310 RyDBERG: STUDIES ON THE ROCKY MOUNTAIN FLORA 
apex; stem leaves few, spatulate or oblanceolate, much smaller; 
bracts linear or linear-oblanceolate, arcuate-recurved, spinulose- 
tipped; involucre cylindroprismatic, 5 mm. long, angled and 
grooved, strigose; lobes 6, subulate, recurved, spinulose-tipped, 
the alternating ones somewhat narrower; perianth about 2 mm, 
long, lobes ovate; stamens mostly 3 (?); filaments adnate to the 
lower part of the perianth. 
This species is related to C. brevicornu Torr., and Torrey and 
Gray included doubtfully Watson’s specimens in that species.* 
It differs in its broader lower leaves and its strict erect branches. 
Ipano: Big Butte Station, June 23, 1863, Edward Palmer 230 
(type, in herb. Columbia University). 
NeEvapA: 1875, J. G. Lemmon; Big Bend of the Truckee, May 
1868, S. Watson 1044. 
CHENOPODIACEAE 
“Chenopodium pratericola sp. nov. 
Annual; stem 3-6 dm. high, striate and angled, nearly glabrous; 
leaves petioled; blades oblong, lanceolate, or elliptic, 2-6 cm. long, 
4-18 mm. wide, entire or with a short tooth on each side, usually 
callous-mucronate, green and nearly glabrous above, more oF és 
mealy beneath, usually distinctly 3-nerved at the base; flowers 1 
small clusters forming rather dense spikes or panicles; sepals 
scarious-margined, green on the back, slightly carinate; seeds 
easily separating from the pericarp, black, shining, about 1.5 ™™- 
in diameter. 
This has been included in C. leptophyllum (Moq.) Nutt. by 
most botanists although sometimes confused with C. oblongifolium 
(S. Wats.) Rydb. on account of its broad leaf blades. It differs 
from the former in its broader leaves, which are practically glabrous 
on the upper side, distinctly 3-nerved at the base, and at least the 
larger ones often toothed on the margins. From the latter it 
differs in its thin, more glabrate leaves and less dense inflorescence. 
Kansas: Riley County, August 2, 1895, J. B. Norton 436 (tyPe 
in herb. N. Y. Bot. Garden). 
NesrasKa: Middle Loupe River, near Thedford, June 21) 
1893, Rydberg 1386; Forks of Dismal River, July 11, 1893: Rydberg 
1535; Kearney County, June 13, 1891, Rydberg 318. 
Missourtr: Courtney, June 25, 1896, Bush 307. _ a 
* See Proc. Am. Acad. 8: 196. 1870. - 
