66 NORTH AMERICAN FLORA [VoLuME 21 
flowered, axillary, forming elongate, simple or paniculate, leafy or nearly naked spikes; calyx 
5-cleft; fruiting bracts cuneate-orbicular, sessile or pedicellate, 4-5 mm. long, 5-7 mm. wide, 
united to the middle, compressed, the margins herbaceous, irregularly denticulate, the sides 
smooth, or rarely slightly tuberculate; seed 1-1.5 mm. broad, reddish-brown, the radicle 
superior. 
TYPE LocaLity: Winslow, Arizona. 
DistRisuTion: Dry plains and hillsides, northern Arizona and northwestern New Mexico. 
85. Atriplex obovata Mog. Chenop. Enum. 61. 1840. 
Alriplex acanthocarpa Torr. Bot. Mex. Bound. Surv. 183, in part. 1859. 
Atriplex Greggii S. Wats. Proc. Am. Acad. 9: 118. 1874. 
Erect perennial, 1.5-4 dm. high, fruticose at the base or sometimes nearly throughout, 
much branched below, the branches slender or stout, terete, furfuraceous; leaves numerous, 
alternate or the lowest opposite, short-petiolate or sessile, the blades oblong, broadly oval, 
or rounded-ovate, 1-2 cm. or rarely 3 cm. long, 6~13 mm. wide, rounded at the apex, obtuse to 
cuneate at the base, entire, usually thick, densely furfuraceous; flowers dioecious, the stami- 
nate glomerules in slender or stout, axillary and simple or terminal and paniculate, naked 
spikes, the pistillate clusters few-flowered, axillary, forming mostly naked, simple or panicu- 
late spikes; calyx 5-cleft; fruiting bracts cuneate-orbicular, usually sessile, 4-8 mm. long and 
somewhat broader, united only at the base, the margins herbaceous, denticulate, the sides 
sparsely tuberculate or crested near the base, or rarely smooth; seed 1-1.5 mm. broad, reddish- 
brown, the radicle superior. 
TYPE LocaLrity: San Luis Potosi. 
Distrisution: Alkaline soil, western Texas and southern New Mexico to Chihuahua and 
Zacatecas. 
X XV. Corrugatae. Low shrubs, densely white-furfuraceous, Lowest leaves opposite, 
the upper alternate, sessile, the blades narrow, entire. Flowers dioecious. Fruiting bracts 
sessile or subsessile, panduriform, entire, united to above the middle, the sides coarsely tuber- 
culate. Radicle superior. 
, 
86. Atriplex corrugata S. Wats. Bot. Gaz. 16: 345. 1891. 
Atriplex Nuttallit corrugata A. Nelson; Coult. & Nels. Man. 168. 1909. 
Much branched shrub, forming dense mats 3-12 dm. broad, the older branches spreading, 
the young ones erect, 1-2 dm. high, densely furfuraceous; leaves crowded, the lower opposite, 
the upper alternate, sessile, the blades oblong-linear to narrowly oblong, 6-15 mm. long, 
1.5-3 mm. wide, obtuse at the apex, cuneate at the base, thick and firm, grayish-furfuraceous; 
flowers monoecious or dioecious, the staminate glomerules 4-8 mm. in diameter, in slender 
interrupted naked terminal spikes, the pistillate flowers in small axillary clusters arranged in 
stout, dense, leafy, usually simple spikes; calyx 5-cleft; fruiting bracts sessile or subsessile, 
panduriform, 6 mm. long, 4 mm. wide, broadly rounded at the apex or acutish, entire, united 
to above the middle, spongious, with numerous short stout flattened appendages on the sides 
or obscurely tuberculate, smooth near the apex; seed 2 mm. long, reddish-brown, the radicle 
superior. 
Typx LocALITy: Grand Junction, Colorado. 
DisTRIBUTION: Dry plains, western Colorado and eastern Utah. 
X XVI. Nuttallianae. Low shrubs, densely furfuraceous. Leaves alternate, or the lowest 
opposite, sessile or petiolate, the blades narrow or broad, entire. Flowers dioecious. Fruiting 
bracts sessile or pedicellate, usually dentate, united to the middle or higher, little if at all 
compressed,-the sides smooth or tuberculate. Radicle superior. 
87. Atriplex Gardneri (Moq.) Standley. 
Obione Gardneri Mogq. in DC. Prodr. 132: 114. 1849. 
Atriplex Gordoni Hook. Journ. Bot. & Kew Misc. 5: 261. 1853. 
Atriplex fruticulosa Osterhout, Bull. Torrey Club 25: 207. 1898. Not A. fruticulosa Jepson, 1892. 
Atriplex eremicola Osterhout, Bull. Torrey Club 25: 284. 1898. 
Atriplex pabularis eremicola A. Nelson; Coult. & Nels. Man. 168. 1909. 
