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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

Agency Status
MNPS Threat Rank:
C-value: 3

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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
Across much of MT; across much of North America excluding most of Southwest and Deep South (Lesica 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: 13

(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)


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Citation for data on this website:
Halberd-leaf Orache — Atriplex patula.  Montana Field Guide.  .  Retrieved on , from