Lactuca biennis
Plants
Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 3: 321. Courtesy of Kentucky Native Plant Society. Scanned by Omnitek Inc. · public_domain
About
Lactuca biennis is a North American species of wild lettuce known by the common names tall blue lettuce and blue wood lettuce. It is widespread across much of the United States and Canada from Alaska and Yukon south as far as California, New Mexico, and Georgia.
Summary from Wikipedia
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Growing details and traits for Lactuca biennis in the Library.
No cultivars in the Library yet — the full profile above covers the species itself.