Lactuca canadensis

Lactuca canadensis

Secure  (NatureServe)
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Tribe: Cichorieae
Genus: Lactuca
Species: L. canadensis
Binomial name
Lactuca canadensis
L.
Synonyms[1]

Lactuca canadensis is a species of wild lettuce known by the common names Canada lettuce, Canada wild lettuce, tall lettuce,[2] and Florida blue lettuce.[3] Its true native range is not clear,[2] 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.[4][5]

Lactuca canadensis is a generally biennial herb in the daisy family growing from a taproot to maximum heights of 50–200 cm (19.5–78.5 in) 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 (0.5 in) 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.[6]

References

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

External links

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This article is issued from Wikipedia - version of the 10/11/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.