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Montana Field Guide

Montana Field Guides

Silvery Saltbush - Atriplex argentea


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 3

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General Description
Monoecious annuals with farinose foliage. Stems erect, branched, 5–50 cm. Leaves often opposite below; the blades lanceolate to triangular, sometimes hastate, 1–4 cm long; margins entire Inflorescence axillary glomerules and short terminal spikes, female below male. Male flowers 4 to 5-parted. Female flowers lacking a calyx; pistillate bracts united to the middle. Mature pistillate bracts hardened in the center, 3–6 mm long with lobed margins and often tuberculate faces. Our plants are variety argentea (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Amaranthus alba may be confused with A. blitoides, but they are easily distinguished by the size and luster of the seeds (Welsh 2003 in Fl. N. Amer. Vol. 4)

Species Range
Present
 


Range Comments
In MT scattered irregularly across about a third of our counties, but excluding most along the western tier apart from Beaverhead Co.; BC to MB south to CA, TX, and Mexico, also widely introduced across S. Am., Eurasia, Africa and Australia (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX; Welsh 2003 in Fl. N. Amer. Vol. 4).

Summary of Observations Submitted for Montana
Number of Observations: 34

(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
Barren, fine-textured to sandy, often saline or alkaline soil of steppe, eroding slopes, badlands; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Silvery Saltbush — Atriplex argentea.  Montana Field Guide.  .  Retrieved on , from