SYNOPSIS OF THE FLORA OF COLORADO. 127 
URTICACEAE. 
ae OCCIDENT oe rf _Gr ay 8 a tae p. 443. —Cation City , Bran- 
degee. | pen 
URTICA GRAC ILIS, Ait. Nik Manat £4 444.—Plains of the Platte, 
Coulter 
Urrica A pDioica,L. Gr ay $ Manual, p. 444.—Sierra Madre Range, at 
; 10,000 feet altitude, Coulter 
; Pagr IETARIA PENNSYLVANICA, Mubl. Gray's Manual, p. 446,—Cation 
City, Brandegee. 0 as 
HuMoLS parte s, L. Gray's Manual, p. 446.— Hoopes. Along the 
Platte, Porter. In é ak Madre Range, at 10,000 feet altitude, Coul. 
ter.« Webster Cation, Redfield. 
CUPULIFERE. 
QUERCUS ALBA, L., var. GUNNISON, Torr. Pacif. R. R. Rep. 2, p. 130. 
Shrub 6°-10° high; leaves oblong somewhat coriaceous, with a minute, 
yellowish, downy pu ibescence under reath, 3/-5’ long, with 3-4 pairs me 
rat ther narrow oblong subequal lobes ; lobes auhoneis, obtuse; fruit o 
a long peduncle; cup hemispherical, about 5” broad and 3” deep; pert 
smaller than that of Q. alba, usually 9” oe and 5’ in dia meter, some- 
times much shorter and saan exceeding the cup.—There is a great 
diversity of views among botanists as to the true position of this oak. 
Mr. Watson (Amer, Nat. 7, p. 372) regards it as one of the many varieties 
of Q. spits Torr., but it seems so widely different in the shape and 
section of its leaves and size of the fruit from the figure of that species 
as given in Ann. N. Y. Lye. 2, pl. 4, that we prefer to retain the old 
name fo or the present.—At the base of the foo t-hills, covering the dry 
one The most common scrub-oak. Canby; Hall & Harbour; Porter ; 
Coulte 
: Guus RCOUS Emoryt, Torr., in Emory’s Rep., p. 152, pl. 9. A low shrub; 
: leaves coriaceous, oblong, ‘on ver y Short petioles, 1-2 ‘ long, variable i in 
_ Size, remotely and repandly toothed, or in the younger ones with deeper 
and crowded teeth; teeth short, bristle-pointed; glabrous above, yel- 
ee downy beneath; fruit pedunculate, solitary and in pairs; acorn 
void or ovoid-oblong, mucronate ; the scales appressed. —Caiion City, 
‘Bianitepie: 
CORYLUS ROSTRATA, Ait.—Hall & Harbour, 516. 
BETULACES. 
BETULA OCCIDENTALIS, Hook. Fl. Bor. Am., 2, p.155. Watson in King’s 
Rep., vol. 5, p. 323, pl. 35. Shrub 8°-12° high; branches dark reddish- 
rown, sprinkled with resinous warts ; leaves 1/ -1}/ long, 9’-15” wide, 
thin, broadly ovate, acute, truncate or cuneate at base, smooth above, 
lighter colored beneath, petioles, margins and veins somewhat hairy, 
not punctate, irregularly toothed or serrate, serratures short and g elandu- 
larly mucronate; petioles slender, 3/6’ ‘Tong; fruiting aments eylindri- 
eal, 9-12" Jong; pein suberect, Neate, 3/5! Axa, scales 
cent, ciliate, the lateral lobes div ergent, quadrangu seeds 
Wings twice broader than the bedy.—Hall & Harbour, 518; ¢ anby 
~ Porter. Along the Platte near Denver, Coulter. 
ae Porter. Sierra Madre Range, 
_ ALNus viripis, Ait—Hall & Harbour, 519. f2pove 0G 
- ALNUS INCANA, Willd.—Ute Pass, Porter. 
f 
re tnd 
— 
BETULA GLANDULOSA, Mx.—* Subalpine,” Hail dé a Twin nie 
a apn re on 
