''Prenanthes'' is a genus of plant in the family Asteraceae, 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 and the Middle East.Altervista Flora Italiana, Lattuga montana purpurea, Purple Lettuce, ''Prenanthes purpurea'' L. includes photos, drawings, and distribution maps
The genus formerly included; '' Aetheorhiza,
Askellia
''Askellia'' is a genus of Asian and North American plants in the tribe Cichorieae within the family Asteraceae.
; SpeciesBrickellia, 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 ...
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 ...
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 ...
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 m ...
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
''Picrosia'' is a genus of South American plants in the tribe Cichorieae within the family Asteraceae.
; Species
* '' Picrosia cabreriana'' A.G.Schulz - Brazil ( Paraná, Rio Grande do Sul, Santa Catarina), Paraguay (Amambay), Argentina ( Cha ...
,
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 ...
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 ...