242 LEAFLETS. 
A dwarf petrophilous species from head of Pettit Lake, Idaho, 
L. F. Henderson, 1895, n. 3598, as in U. S. Herb. 
B. SANDBERGII. Tall and stout, reddish-hispid as to stem, 
twigs, pedicels, petioles, and even the veins beneath, but prickles 
more uniform than in the last, none as stout, none obviously 
flattened except those of the leaves beneath: leaves of the twigs 
commonly 5-foliolate, deep green on both faces when grown, 
sparsely strigose hairy above, not so beneath ; odd leaflet broadly 
oval to rhomboid-ovate, all merely acute, doubly or simply 
incise-serrate: calyx strongly aculeate and puberulent. 
Packsaddle Peak, Idaho, Aug., 1892, Sandberg, McDougal 
and Heller, n. 859, as in U.S. Herb. 
B. FILIPENDULA. Dwarf, but stout as to the stem, the short 
twigs and long pedicels slender, only the main stem very hispid: 
leaves small, pale beneath, the indument only very obscure except 
in those young and growing: odd leaflet deltoid-ovate to rhom- 
boid, hardly an inch long, acute: fruiting pedicels slender, 
pendulous, aculeolate; calyx seldom bristly, commonly only 
puberulent. 
Lost River Mountains, Idaho, Aug., 1895, L. F. Henderson, 
n. 4039, as in U. S. Herb. 
B. VIBURNIFOLIA. Stem stoutish, tortuous, perhaps tall, 
sparingly hispid; twigs tortuous, thinly and softly hispidulous: 
leaves of a clear bright green on both faces, glabrous above, also 
beneath save as to scattered bristles or slender prickles along 
some veins; odd leaflet deltoid-ovate, 17 inches long, acute, 
sharply serrate, the veins elevated and conspicuous beneath: 
calyx with a few prickles at its base, the segments only puberu- 
lent: fruit uncommonly large, apparently amber-color or yel- 
lowish. 
Selkirk Mountains, B. C., Aug., 1904, C. H. Shaw, n. 472, as 
in U. S. Herb. 
B. suBAROTICA. Stems tall, stout, hispid with rather sparse 
short slender prickles; twigs very leafy, scantily and shortly 
glandular-hispid, the bristles very diverse as to length and 
thickness: foliage firm, dark-green above, much plicate, pale 
