Common Name: biennial lettuce, tall blue lettuce
Scientific Name: Lactuca biennis (Moench) Fern.
Family Name: Asteraceae (Compositae) - Aster or Sunflower Family

Identification Notes:

life cycle - biennial, reproducing by seed

stems - upright, very tall, very leafy, smooth, branched above during flowering growth habit 1, growth habit 2

leaves - alternate, large, elongated, deeply cut pinnate lobes, lobes roughly triangular, margins toothed, smooth, petioled below, somewhat clasping above leaves 1, leaves 2

flowers - heads of light blue, cream or sometimes yellow ray (ligulate) florets, heads urn-shaped; compact clusters, large, terminal flower heads 1, flower heads 2, flower heads 3

other - contains milky sap

Images:

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