Flora of North America species comparison

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Atriplex rosea

red orach, red orache, redscale, tumbling orach, tumbling orache, tumbling saltweed
Habit Herbs, erect, coarse, 1–10(–20) dm.
Stems

simple or more commonly divaricately branching throughout, branches terete;

herbage whitish scurfy to glabrate.
Leaves

alternate, short petiolate, blade prominently 3-veined, ovate to lanceolate, mainly 12–80 × 6–50 mm, margin irregularly sinuate-dentate and often subhastately lobed or rarely some entire, apex acute to obtuse.
Flowers

in axillary glomerules or interrupted terminal spikes.
Staminate flowers

with 4 or 5 sepals.
Pistillate flowers

in axillary glomerules of 5–10.
Seeds

dimorphic: brown, 2–2.5 mm wide, or black, 1–2 mm wide;

radicle inferior.
Fruiting

bracteoles prominently 3–5-veined, sessile or short stipitate, (3–)4–6(–10) mm and as wide, sometimes subhastately lobed at base, conspicuously dentate, sharply tuberculate to almost smooth on faces.
2n

= 18.

Atriplex rosea
Phenology Flowering mid summer–fall.
Habitat Disturbed sites, often in riparian habitats or in barnyards or on animal bed grounds, along roadsides and irrigation canals, with juniper, sagebrush, rabbitbrush, pinyon-juniper, Salsola, Chrysothamnus, Atriplex spp., and other weedy species
Elevation 0-2600 m (0-8500 ft)
Distribution
from FNA
AZ; CA; CO; FL; ID; MA; MI; MO; MT; ND; NE; NJ; NM; NV; NY; OH; OR; PA; UT; WA; WI; WY; AB; BC; NS; ON; SK; Eurasia [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
Discussion

At least some early collections were from ballast dumps at harbors on both coasts. It seems probable that the plants were quickly spread inland from initial centers of introduction by birds and more recently along railroads.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 4, p. 340.
Parent taxa Chenopodiaceae > Atriplex > subg. Atriplex > sect. Sclerocalymma
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. 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
Name authority Linnaeus: Sp. Pl. ed. 2, 2: 1493. (1763)
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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