Parr 1, 1916] CHENOPODIACEAE 47 
Atriplex sordida Standley, sp. nov. 
Erect or decumbent annual, 3-5 dm. high, much branched, the branches stout, terete, 
coarsely and loosely furfuraceous; leaves alternate, sessile, often crowded, the blades ovate-del- 
toid to ovate-orbicular, 1-2.5 cm. long, obtuse or acute and mucronate at the apex, rounded, 
truncate, or subcordate at the base, entire, or angulate near the base, thin, densely and coarsely 
whitish-furfuraceous; flowers monoecious, in dense axillary glomerules, sometimes also forming 
stout dense naked spikes 1 cm. thick; calyx 5-cleft; fruiting bracts sessile, cuneate-orbicular, 
3.5-6 mm. long, united to the middle, the herbaceous margins coarsely dentate, the sides 
coarsely tuberculate or bearing several herbaceous appendages, rarely unappendaged, coarsely 
furfuraceous; seed brown, 1.5 mm. long, the radicle superior. 
Type collected in the San Jacinto Valley, California, in 1880, G. R. Vasey 549 (U.S. Nat. Herb. 
no, 48312). 
DISTRIBUTION: Riverside and Los Angeles counties, southern California. 
22. Atriplex expansa S. Wats. Proc. Am. Acad. 9: 116. 1874. 
Obione argentea Torr. Bot. Mex. Bound. Surv. 182. 1859. Not O. argentea Moq. 1840. 
Annual or perennial, 3-6 dm. high and forming clumps 3-10 dm. broad, intricately 
branched, the branches slender or stout, sharply angled, sparsely furfuraceous when young, 
glabrate and stramineous in age; leaves alternate, distant, the lower short-petiolate, the upper 
sessile; leaf-blades deltoid, narrowly deltoid, rounded-deltoid, or rounded-ovate, often sub- 
hastate, 1.5—4.5 cm. long, narrowed to an obtuse apex or broadly rounded, truncate at the base 
or subcordate and clasping, entire or undulate, thin, sparsely and very closely furfuraceous or 
glabrate; flowers monoecious, in small axillary glomerules, or the glomerules in short naked 
terminal spikes; calyx 5-cleft; fruiting bracts subsessile or usually pedicellate, cuneate-orbicular, 
5-7 mm. long, compressed, united nearly to the apex, the free margins obtusely dentate, the 
sides tuberculate or bearing dentate green crests, or unappendaged; seed brown, 2 mm. long, 
the radicle superior. 
Tvez Locality: Bottoms of the Rio Grande, western Texas. 
Distrisution: Alkaline valleys, western Texas, southern New Mexico, and northern Chihuahua. 
ILLUSTRATION: Britt. & Brown, Ill. Fl. f. 1382. 
23. Atriplex mohavensis (M. E. Jones) Standley, sp. nov. 
Atriplex expansa S. Wats. Proc. Am. Acad. 9: 116, in part. 1874. 
Atriplex expansa mohavensis M. E. Jones, Contr. West. Bot. 11: 20. 1903. 
Erect or spreading annual, 2-5 dm. high, much branched, the branches slender or stout, 
obtusely angled, furfuraceous; leaves alternate, the lower ones short-petiolate, the upper 
sessile; leaf-blades rounded-deltoid, triangular-ovate, or broadly ovate, 1-7 cm. long, rounded 
to acute at the apex and mucronulate, truncate or sutbcordate at the base, the uppermost smaller 
and often clasping, entire or somewhat sinuate-dentate or undulate, thin, sparsely furfuraceous 
or rarely densely so, usually glabrate in age; flowers monoecious, the staminate glomerules 
axillary or in slender, naked, simple or paniculate, terminal spikes, the pistillate flowers in 
axillary fascicles; calyx 5-cleft; fruiting bracts sessile, cuneate-orbicular, 3-5 mm. long, united 
to above the middle, compressed, the free margins green, acutely dentate, the sides usually 
unappendaged, sometimes tuberculate or bicristate, the crests dentate; seed brown, 2 mm, 
long, the radicle superior. 
Tyee LocaLity: Mojave Desert, California. . . 
DistRIBUTION: On alkaline plains and sandy beaches, central and southern California. 
ILLUSTRATION: Bull. U.S. Dep. Agr. Bot. 27: pl. 5, f. 4 (as A. expansa). 
24. Atriplex Rydbergii Standley, sp. nov. 
Erect annual, simple or branched at the base, much branched above, the branches ascend- 
ing, slender, subangulate, densely and coarsely furfuraceous; leaves alternate, the lower ones 
with petioles 3-7 mm. long, the upper very shortly petiolate or subsessile; leaf-blades ovate or 
broadly rhombic-ovate to elliptic or oblong, 1.5—3.5 cm. long, 0.6-1.8 cm. wide, obtuse to acute 
at the apex, cuneate or acute at the base, thin, entire, grayish-furfuraceous, paler beneath; 
