Atriplex powellii |
Atriplex saccaria |
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Powell's orach, Powell's orache, Powell's saltbush, Powell's saltweed |
sack saltbush, sack saltweed, stalk orach, stalk orache |
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Habit | Herbs, dioecious or sometimes sparingly monoecious. | Herbs, erect, forming rounded clumps. | ||||||||||||
Stems | slender to stout, mainly 1–5(–7) dm, branching almost throughout; herbage pubescent with scurfy and arachnoid hairs. |
mainly 0.5–4(–5) dm; stems usually branched from base, terete, stout, angled; herbage scurfy. |
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Leaves | alternate, proximalmost on petioles (3–)5–30 mm, becoming subsessile or short petiolate distally; blade 3-veined, ovate to rhombic or orbiculate to elliptic, 0.4–5 × 0.2–3 cm, base rounded to cuneate, margin entire, apex acute to obtuse. |
alternate or proximalmost subopposite, short petiolate or distal ones sessile; petiole 2–5 mm; blade cordate-ovate or subreniform to ovate to deltoid-ovate or oval, mainly 6–40 × 4–30 mm, base truncate to subcordate or broadly cuneate, margin entire or in some subhastately lobed or sometimes undulate-dentate, apex acute to rounded. |
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Staminate flowers | with calyx 4–5-lobed. |
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Pistillate flowers | usually in fascicles of 1–3 in proximal axils. |
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Seeds | greenish, yellowish, or brown, 0.9–2 mm; radicle superior. |
brownish to whitish, 1.5–2.3 mm. |
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Fruiting | bracteoles sessile, ovate to oblong or broadly cuneate or pan-duriform, 1.5–5.5 × 1.5–5 mm, thick, united to apex, apex truncate to cuspidate or tridentate, surfaces with thickened processes or rarely smooth. |
bracteoles monomorphic or dimorphic, larger ones on stipes (2–)4–8(–15) mm, others sessile, united at base, round-triangular or suborbicular, 4–6 mm, irregularly and coarsely dentate and with ± densely beset with flat, cristate, or hornlike appendages, smaller bracteoles (lacking or rare in var. asterocarpa) in same axils, oblong to cuneate, 3–4 mm, apex truncate, dentate only at summit, faces smooth. |
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Staminate | glomerules in distal axils or in short, naked, terminal (early deciduous) panicles; flowers with 5-parted calyx. |
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2n | = 18. |
= 18. |
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Atriplex powellii |
Atriplex saccaria |
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Distribution |
AZ; CO; ID; MT; NE; NM; OR; SD; UT; WY; AB; SK
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AZ; CO; NM; UT; WY
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 4, p. 352. | FNA vol. 4. | ||||||||||||
Parent taxa | Chenopodiaceae > Atriplex > subg. Obione > sect. Obione > subsect. Argenteae | Chenopodiaceae > Atriplex > subg. Obione > sect. Obione > subsect. Saccariae | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | Obione powellii | A. truncata var. saccaria, Obione saccaria | ||||||||||||
Name authority | S. Watson: Proc. Amer. Acad. Arts 9: 114. (1874) | S. Watson: Proc. Amer. Acad. Arts 9: 112. (1874) | ||||||||||||
Web links |