Chondrilla L.
Chondrilla is a Eurasian genus of ca. 25-30 species (Mabberley 2008). It is by far most divers in the former USSR where 22 species occur (Leonova 2000). One species, Chondrilla juncea, is a widespread, locally troublesome weed. In wheat-growing regions in Australia it is the most serious weed (Panetta & Dodd 1987). It also infests millions of acres in parts of North America (Reed 1979, Gottlieb 2006). Its deep and extensive root system prevents an easy eradication.
Literature:
Gottlieb L.D. (2006) Chondrilla. In: Flora of North America Editorial Committee (eds.), Flora of North America, vol. 19. Oxford University Press, New York-Oxford: 252-253.
Leonova T.G. (2000) Chondrilla. In: Bobrov E.G. & Tzvelev N.N. (eds.), Flora of the USSR, vol. 29. Koeltz Scientific Books: 550-577.
Mabberley D.J. (2008) Mabberley’s plant-book (3th ed.). Cambridge University Press, Cambridge: XVIII + 1021 p.
Panetta F.D. & Dodd J. (1987) The biology of Australian weeds. 16. Chondrilla juncea L. J. Austr. Inst. Agric. Sc. 53: 83-95.