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Montana Field Guide

Montana Field Guides

Russian Pigweed - Axyris amaranthoides
Other Names:  Upright Axyris

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Non-native Species

Global Rank: GNR
State Rank: SNA
C-value: 1


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Monoecious annual herb with sparse, stellate-pubescent foliage. Stems erect, branched, 40–100 cm. Leaves petiolate, the blades lanceolate, 2–8 cm long with entire margins. Inflorescence long-leafy bracteate panicles with spike-like branches. Flowers unisexual. Male flowers minute, 3-parted, in terminal spikes. Female flowers each subtended by 3 leaf-like bracts, below male flowers or in long-pedunculate panicles; calyx 3-parted, ca. 2 mm long, whitish. Fruit a flattened utricle, winged above, 2–3 mm long, surrounded by a slightly enlarged calyx (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
One collection from Sheridan County over 60 years ago; native to Eurasia, northern U.S. and adjacent parts of southern Canada (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX; Shultz 2003 in Fl. N. Amer. Vol. 4).

Observations in Montana Natural Heritage Program Database
Number of Observations: 2

(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
  • 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?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
  • Web Search Engines for Articles on "Russian Pigweed"
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Citation for data on this website:
Russian Pigweed — Axyris amaranthoides.  Montana Field Guide.  .  Retrieved on , from