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Montana Field Guide

Montana Field Guides

Garden Orache - Atriplex hortensis
Other Names:  Red Orach, Mountain Spinach, French Spinach

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

External Links






 
General Description
Monoecious annuals with green to red, glabrous foliage. Stems erect, 50–150 cm. Leaf blades opposite below, the blades lanceolate to broadly ovate, 5–20 cm long with mostly entire margins. Inflorescence of spikes in terminal and axillary panicles. Male flowers with a 5-parted calyx and 5 stamens. Female flowers dimorphic, some bracteate without a calyx, others ebracteate with a 5-parted calyx. Fruit either a horizontal seed surrounded by the calyx or a vertical seed surrounded by swollen, wing-like orbicular pistillate bracts 5–10 mm wide (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
In MT in about half of the western counties and a few in the northeast and Hi Line; native to Eurasia, introduced to much of northern U.S. and southern Canada (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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

Recency

 

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



Habitat

Management

References
  • Additional ReferencesLegend:   View Online Publication
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    • Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Garden Orache — Atriplex hortensis.  Montana Field Guide.  .  Retrieved on , from