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broadscale, mound saltbush, New Mexico saltbush, silver saltbush

leafcover saltweed, Truckee orach

Habit Subshrubs, dioecious, clump forming, mainly 2–8 dm and as wide, woody at base. Herbs monoecious (or entirely pistillate), erect, much-branched, rounded, bushy, 0.5–6 dm.
Stems

stiffly erect;

branchlets terete.

mostly ascending, terete.

Leaves

tardily deciduous, alternate or proximal-most subopposite, shortly petiolate;

blade gray green, oblong-ovate to elliptic or orbiculate, 8–30(–35) × 6–20 mm, margin entire or rarely dentate, apex rounded to retuse or obtuse.

petiole 0.3–2 cm;

blade 10–50 × 5–25 mm, base varying from shortly hastate to truncate or cuneate.

Staminate flowers

yellow, in clusters 2–3 mm wide, borne in panicles 6–30 cm.

in small to moderate, axillary glomerules near ends of branches, or in bracteate terminal spikes.

Pistillate flowers

in small, very numerous glomerules in axils of elongated, terminal leafy-bracteate spikes or finally paniculate.

in axillary clusters.

Seeds

brown, 2.4–2.8 mm.

brown, 1.2 mm.

Fruiting

bracteoles sessile or substipitate, 4–5 × 5–9 mm, base broadly cuneate, margin sharply toothed, apical tooth subtended by 2–6 equal or smaller teeth, faces smooth or rarely tuberculate.

bracteoles lanceolate or oblong, 5–14(–20) mm, sharply lobed to tuberculate at base, also often sharply cristate below usually attenuate apical lobe;

tips widely recurved-spreading.

Atriplex obovata

Atriplex phyllostegia

Phenology Flowering summer–fall. Flowering Apr–Aug.
Habitat Fine-textured substrates, with salt desert shrub and lower pinyon-juniper communities Valley bottoms, silty or clay, less commonly, sandy alluvium with greasewood
Elevation 1500-2000 m (4900-6600 ft) 1200-1500 m (3900-4900 ft)
Distribution
from FNA
AZ; CO; NM; TX; UT; Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
NV
[WildflowerSearch map]
Source FNA vol. 4, p. 371. FNA vol. 4, p. 368.
Parent taxa Chenopodiaceae > Atriplex > subg. Pterochiton Chenopodiaceae > Atriplex > subg. Obione > sect. Phyllostegiae
Sibling taxa
A. acanthocarpa, A. amnicola, A. argentea, A. californica, A. canescens, A. confertifolia, A. cordulata, A. coronata, A. corrugata, A. coulteri, A. covillei, A. dioica, A. elegans, A. fruticulosa, A. gardneri, A. garrettii, A. glabriuscula, A. gmelinii, A. graciliflora, A. heterosperma, A. holocarpa, A. hortensis, A. hymenelytra, A. joaquiniana, A. klebergorum, A. laciniata, A. lentiformis, A. leucophylla, A. lindleyi, A. linearis, A. littoralis, A. matamorensis, A. mucronata, A. nudicaulis, A. nummularia, A. oblongifolia, A. pacifica, A. parishii, A. parryi, A. patula, A. pentandra, A. phyllostegia, A. pleiantha, A. polycarpa, A. powellii, A. prostrata, A. pusilla, A. rosea, A. saccaria, A. semibaccata, A. serenana, A. spinifera, A. suberecta, A. suckleyi, A. tatarica, A. torreyi, A. truncata, A. tularensis, A. watsonii, A. wolfii, A. wrightii
A. acanthocarpa, A. amnicola, A. argentea, A. californica, A. canescens, A. confertifolia, A. cordulata, A. coronata, A. corrugata, A. coulteri, A. covillei, A. dioica, A. elegans, A. fruticulosa, A. gardneri, A. garrettii, A. glabriuscula, A. gmelinii, A. graciliflora, A. heterosperma, A. holocarpa, A. hortensis, A. hymenelytra, A. joaquiniana, A. klebergorum, A. laciniata, A. lentiformis, A. leucophylla, A. lindleyi, A. linearis, A. littoralis, A. matamorensis, A. mucronata, A. nudicaulis, A. nummularia, A. oblongifolia, A. obovata, A. pacifica, A. parishii, A. parryi, A. patula, A. pentandra, A. pleiantha, A. polycarpa, A. powellii, A. prostrata, A. pusilla, A. rosea, A. saccaria, A. semibaccata, A. serenana, A. spinifera, A. suberecta, A. suckleyi, A. tatarica, A. torreyi, A. truncata, A. tularensis, A. watsonii, A. wolfii, A. wrightii
Synonyms A. greggii, A. jonesii, A. obovata var. tuberata Obione phyllostegia, A. draconis, A. phyllostegia var. draconis
Name authority Moquin-Tandon: Chenop. Monogr. Enum., 61. (1840) (Torrey ex S. Watson) S. Watson: Proc. Amer. Acad. Arts 9: 108. (1874)
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