Lactuca canadensis
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| File:Lactuca canadensis WILD LETTUCE (3362992724).jpg | |
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L. canadensis
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| Lactuca canadensis |
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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
- ↑ 1.0 1.1 Lactuca canadensis. Germplasm Resources Information Network (GRIN).
- ↑ Lactuca canadensis. ITIS.
- ↑ Lactuca canadensis. The Jepson eFlora 2013.
- ↑ Biota of North America Program 2014 county distribution map
- ↑ Flora of North America, Lactuca canadensis
External links
- United States Department of Agriculture Plants Profile
- CalPhotos photo gallery, University of California
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