62 NORTH AMERICAN FLORA [VoLumE 21 
white-furfuraceous, often tinged with purplish-red, the uppermost blades smaller, oval to 
elliptic or oblanceolate, sessile or subsessile, acute or acutish, mucronulate ; flowers dioecious, 
the staminate in large glomerules arranged in slender or stout, interrupted, terminal, simple or 
paniculate spikes, the pistillate flowers in small axillary glomerules forming leafy or naked, 
simple or paniculate spikes; fruiting bracts 2-3 mm. long, united except at the apex, subglo- 
bose or ovoid in age, very spongious, often tinged with red, with a few deep or shallow teeth 
at the apex, the sides slightly tuberculate or often not appendaged; seed 1 mm. broad, the 
radicle superior. 
Typk LocaLity: Magdalena Bay, Lower California. 
DistRIBuTIon: Seacoast of Lower California and Sonora, and on the adjacent islands. 
73. Atriplex Sonorae Standley, sp. nov. 
Perennial from a fruticose base, much branched, the branches erect or decumbent, 3-6 
dm. long, stout or slender, terete, densely furfuraceous when young, glabrate in age; leaves 
mostly alternate, short-petiolate, the blades suborbicular to rounded-ovate, obovate, oval, 
or oblong-oblanceolate, 1-4 cm. long, rounded to acutish at the apex, mucronulate, cuneate 
or abruptly cuneate at the base, entire, thick and firm, white-furfuraceous; flowers dioecious, 
the staminate glomerules in slender, dense or interrupted, paniculate spikes, the pistillate 
flowers in few-flowered axillary clusters, forming dense or interrupted, nearly naked, narrowly 
paniculate spikes; calyx 5-cleft; fruiting bracts sessile, spongious, 3 mm. long and about as 
wide, united to the middle or lower, the margins green, deeply laciniate-dentate, usually sharply 
mitricate on the sides; seed 1 mm. broad, filling the cavity. 
Type collected in alkaline soil near Empalme, Sonora, Mexico, March 11, 1910, Rose, Standley 
& Russell 12631 (U.S. Nat. Herb. no. 635444), 
Distrisution: In alkaline soil, near the coast of Sonora and Sinaloa. 
XIX. Hymenelytrae. Erect shrubs, densely white-furfuraceous. Leaves alternate, 
petiolate, the blades mostly orbicular, deeply dentate. Flowers dioecious. Fruiting bracts 
orbicular or nearly so, free, entire, unappendaged. Radicle superior. 
74. Atriplex hymenelytra (Torr.) S. Wats. Proc. Am. Acad. 9: 119. 
1874. 
Obione hymenelytra Torr. Pacif. R. R. Rep. 4: 129. 1857. 
Erect shrub, 3-10 dm. high, much branched, the branches stout, terete, erect or ascending, 
the young ones densely white-furfuraceous, the older ones dark-gray; petioles stout, half as 
long as the blades or shorter; leaf-blades orbicular to rhombic or rounded-ovate, 1.5-3.5 cm. 
long, often subhastate, truncate or rounded at the base and abruptly decurrent, very thick, 
densely white-furfuraceous, deeply and irregularly dentate, the teeth triangular, acutish; 
flowers dioecious; staminate flowers in dense glomerules, these axillary or in paniculate spikes; 
calyx deeply 5-parted, furfuraceous; pistillate flowers in short dense spikes; fruiting bracts 
7-10 mm. long, orbicular to subreniform, short-stipitate, free, entire, thin, densely furfuraceous; 
seed 1.5-2 mm. broad, the radicle superior. 
Tyrer Locatity: Hilly and gravelly places, on Williams River, Arizona. 
DISTRIBUTION: In alkaline soil, southeastern California, western Arizona, and Nevada, 
ILLUSTRATIONS: Pacif. R. R. Rep. 4: pl. 20; Jepson, Fl. Calif. f. 82, a. 
XX. Lentiformes. Tall or low shrubs, copiously furfuraceous, the branchlets often 
spinose. Leaves alternate, petiolate or sessile, the blades broad, entire or nearly so. Flowers 
dioecious. Fruiting bracts small, orbicular or nearly so, sessile or subsessile, entire, dentate, or 
crenulate, the sides smooth. Radicle superior. 
75. Atriplex orbicularis S. Wats. Proc. Am. Acad. 17: 377. 1882. 
Erect perennial, 9-15 dm. high, suffrutescent below, densely branched, the branches 
ascending or spreading, slender or stout, terete, finely grayish-furfuraceous; leaves alternate, 
short-petiolate, the blades deltoid-rhombic to ovate-oblong or oblong, 2-6.5 em. long, obtuse 
or rounded at the apex, mucronate and often emarginate, rounded to cuneate at the base, 
