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Montana Field Guide

Montana Field Guides

Broom Snakeweed - Gutierrezia sarothrae


Global Rank: G5
State Rank: S5

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

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General Description
Subshrub. Stems numerous, erect, 8–30 cm, unbranched below the inflorescence. Herbage puberulent, minutely punctate-glandular. Leaves cauline, linear, 1–4 cm long. Inflorescence flat-topped-corymbiform, composed of sessile heads in small clusters. Heads radiate; involucre obconic, 3–5 mm high; phyllaries 8 to 14, imbricate in 3 to 4 series, lanceolate to narrowly elliptic, glabrous, resinous with a thickened green tip; receptacle conic, naked. Ray flowers 3 to 7, yellow, female; ligules 1–3 mm long. Disk flowers perfect, yellow; corolla 2–4 mm long, funnelform; style branches with hairy, lance-linear appendages. Pappus 1 or 2 series of erose scales. Achenes clavate, 1–2 mm long, densely strigose (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
AB to MB south to CA, AZ, NM, TX and Mexico (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 211

(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
Sagebrush steppe, grasslands, juniper woodlands, badlands; plains, valleys to subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Broom Snakeweed — Gutierrezia sarothrae.  Montana Field Guide.  .  Retrieved on , from