Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Russian Pigweed - Axyris amaranthoides
Other Names:  Upright Axyris

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 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 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 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

References
Login Logout
Citation for data on this website:
Russian Pigweed — Axyris amaranthoides.  Montana Field Guide.  .  Retrieved on , from