Lactuca canadensis

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Lactuca canadensis
File:Lactuca canadensis WILD LETTUCE (3362992724).jpg

Secure (NatureServe)
Scientific classification
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L. canadensis
Binomial name
Lactuca canadensis
Synonyms
Synonymy
  • Cicerbita canadensis (L.) Wallr.
  • Cicerbita elongata (Willd.) Wallr.
  • Galathenium elongatum (Muhl. ex Willd.) Nutt.
  • Galathenium salicifolium Nutt.
  • Lactuca sagittifolia Elliott
  • Lactuca steelei Britton
  • Mulgedium canadense (L.) Farw.
  • Mulgedium integrifolium Cass.
  • Wiestia canadensis (L.) Sch.Bip.
  • Wiestia elongata (Willd.) Sch.Bip.

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Lactuca canadensis is a species of wild lettuce known by the common names Canada lettuce, Canada wild lettuce, tall lettuce,[1] and Florida blue lettuce.[2] Its true native range is not clear,[1] but it is considered to be a native of the eastern and central parts of North America. It naturalized in the western part of the continent as well as in Eurasia.[3][4]

Lactuca canadensis is a generally biennial herb in the daisy family growing from a taproot to maximum heights of 50–200 cm (20-80 inches) or more. The leaves are deeply lobed and occasionally toothed. The top of the stem bears an inflorescence with many flower heads, each up to 1 cm (0.4 inches wide when open. The heads have many pale yellow ray florets but no disc florets. The fruit is a dark-colored achene about half a centimeter (0.2 inches) long with a white pappus.[5]

References

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External links


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  1. 1.0 1.1 Lactuca canadensis. Germplasm Resources Information Network (GRIN).
  2. Lactuca canadensis. ITIS.
  3. Lactuca canadensis. The Jepson eFlora 2013.
  4. Biota of North America Program 2014 county distribution map
  5. Flora of North America, Lactuca canadensis