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Montana Field Guide

Montana Field Guides

Gardner's Saltbush - Atriplex gardneri

Native Species

Global Rank: G5
State Rank: S5

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

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General Description
PLANTS: Low, mostly dioecious subshrubs to 50 cm high. Stems prostrate to usually decumbent with gray-scurfy foliage. Source: Lesica et al. 2012

LEAVES: Short-petiolate; the blades linear to spatulate, 5–40 mm long with entire margins, the lowest sometimes opposite. Source: Lesica et al. 2012

INFLORESCENCE: Glomerules in terminal spikes or dense panicles. Male flowers yellow or brown, 5-parted. Female flowers lacking a calyx; pistillate bracts united above the middle. Mature pistillate bracts lanceolate to orbicular, 2–5 mm long with toothed or winged margins and facial tubercles. Source: Lesica et al. 2012

Montana's plants are of 3 varieties: gardneri, aptera, falcata

Diagnostic Characteristics
In Montana, three varieties of Atriplex gardneri have been reported (Welsh in FNA 2003); however, their morphological characteristics do not often differ ecologically and many herbarium specimens cannot be assigned with confidence to a variety (Lesica et al. 2012). The MTNHP is not tracking these varieties, but will retain within the botany database the varietal name if provided by the observer.

* var. gardneri: globose to flattened pistillate scales with lateral teeth and facial tubercles.
* var. aptera: ellipsoid pistillate scales with 4-lobed lateral wings. It is considered to be a hybrid between Atriplex gardneri and Atriplex canescens (Welsh in FNA 2003). Variety aptera is frequently found, long-lived, and fertile.
* var. falcata: lanceolate pistillate scales without lateral teeth and may have or may not have low facial tubercles.

Species Range
Montana Range

Year-round
 


Range Comments
Occuring throughout most of MT; AB to MB south through e WA to CA, AZ, NM and east to the Dakotas and NE (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: 416

(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
Fine-textured, saline soils of stream terraces, badlands, steppe, grasslands; plains, valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Gardner's Saltbush — Atriplex gardneri.  Montana Field Guide.  .  Retrieved on , from