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Montana Field Guide

Montana Field Guides

Wall-lettuce - Mycelis muralis
Other Names:  Lactuca muralis

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 1

External Links

General Description
Glabrous and glaucous annual. Stems 30-90 cm. Leaf blades oblanceolate, 6-18 cm long, deeply pinnately lobed; lobes deltoid, shallowly lobed. Involucre 7-11 mm high; phyllaries reflexed in fruit. Rays 5, yellow; ligules ca. 7 mm long. Achenes ca. 3 mm long; the beak 0.5-1 mm long; pappus white (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Lesica (2012) treats this species in the genus Lactuca.

Species Range

Range Comments
One collection from Sanders County. Introduced to northeast and northwest North America; native to Europe (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 6

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Relative Density



(Observations spanning multiple months or years are excluded from time charts)



  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., B. Christiaens, D. Hanna, L. Larsen, and C. Odegard. 2013. Noteworthy collection. MadroƱo 60(3): 262-263.
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Citation for data on this website:
Wall-lettuce — Mycelis muralis.  Montana Field Guide.  .  Retrieved on , from