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Montana Field Guide

Montana Field Guides

Prickly Lettuce - Lactuca serriola

Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 0

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General Description
Annual or biennial. Stems erect, 20–100 cm, simple and bristly below. Leaves clasping, oblong to oblanceolate, 5–20 cm long, prickly below and on the margins, dentate and sometimes with remote, deltoid lobes. Involucre 5–15 mm high; inner phyllaries purple-tipped, reflexed in fruit. Rays 12 to 20, yellow, drying blue; ligules 4–6 mm long. Achenes 2–4 mm long; beaks 2–4 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Unknown/Undetermined
 


Range Comments
Introduced throughout temperate N. America; native to Europe (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 59

(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
Disturbed soil of grasslands, fields, roadsides; 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:
Prickly Lettuce — Lactuca serriola.  Montana Field Guide.  .  Retrieved on , from