Prickly Lettuce, China Lettuce - Lactuca serriola
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Lactuca serriola - Prickly Lettuce, China Lettuce. A species introduced from Eurasia, this plant has established itself in every state except for Alaska
Found in:
AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY
Leave comments on Lactuca serriola at this link. | 
Distribution of Lactuca serriola in the United States and Canada:
Map courtesy of The Biota of North America Program.
Map color key
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| | Site: Downtown Chattanooga, TN Date: 2010-May-20 | Photographer: Gerald C. Williamson
Nikon D60
Tamron SP 90MM f/2.8 AF Macro | | Prickly Lettuce is one of the lettuces with yellow blossoms. Each blossom is usually less than 1/2 inch across. | | 
| | Site: Downtown Chattanooga, TN Date: 2010-May-20 | Photographer: Gerald C Williamson
Nikon D60 | | It is clear from this photo the reason for "prickly" in the common name. | | Click on the photo for a larger image
| | Site: Downtown Chattanooga, TN Date: 2010-May-20 | Photographer: Gerald C Williamson
Nikon D60 | | The leaves of Lactuca serriola is pinnately lobed. | | Click on the photo for a larger image
| | Site: Downtown Chattanooga, TN Date: 2010-May-20 | Photographer: Gerald C Williamson
Nikon D60 | | Prickly lettuce grows from 2 to 7 feet tall, and is usually unbranched until the upper part of the plant where the blossoms form. It's ability to establish itself where there is little soil and in other harsh conditions explains its wide distribution. Here it is growing out of a crack between a sidewalk and an old building. | | Click on the photo for a larger image
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