Part 1, 1916] CHENOPODIACEAE 17 
half as long as the blades or sometimes longer; leaf-blades rhombic-ovate to ovate-oblong, 
1.2-2 cm. long, obtuse or rounded at the apex, not cuspidate, narrowly or broadly cuneate at 
the base, entire or obscurely hastate, the lobes spreading, thick and fleshy, bright-green, very 
obscurely farinose, even when young, the upper blades little reduced but narrower, mostly 
oblong; glomerules of flowers very small, loosely cymose-paniculate, the branches dichotomous 
or subgeniculate; calyx rather copiously and closely farinose, the lobes oval or ovate, acute 
or obtuse, slightly carinate, completely enclosing the fruit; pericarp closely adherent; seed 
0.5-0.6 mm. broad, the margin obtuse. 
Type collected at Winnemucca Lake, Washoe County, Nevada, altitude 1200 meters, June 3, 
1913, P. B. Kennedy 1993 (U.S. Nat. Herb. no. 692766). 
DIsTRIBUTION: Western Nevada. 
16. Chenopodium albescens Small, Fi. SE. U. S. 385. 1903. 
Erect annual, 4-10 dm. high, much branched, the branches stout, obtusely angled, strongly 
ascending, pale-green, striate, copiously and finely farinose; petioles slender, half as long as 
the blades or sometimes equaling them; leaf-blades broadly rhombic-ovate to oval, 2-4.5 em. 
long, 1.3-2.5 cm. wide, mostly obtuse or rounded at the apex, usually short-cuspidate or apicu- 
late, obtuse to cuneate at the base, irregularly and shallowly sinuate-dentate or sinuate, often 
with only 2 shallow rounded lobes at the base, thick, pale-green and glabrate on the upper 
surface, densely and finely farinose beneath, the blades of the inflorescence smaller, ovate- 
oblong to lanceolate or elliptic, acute or acuminate; flowers in small glomerules, these in short 
stout dense paniculate spikes, the inflorescence usually copiously leafy; calyx densely farinose, 
deeply cleft, the lobes rounded-ovate, slightly carinate, completely enclosing the fruit; pericarp 
free; seed horizontal, 1 mm, long, nearly smooth, black, shining, the margin obtuse. 
Tyre Ltocatiry: About Kerrville, Kerr County, Texas. 
DiISTRIBUTION: In dry soil, western Kansas to western Texas. 
17. Chenopodium atrovirens Rydb. Mem. N. Y. Bot. Gard. 1: 131. 
1900. 
Chenopodium Wolfii Rydb. Bull. Torrey Club 30: 248. 1903. Not C. Wolfii Simonkai, 1879. 
Chenopodium aridum A. Nelson, Bull. Torrey Club 31: 240. 1904, 
Erect annual, 1-5 dm. high, usually much branched, rarely nearly simple, the branches 
slender or stout, ascending, green, striate, glabrate; petioles slender, one third to two thirds as 
long as the blades; leaf-blades broadly oblong to triangular-oblong, oval, or ovate, 1.5—-3 cm. 
long, 5-18 mm. wide, obtuse or rounded at the apex, rounded to cuneate at the base, entire 
or rarely with 2 small rounded lobes at the base, usually thick, thinly farinose beneath when 
young but soon glabrate; inflorescence sparsely farinose, the glomerules large, dense, arranged 
in interrupted paniculate spikes, or the spikes often simple, naked or nearly so; calyx deeply 
cleft, the lobes obovate, rounded or emarginate, white-margined, sharply carinate, completely 
enclosing the fruit; pericarp free; seed horizontal, 1 mm. broad, dark reddish-brown, shining, 
faintly rugulose, the margin obtuse. 
Type Locauiry: Foothills of Electric Peak, Montana. . . 
DISTRIBUTION: Montana to eastern Oregon, Colorado, and California. 
18. Chenopodium Boscianum Mog. Chenop. Enum. 21. 1840. 
Chenopodium polyspermum spicatum A. Gray, Man. ed. 2. 363. 1856. Not C. polyspermum spi- 
catum Mog. 1840. 
Chenopodium album Boscianum A. Gray, Man. ed. 5.407. 1867. 
Botrys Bosciana Nieuwl. Am. Midl. Nat. 3: 275. 1914. 
Slender erect annual, 3-10 dm. high, simple below, sparsely branched above, the branches 
very slender, bright-green, divergent; petioles slender, about half as long as the blades; leaf- 
blades very thin, those of the lower leaves broadly triangular-oblong, 3.5-6 cm. long, obtuse, 
broadly cuneate at the base, sinuate-dentate, those of the upper leaves smaller, lanceolate to 
oblong or ovate, obtuse or usually acute, entire, bright-green on the upper surface, slightly 
paler beneath and very finely and sparsely farinose; flowers solitary or in small clusters ar- 
ranged in very slender, interrupted, very elongate spikes; calyx very sparsely farinose, the 
