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Tall Blue Lettuce - Lactuca biennis
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Native Species Global Rank :
G5
State Rank :
SNR
C-value :
3
Agency Status USFWS :
USFS :
BLM :
External Links
General Description
Annual or biennial. Stems 60–200 cm. Leaf blades ovate, 10–40 cm long, deeply pinnately lobed; lobes deltoid, dentate, sparsely villous on the margins. Involucre 7–12 mm high; inner phyllaries reflexed in fruit. Rays 15 to 30, blue; ligules 1–5 mm long. Achenes 4–5 mm long; beaks up to 0.5 mm long, stout; pappus tawny (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).
Range Comments
AK to NL south to CA, NM, IL and NC (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).
Observations in Montana Natural Heritage Program Database
Number of Observations: 15
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Map Help and Descriptions
Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Ecology
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus vagans ,
Bombus fervidus ,
Bombus rufocinctus ,
Bombus terricola ,
Bombus griseocollis , and
Bombus impatiens (Colla and Dumesh 2010).
Stewardship Responsibility
References
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