Family |
Asteraceae
Bidens pilosa
L.
Bidens pilosa L. var. radiata Schultz-Bip.
(Nouvelle Flore du Liban et de la Syrie, vol. 3, Pl. CCXII nº 2; 1983)
Life-form & habit: Erect, much-branched annual, 50–100 cm tall.
Leaves: Pinnatifid to pinnatisect, rarely entire.
Inflorescence & flowers: Capitula radiate, on erect peduncles; involucral bracts all appressed, equal, acute at apex, scarious-margined, as long as the flowers but overtopped by the achenes. Marginal florets with broad, white, ovate ligules, often caducous. Central florets yellow.
Fruit: Achenes blackish, with 2–4 apical barbed awns.
Phenology: Flowers from October to January.
Habitat & elevation: Cultivated ground.
Lebanese distribution: Ct. Furn el-Chebbak, Hazmiyé, Pont du Pacha, aqueduct of Nahr Beyrouth.
Native range: Argentina Northeast, Argentina Northwest, Belize, Bolivia, Brazil South, Brazil Southeast, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, French Guiana, Galápagos, Guatemala, Guyana, Haiti, Honduras, Jamaica, Juan Fernández Is., Leeward Is., Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Nicaragua, Panamá, Paraguay, Peru, Puerto Rico, Suriname, Texas, Trinidad-Tobago, Uruguay, Venezuela, Venezuelan Antilles, Windward Is. (KEW)
Introduced into: Algeria, Angola, Assam, Azores, Baleares, Baltic States, Bangladesh, Belgium, Benin, Botswana, Brazil North, Brazil Northeast, Brazil West-Central, Burkina, Cambodia, Cameroon, Canary Is., Cape Provinces, Cape Verde, Caroline Is., Central African Republic, Chad, Chagos Archipelago, China North-Central, China South-Central, China Southeast, Comoros, Congo, Cook Is., Djibouti, DR Congo, East Aegean Is., East Himalaya, Egypt, Eritrea, Eswatini, Ethiopia, Fiji, France, Free State, Gabon, Germany, Gilbert Is., Great Britain, Greece, Guinea, Gulf of Guinea Is., Hainan, Hawaii, India, Italy, Ivory Coast, Japan, Jawa, Kermadec Is., Korea, KwaZulu-Natal, Laccadive Is., Laos, Lebanon, Syria, Lesotho, Libya, Line Is., Madagascar, Madeira, Malaya, Maldives, Mali, Manchuria, Marianas, Marquesas, Marshall Is., Maryland, Mauritania, Mauritius, Morocco, Mozambique, Myanmar, Namibia, Nansei-shoto, Nepal, New Caledonia, New Guinea, New Zealand North, Nicobar Is., Nigeria, Niue, Norfolk Is., North Carolina, Northern Provinces, NW. Balkan Pen., Oman, Pakistan, Palestine, Philippines, Pitcairn Is., Poland, Portugal, Primorye, Rodrigues, Réunion, Samoa, Saudi Arabia, Selvagens, Seychelles, Sicilia, Sinai, Society Is., Socotra, South China Sea, Spain, Sri Lanka, Sudan, South Sudan, Taiwan, Thailand, Tibet, Togo, Tonga, Tuamotu, Tubuai Is., Tunisia, Vanuatu, Vietnam, West Himalaya, Wisconsin, Yemen, Zambia, Zimbabwe. (KEW)