Lactuca graminifolia, the grassleaf lettuce[2] is a North American species of wild lettuce. It grows in Mexico, Central America, Hispaniola, and the southern United States from Arizona to Florida, Virginia and the Carolinas.[3][4][5][6][7]

Description

Lactuca graminifolia is a biennial herb in the dandelion tribe within the daisy family growing from a taproot a height of up to 150 cm (5 feet). The top of the stem bears a multibranched inflorescence with many flower heads. Each head contains 15-20 blue or purple ray florets but no disc florets. The fruit is a brown achene.[8]

References

  1. ^ The Plant List, Lactuca graminifolia Michx.
  2. ^ USDA, NRCS (n.d.). "Lactuca graminifolia". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2 August 2015.
  3. ^ Biota of North America Program 2014 county distribution map
  4. ^ SEINet, Southwestern Biodiversity, Arizona chapter, Lactuca graminifolia Michx.
  5. ^ Tropicos, specimen listing for Lactuca graminifolia Michx.
  6. ^ Nash, D. L. 1976. Tribe XI, Cichorieae. En Nash, D.L. & Williams, L.O. (eds), Flora of Guatemala - Part XII. Fieldiana, Botany. 24(12): 440–454, 598–603
  7. ^ Breedlove, D.E. 1986. Flora de Chiapas. Listados Florísticos de México 4: i–v, 1–246
  8. ^ Flora of North America, Lactuca graminifolia Michaux, 1803.

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