI. 
It has a phe bluntly angular subglabrous and almost polished st., 
with more crowded broader-based patent prickles, and a longer 
narrower more prickly and more leafy pan., with the upper Canes 
somewhat fasciculate; while in other respects it seems hardly 
distinct from the small-flowered forms of R. Balfourianus. A some- 
what similar plant occurs at Evershot, Dors 
The “Rf. altheifolius Host.” of British Rubi and Bab. Man. 
seems of too indeterminate a character to claim a place in our list 
at present; while the name ‘“ R, deltoideus Mill.,’ which takes its 
place in Lond. Cat. ed. 8, belongs, Dr. Focke assures me, 
hybrid, “* R. cesius x tomentosus,” ae we cannot expect to find in 
Britain, where R. tomentosus is unknow 
86. R. cxstus L.—St. prostrate a a low arch, round, usually 
slender and very glaucous, with small scattered subulate declining 
or deflexed prickles ; hairs, stalked glands, and acicles usually very 
few. almost always 3-nate. Lts. green on both sides (except in 
var. peoude: Ideus), unevenly incise-serrate, or rarely doubly serrate ; 
— — rhomboidal- -ovate, or 3- lobed ; lateral usually bilobed, 
Pan. lax, usually sm small, often nearly racemose wit 
ae ‘long. ‘stalked fl. Sep. oe ovate-aeuminate with long point 
This species hybridises so freely, that its numerous forms hardl 
admit of exact distinction. ow scarcely anything of the 
following vars., or their distribution. For synonymy, &c., see 
phys — 1886, p. 286, and Engl. Bot. eta to 8rd ed., 
a. aquaticus W. & N.; umbrosus Reich. ; agrestis Bab.—St. very 
slender, glaucous-green. Prickles few, very small.  Lts. thin, 
lobate-serrate ; term. rhomboidal-ovate-acuminate, rounded below. 
Pan. « often nearly simple, and, when otherwise, the 
branches are rarely one than once divi ed.’ ‘ 
fi. tenuis (Bell Salt.). R. degener P. J. Muell. ? — St. very 
slender. Prickles neny small, stout, mostly equal, much deflexed 
from considerably enlarged bases. Lts. rather doubly than lobate- 
ras bess obovate- acuminate, always narrowed below 
is Wallr. ; ligerinus Genev. ; ; ulmifolius Bab. —St. often 
not so gee as in a. and. b., 
d. intermedius Bab. — St. thicker, ae Prickles 
many, slender, pile unequal, subpatent. LL. 5-nate. Lis 
erm. triangular-cordate- a 3-lobed or divided 
into 8 sessile ies Stalked <sed se acicles few (as in a., b., and ¢.), 
but ue ~ stouter. Conn 
with e 
e udo-Ideus (Lej.). — are eather thick. Prickles ee 
violet- valewred anys L. 8-nate or 4-nate- -pinnate. Lts, ashy- 
anus ath. Obviously R. casius x — 
ispidus & N.; serpens Godr. rye St, slender, green. 
Lts. Sit serrate; term, obovate-acuminate, subcordate; lateral 
