Flora of North America species comparison

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Atriplex truncata

Atriplex linearis

truncate saltbrush, wedge orach, wedge orache, wedgeleaf orache, wedgescale, wedgescale orache, wedgescale saltbush

slenderleaf saltbush, thinleaf fourwing saltbush
Habit Herbs, typically erect. Shrubs dioecious, erect, mainly 10–25 dm; branchlets slender, terete.
Stems

simple or more commonly branched throughout, mainly 2–8(–10) dm, branches mostly obtusely angled;

herbage scurfy, becoming glabrate.

Leaves

alternate or proximalmost opposite, short petiolate proximally, sessile and often cordate-clasping distally;

blade ovate to deltoid or oval, 4–30(–40) × 3–30 mm, base truncate or subhastate to rounded, margin entire or dentate, apex acute to obtuse.

sessile;

blade narrowly linear-elliptic, 10–50 × 2–3 mm, firm, revolute, often acute apically.
Flowers

in axillary glomerules.

Staminate flowers

in glomerules mainly in distal axils;

sepals 3–5.

in glomerules borne in slender interrupted mostly paniculate spikes.
Pistillate flowers

paniculate or in few-flowered axillary glomerules.
Seeds

brown, 1–2 mm wide.

Fruiting

bracteoles scarcely compressed, 2–3 mm and as wide, apex truncate to broadly rounded, with 3 (or more) teeth across summit, surfaces smooth (or rarely tuberculate).

bracteoles sessile or subsessile, lanceolate to ovate, 4–6 mm, about as wide, each bract with a pair of thin wings 3 mm broad or less, irregularly dentate or laciniate, free tips of bracts much exceeding the wings.
2n

= 18.

= 18.

Atriplex truncata

Atriplex linearis
Phenology Flowering summer–fall. Flowering spring–fall.
Habitat Saline saltgrass-greasewood-rabbitbrush communities, and other pans or palustrine or lacustrine habitats Saline deserts, with shadscale, Canotia, Yucca, Opuntia, Rhus, and Eriogonum
Elevation 400-2700 m (1300-8900 ft) 0-800 m (0-2600 ft)
Distribution
from FNA
CA; CO; ID; MT; NV; OR; UT; WA; WY; AB; BC; SK
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; nw Mexico (Baja California, Sonora)
[WildflowerSearch map]
Discussion

Specimens of Atriplex canescens var. macilenta resemble A. linearis. The taxa have been placed together by some previous workers. Nevertheless, the stems of A. linearis are consistently more slender, the leaves proportionally narrower, and the bracts, though smaller, more closely simulate those of A. canescens. Its diploid nature signals a different evolutionary pathway than that for most of A. canescens, considered broadly. Narrow leaves occur within A. canescens, in the broad sense, sometimes with geographic correlation, sometimes not.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 4, p. 354. FNA vol. 4, p. 381.
Parent taxa Chenopodiaceae > Atriplex > subg. Obione > sect. Obione > subsect. Truncatae Chenopodiaceae > Atriplex > subg. Pterochiton
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. obovata, 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. 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. littoralis, A. matamorensis, A. mucronata, A. nudicaulis, A. nummularia, A. oblongifolia, A. obovata, 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
Synonyms Obione truncata, A. subdecumbens, A. truncata var. stricta A. canescens subsp. linearis, A. canescens var. linearis
Name authority (Torrey ex S. Watson) A. Gray: Proc. Amer. Acad. Arts 8: 398. (1873) S. Watson: Proc. Amer. Acad. Arts 24: 72. (1889)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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