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Rattlesnake root
Purple lettuce
Prenanthes purpurea (Hasenlattich) IMG 1123.jpg
Prenanthes purpurea
Scientific classification

P. purpurea
Binomial name
Prenanthes purpurea
  • Prenanthes tenuifolia L.
  • Chondrilla purpurea (L.) Lam.
  • Prenanthes wolfiana Schur
  • Prenanthes purpurea subsp. tenuifolia (L.) Arcang.
  • Chondrilla tenuifolia (L.) Lam.
  • Prenanthes transsilvanica Schur
  • Prenanthes schlosseri Heuff.

Prenanthes is a genus of plant in the family Asteraceae, often referred to as rattlesnake root.[2][3]

Molecular analysis in 2009 revealed that the genus as traditionally envisioned is polyphyletic, meaning that it is a conglomeration of species not closely related to one another. All but one species will be moved to other genera, leaving only Prenanthes purpurea.[4] The species, sometimes called purple lettuce,[5] is widespread across much of Europe and the Middle East.[6]

formerly included[1]

see Aetheorhiza Askellia Brickellia Chondrilla Crepidiastrum Crepis Emilia Erythroseris Faberia Hololeion Hypochaeris Ixeris Kovalevskiella Lactuca Lapsanastrum Launaea Lygodesmia Nabalus Notoseris Paraprenanthes Parasenecio Picrosia Sonchella Sonchus Soroseris Stephanomeria Trixis Youngia


  1. ^ a b c Flann, C (ed) 2009+ Global Compositae Checklist Archived 2014-12-15 at
  2. ^ Linnaeus, Carl von. 1753. Species Plantarum 797-798
  3. ^ Tropicos, Prenanthes L.
  4. ^ Posch, M., et al. (2011). A new trisaccharide derivative from Prenanthes purpurea. Journal of the Serbian Chemical Society 76(6), 841-45.
  5. ^ "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-01-25. Retrieved 2014-10-17.
  6. ^ Altervista Flora Italiana, Lattuga montana purpurea, Purple Lettuce, Prenanthes purpurea L. includes photos, drawings, and distribution maps