304 RypBERG: STUDIES ON THE ROCKY MOUNTAIN FLORA 
Salix Sandbergii sp. nov. 
Bark of the branches reddish chestnut brown, finely puberulent 
when young; leaves oval or elliptic, 2-4 cm. long, densely white- 
silky on both sides, grayish above, silvery beneath, entire or 
nearly so; pistillate aments sessile, naked, about 4 cm. long; 
bractlets purple, obovate-spatulate, 3 mm. long, white-pilose; 
capsule glabrous, 4-5 mm. long; stipe about 1.5 mm. long; style 
about 0.5 mm. long; lobes of stigma short. 
The type was distributed as Salix lasiolepis Benth., to which itis 
not at all closely related. The leaves resemble somewhat those 
of S. sitchensis Sanson and S. bella Piper, but the capsule is glabrous 
and the plant belongs to the S. cordata group. On account of the 
white leaves it would be placed next to S. Hookeriana Barrett, 
but the leaves are silky, not villous, and entire, and the aments 
and capsules are much smaller. It grows on banks of streams. 
_ Ipano: Valley of Hatwai Creek, April 28, 1892, Sandberg, 
MacDougal & Heller 71 (type, in herb. N. Y. Bot. Garden). 
The following species of willows are here recorded for the 
Rocky Mountain region: Salix erythrocoma Barrett (5. arguia 
erythrocoma Anderson), S. lucida Muhl., S. Hookeriana Barrett, 
S. conjuncta Bebb, S. MacCalliana Rowley, S. alexensis (An- 
ders.) Coville, S. Barrettiana WHook., S. Seemanti Rydb., S. 
Drummondiana Barrett, S. arbusculoides Anders., 5. desertorum 
Richards., S. saskatchewana Seem., and S. Fernald Blankinship, 
from the Canadian Rockies south of the 55° parallel; and S. com- 
juncta Bebb and S. Fernaldii Blankinship also from Montana. 
ULMACEAE 
Celtis rugosa sp. nov. 
A tree, 5-10 m. high, with rounded crown; bark 
twigs brownish, pubescent when young; petioles 6-10 ™™: 
leaf blades broadly ovate, oblique, 4-7 cm. long, somewhat ieee 
at the base, short-acuminate, sharply serrate except at the tly 
and at the apex, coriaceous, dark green, very shiny and en 
scabrous above, brownish or yellowish green, dull, pee ng; 
beneath, strongly reticulate and rugose; pedicels 15~25 ite gi 
fruit globose, about 8 mm. in diameter, brownish; style short 
evident. 
This species is related to C. reticulata Torr. but diffe 
gray, corky; 
