''Prenanthes'' is a genus of plant in the family

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

, often referred to as rattlesnake root. 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''. The species, sometimes called purple lettuce, is widespread across much of

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

and the

Middle East The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabian Peninsula, Arabia (including the Arabian Peninsula and Bahrain), Anatolia, Asia Minor (Asian part of Turkey except Hatay Pro ...

.Altervista Flora Italiana, Lattuga montana purpurea, Purple Lettuce, ''Prenanthes purpurea'' L.
includes photos, drawings, and distribution maps The genus formerly included; '' Aetheorhiza, Askellia,

Brickellia ''Brickellia'' is a North American genus of about 100 to 110 species of plants in the family Asteraceae, known commonly as brickellbushes. They are found in Canada, the United States, Mexico, and Central America. Many species are native to the A ...

, Chondrilla,

Crepidiastrum ''Crepidiastrum'' is an Asian genus of flowering plants in the family Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Co ...

, Crepis,

Emilia Emilia may refer to: People * Emilia (given name), list of people with this name Places * Emilia (region), a historical region of Italy. Reggio, Emilia * Emilia-Romagna, an administrative region in Italy, including the historical regions of Emi ...

Erythroseris ''Erythroseris'' is a genus of African plants in the tribe Cichorieae within the family Asteraceae. ; Species * '' Erythroseris amabilis'' (Balf.f.) N.Kilian & Gemeinholzer - Socotra (part of Yemen) * '' Erythroseris somalensis'' (R.E.Fr.) N.Ki ...

Faberia ''Faberia'' is a genus of Chinese flowering plants in the family Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonl ...

Hololeion ''Hololeion'' is a genus of East Asian flowering plants in the family Asteraceae. It is native to Japan, Korea, China, and the Russian Far East. ; Species * '' Hololeion fauriei'' (H.Lév. & Vaniot) Kitam. - South Korea * '' Hololeion krameri'' ...

Hypochaeris ''Hypochaeris'' is a genus of plants in the family Asteraceae. Many species are known as cat's ear. These are annual and perennial herbs generally bearing flower heads with yellow ray florets. These plants may resemble or be confused with dande ...

Ixeris ''Ixeris'' is a genus of Asian flowering plants in the family Asteraceae. Concepts of which species should be included in the genus have changed in recent years because of the use of molecular investigations. Numerous species formerly regarded a ...

, Kovalevskiella, Lactuca, Lapsanastrum, Launaea, Lygodesmia,

Nabalus ''Nabalus'' is a genus of Asian and North American flowering plants in the tribe Cichorieae within the family Asteraceae. ''Nabalus'' is now considered the correct name for a group of plants in North America that were formerly considered to be ...

, Notoseris,

Paraprenanthes ''Paraprenanthes'' is a genus of East Asian plants in the tribe Cichorieae within the family Asteraceae, most of the species found only in China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the ...

Parasenecio ''Parasenecio'' is a genus of flowering plants in the groundsel tribe within the sunflower family. Most of the species are Asian, but one ''(P. auriculatus)'' occurs in the Aleutian Islands in Alaska Alaska ( ; russian: Аляска, A ...

, Picrosia,

Sonchella ''Sonchella'' is a genus of Asian flowering plants in the family Asteraceae. ; Species * '' Sonchella dentata'' (Ledeb.) Sennikov - Russia ( Altai, Tuva), China (Qinghai), Mongolia * '' Sonchella stenoma'' (Turcz. ex DC.) Sennikov - Russia (Burya ...

Sonchus ''Sonchus'' is a genus of flowering plants in the tribe Cichorieae within the family Asteraceae and are commonly known as sow thistles (less commonly hare thistles or hare lettuces). Sowthistles are annual, biennial or perennial herbs, with or w ...

Soroseris ''Soroseris'' is a genus of Asian plants in the tribe Cichorieae within the family Asteraceae. ; Species * ''Soroseris depressa'' (Hook. f. & Thomson) J.W. Zhang, N. Kilian & H. Sun - Tibet, Bhutan, Sikkim, Nepal * ''Soroseris erysimoides'' (Ha ...

Stephanomeria ''Stephanomeria'' is a genus of North American plants also known as wirelettuce, belonging to the tribe Cichorieae within the family Asteraceae.Lee, J., Baldwin, B., and Gottlieb, L.D.; ''Phylogeny of ''Stephanomeria'' and related genera (composi ...

Trixis ''Trixis'' is a genus of shrubs in the family Asteraceae, native to North and South America including the West Indies. Members of the genus are commonly known as threefolds due to the outer lip of the corolla. The generic name is derived from ...

, and

Youngia ''Youngia'' is a genus of Asian plants in the tribe Cichorieae within the family Asteraceae. There are several weedy species in the genus as well as the endangered ''Youngia nilgiriensis'' from Sispara in southern India, and '' Youngia japonica' ...

References

Cichorieae Monotypic Asteraceae genera {{Cichorieae-stub