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Your search found 7 taxa.
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Lactuca serriola var. integrata
Heads are ligulate (having only ray flowers), small, and yellow-flowered, per Wildflowers of the Southern Mountains.
Many pale to deep yellow flowers in each head, but involucres < 1/2" high, per Wildflowers of the Southern Mountains.
Flowers typically blue, but yellow in one form. Panicle branches short, per Wildflowers of the Southern Mountains.
PLANTS National Database
Lactuca floridana var. villosa
Fewer ray flowers than L. biennis (11-17 per head), per Wildflowers of the Southern Mountains.
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