Atriplex coronata |
Atriplex rosea |
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crownscale, wedgescale |
red orach, red orache, redscale, tumbling orach, tumbling orache, tumbling saltweed |
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Habit | Herbs, erect or decumbent, 0.5–6 dm; branches terete, fructiferous almost to base, scurfy when young. | Herbs, erect, coarse, 1–10(–20) dm. | ||||||||
Stems | simple or more commonly divaricately branching throughout, branches terete; herbage whitish scurfy to glabrate. |
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Leaves | alternate, subsessile or proximal short petiolate; blade ascending, oblong, oblong-ovate, or lanceolate to elliptic, 5–40 × 2–10 mm, thin, base acute to obtuse, margin entire, apex acute to acuminate. |
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. |
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Flowers | of both sexes in small axillary glomerules, 5-merous. |
in axillary glomerules or interrupted terminal spikes. |
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Staminate flowers | with 4 or 5 sepals. |
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Pistillate flowers | in axillary glomerules of 5–10. |
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Seeds | light brown to amber, 1–1.5 mm. |
dimorphic: brown, 2–2.5 mm wide, or black, 1–2 mm wide; radicle inferior. |
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Fruiting | bracteoles almost sessile, broadly cuneate, 2–5 × (2–)2.5–5 mm, united to summit, truncate at summit, sides smooth or obscurely tuberculate. |
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. |
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2n | = 36. |
= 18. |
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Atriplex coronata |
Atriplex rosea |
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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 |
CA
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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]
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Discussion | Varieties 3 (3 in the flora). Although placed within the Atriplex argentea species complex by P. C. Standley (1916), this taxon appears more nearly allied to A. cordulata, differing mainly in leaf shape, round-ovate or deltoid-ovate to elliptic or lanceolate (not ovate to cordate-ovate), and markedly tuberculate faces of the fruiting bracteoles. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
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Key |
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Source | FNA vol. 4. | FNA vol. 4, p. 340. | ||||||||
Parent taxa | Chenopodiaceae > Atriplex > subg. Obione > sect. Obione > subsect. Pusillae | Chenopodiaceae > Atriplex > subg. Atriplex > sect. Sclerocalymma | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | A. elegans var. coronata, Obione coronata | |||||||||
Name authority | S. Watson: Proc. Amer. Acad. Arts 9: 114. (1874) | Linnaeus: Sp. Pl. ed. 2, 2: 1493. (1763) | ||||||||
Web links |
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