Prenanthes

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

Rattlesnake root Purple lettuce
Prenanthes purpurea
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Tribe:	Cichorieae[1]
Genus:	Prenanthes L.
Species:	P. purpurea
Binomial name
Prenanthes purpurea L.
Synonyms[1]
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.

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

References

1. Flann, C (ed) 2009+ Global Compositae Checklist Archived 2014-12-15 at Archive.today
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