![]() ![]() "A weed of disturbed ground, gardens etc." Vouchers cited: R.D. National Tropical Botanical Garden (U.S.A. Vouchers cited: Harris 198, Yuncker 9278, Whistler 1380 Native range: Temperate and tropical America, but introduced early to the Pacific and parts of Asia. When herbicides haveĮradicated perennial grasses this weed often becomes dominant" Remain viable in the soil for at least 5 years. Permitting three or four generations a year in some regions. "Single plants produce up to 6000 seeds, many of which germinate readily, Propagation: Seeds, which attach to clothing or animal's fur or feathers. Moist uplands in the Galápagos Islands (McMullen, 1999 p. In Tonga, "a waste-area weed" (Yuncker, 1959 p. From low altitudes to over 2000 m" (Henty & Pritchard, 1975 p. In New Guinea, "a weed of cultivation, roadsides, forest clearings, plantations and overgrazed pasture. In Fiji, "naturalized along trails and roads, in cultivated areas, and on waste land from near sea level to an elevation of about 900 m" (Smith, 1991 pp. In Hawaii, "widespread in disturbed areas" (Wagner et al., 1999 pp. Grows well up to 1,300 m, to over 2,000 m in Papua New Guinea. It thrives best in full sun, where the soil is relatively dry and infertile." (Swarbrick, 1997) It forms a dense ground cover that prevents regeneration of other species. It occurs as a major weed of vegetables and other crops it is common in pastures, plantations, along roadsides and on wasteland throughout the region. Habitat/ecology: "Cobbler's pegs or beggar's ticks is a prolific ephemeral herb. Ray florets absent or 4-7 per head, rays 2-8 mm long: Bidens pilosa (Wagner et al., 1999 pp. Ray florets 5-8 per head, rays 10-16 mm long: Bidens Key to distinguish between Bidens alba and Bidens pilosa pilosa also occurs." (Waterhouse and Norris, 1987 pp. In French Polynesia, American Samoa, and many other places in the Pacific, there is a variety B. The seeds are black, about 1 cm long, with 2 or 3 barbed awns at the Each flower cluster has four or five short, broad, white 'petals' but these do not persist for very long. Individual flowers are yellow but are tiny and held in dense terminal clusters in a widely branching flowering head. Leaves are deeply divided into three toothed lobes, with the terminal lobe larger than the other two. "An erect annual or perennial herb with branching habit to about 1m high. ![]() Achenes dark brown or black, straight, wingless,Ĩ-16 mm long, setose." (Wagner et al, 1999 pp. Long disk florets 35-75 per head, perfect, corollas yellow pappus of 2-3 (-5)īarbed awns 1-2 mm long. Mm long ray florets absent or 4-7 per head, rays white or yellowish, 2-8 mm Main stem and lateral branches, discoid and 0.7-1 cm in diameter including rayįlorets, peduncles 1-9 cm long outer involucral bracts spatulate-tipped, 2.5-5 Heads 21-42 in compound cymes terminating Leaves pinnately compound, usually 2.5-13.5 cm long including Spanish: acetillo, amor seco, arponcito, asta de cabra, bidente piloso, cacho de cabra, cadillo, hierba amarilla, masquia, mazote, papunga chipaca, pega-pega, perca, rosilla, sirvulacaĭescription: "Erect annual herbs 0.3-1.8 m Maori (Cook Islands): kamika tuarongo, nīroa, piripiri, piripiri kerekere, piripiri nīroa (Florida)))Įnglish: Spanish needle, beggar's tick, beggar-ticks, black-jack, broom stick, broom stuff, cobbler's pegs, devil's needles, hairy beggar-ticks, hairy bidensįijian: batimadramadra, matakaro, matua kamate, mbatikalawau, mbatimandramandraįrench: bident hérissé, bident poilu, herbe d'aiguille, herbe villebague, piquants noirs ![]() Reject, score: 19 (Go to the risk assessment ( U.S. High risk, score: 23 (Go to the risk assessment ( Pacific)) Primarily a threat at high elevations? no Learn more about how we research deals.Bidens pilosa: info from PIER (PIER species info)Ĭlick on an image for links to BIGGER PICTURES Say hi (or send a picture of your pet) to Sarah at or reach her on Twitter at or on Instagram at Learn more about how our team of experts tests and reviews products at Insider here. Her accomplishments from this position, in addition to the countless deals she's written, include implementing multiple social media marketing campaigns and launching a Deals Facebook group for the company. After graduating from California State University, Fullerton with a degree in Marketing, Sarah started out as a Freelance Deals Writer at Wirecutter there she focused on newsletter creation, social media promotion, and syndication in addition to deals writing before stepping into a full-time role. Prior to joining Insider Inc., she was a Deals Writer at Wirecutter, a New York Times company. ![]() As a Tech Deals and Streaming Reporter for Insider's Reviews team, Sarah covers the latest movie and series releases along with the best sales on products we recommend. ![]()
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