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Montana Field Guide

Montana Field Guides

Halberd-leaf Orache - Atriplex patula
Other Names:  Atriplex hastata

Native Species

Global Rank: G5
State Rank: SU
C-value: 3

Agency Status


External Links

General Description
Monoecious or dioecious annual, farinose to glabrous. Stems erect to ascending, 20–100 cm. Leaf blades glabrate, up to 10 cm long, narrowly lanceolate to ovate-hastate with entire to deeply dentate margins. Inflorescence axillary and terminal, interrupted spikes of glomerules. Male flowers mostly 5-parted. Female flowers with a calyx, the pistillate bracts nearly separate. Mature pistillate bracts swollen, deltoid, 3–6 mm long with entire to dentate margins and rarely tuberculate faces (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range Range Descriptions


Range Comments
Across much of MT; across much of North America excluding most of Southwest and Deep South (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX; Welsh 2003 in Fl. N. Amer. Vol. 4).

Observations in Montana Natural Heritage Program Database
Number of Observations: 35

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)


  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Butler, M.A. 1996. The validity of using artificial nests to assess nest-predation rates in prairie nesting ducks. M.Sc. Thesis. Bozeman, MT: Montana State University. 82 p.
    • Eggers, M.J.S. 2005. Riparian vegetation of the Montana Yellowstone and cattle grazing impacts thereon. M.Sc. Thesis. Montana State University, Bozeman, MT. 125 p.
    • Harvey, S.J. 1990. Responses of steppe plants to gradients of water soil texture and disturbance in Montana, U.S.A. Ph.D. Thesis. Bozeman, MT: Montana State University. 34 p.
    • Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
    • Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
  • Web Search Engines for Articles on "Halberd-leaf Orache"
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Citation for data on this website:
Halberd-leaf Orache — Atriplex patula.  Montana Field Guide.  .  Retrieved on , from