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Montana Field Guide

Montana Field Guides

Biennial Wormwood - Artemisia biennis


Global Rank: G5
State Rank: S4S5

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

External Links






 
General Description
Annual or biennial. Stems erect, simple or branched, 20–90 cm. Herbage glabrous, inodorous. Leaves basal and cauline, petiolate; blades oblanceolate, 2–15 cm long, 1 to 2 times pinnately divided into dentate, lanceolate segments. Inflorescence compound-spiciform, bracts linear or lobed. Involucre hemispheric, 2–3 mm high; phyllaries green to purple, glabrous; receptacle glabrous. Disk flowers 20 to 60, the outer female, glandular; corolla ca. 1 mm long; yellow. Achenes glabrous, up to 1 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Throughout temperate N. America; native to western states, adventive elsewhere (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 7

(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
Roadsides, fields, margins of wetlands; 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:
Biennial Wormwood — Artemisia biennis.  Montana Field Guide.  .  Retrieved on , from