Emilia Cass.
Emilia is a genus of ca. 90 species (possibly much less), originally native to the Old World tropics. Some weedy species have spread far beyond their native distribution range and have become pantropical weeds.
Emilia is closely related to Senecio but most species, including E. fosbergii, rather look like a pink-flowered Sonchus. The latter has been recorded as an alien in Belgium.
Literature:
Barkley T.M. (2006) Emilia. In: Flora of North America Editorial Committee (eds.), Flora of North America North of Mexico, vol. 20. New York & Oxford: 605-607. [available online at: http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=111550]
Chen Y., Nordenstam B. & Jeffrey C. (2011) Emilia. In: Wu Z.Y., Raven P.H. & Hong D.Y. (eds.), Flora of China Volume 20–21 (Asteraceae): 542-544. Science Press (Beijing)
& Missouri Botanical Garden Press (St. Louis): [available online at: http://www.eflora.cn/foc/pdf/Asteraceae.pdf]
Cron G.V. (2014) A synopsis of Emilia (Senecioneae, Asteraceae) in southern Africa. Phytotaxa 159(3): 195-210.
Fosberg F.R. (1972) Emilia (Compositae) in Ceylon. Ceylon Journal of Science 10: 1-9. [available online at: http://dl.nsf.ac.lk/bitstream/handle/1/7819/CJS(B.S)-10(1)-61.pdf?sequence=2&isAllowed=y]
Garabedian S. (1924) A revision of Emilia. Bulletin of Miscellaneous Information, Kew 1924: 137-144.
Jeffrey C. (1986) The Senecioneae in East tropical Africa. Kew Bulletin 41: 873-943.
Jeffrey C. (1997) What is Emilia coccinea (Sims) G.Don (Compositae)? A revision of the large-headed Emilia species of Africa. Kew Bulletin 52: 205-212.
Isawumi M.A. (1992) Studies of Emilia (Compositae : Senecioneae) in West Africa. Compositae Newsl. 22: 24-30.
Lisowski S. (1991) Le genre Emilia (Asteraceae, Senecioneae) en Afrique Centrale (Congo, Zaire, Rwanda, Burundi). Polish Botanical Studies 1: 67-116.
Lisowski S. (1997) Le genre Emilia (Cass.) Cass. (Asteraceae) dans la Flore de Guineé (Afrique occidentale). Bulletin du Jardin Botanique National de Belgique 66: 201-206.
Nicolson D.H. (1980) A summary of cytological information on Emilia and the taxonomy of four Pacific taxa of Emilia (Asteraceae: Senecioneae). Syst. Bot. 5: 391-407.
Tadesse M. & Beentje H. (2004) A synopsis and new species of Emilia (Compositae-Senecioneae) in Northeast tropical Africa. Kew Bulletin 59: 469-482.
Thompson I.R. (2006) A taxonomic treatment of tribe Senecioneae (Asteraceae) in
Australia. Muelleria 24: 51–110. [available online at: http://www.rbg.vic.gov.au/documents/Muelleria_24_p51-110_Thompson_taxonomic_Senecioneae.pdf]