Pacific Island Ecosystems at Risk (PIER)

  [   PIER species lists  ]   [   PIER home  ]

Bidens pilosa
L., Asteraceae
Click on an image for links to BIGGER PICTURES


Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results: 

High risk, score: 23 (Go to the risk assessment (Pacific))
Reject, score: 19 (Go to the risk assessment (U.S. (Florida)))

Common name(s): [more details]

Bontoc: nguad, puriket

Chinese: gui zhen cao

English: beggar's tick, beggar-ticks, black-jack, broom stick, broom stuff, cobbler's pegs, devil's needles, hairy beggar-ticks, hairy bidens, Spanish needle

Fijian: batimadramadra, matakaro, matua kamate, mbatikalawau, mbatimandramandra

Filipino: pisau-pisau

French: bident hérissé, bident poilu, herbe d'aiguille, herbe villebague, piquants noirs

Hawaiian: kī, kī nehe, kī pipili, nehe

Ibatan: dadayem

Japanese: ko-sendangusa

Mangarevan: tarou, taru

Maori (Cook Islands): kamika tuarongo, nīroa, piripiri, piripiri kerekere, piripiri nīroa

Niuean: kofetoga, kofetonga

Pukapukan: pilipili

Spanish: acetillo, amor seco, arponcito, asta de cabra, bidente piloso, cacho de cabra, cadillo, hierba amarilla, masquia, mazote, papunga chipaca, pega-pega, perca, rosilla, sirvulaca

Tahitian: piripiri

Tongan: fisi‘uli

Wallisian: tae puaka

Habit:  herb

Description:  "Erect annual herbs 0.3-1.8 m tall.  Leaves pinnately compound, usually 2.5-13.5 cm long including petiole, leaflets (1-) 3-5 (-7).  Heads 21-42 in compound cymes terminating main stem and lateral branches, discoid and 0.7-1 cm in diameter including ray florets, peduncles 1-9 cm long; outer involucral bracts spatulate-tipped, 2.5-5 mm long; ray florets absent or 4-7 per head, rays white or yellowish, 2-8 mm long; disk florets 35-75 per head, perfect, corollas yellow; pappus of 2-3 (-5) barbed awns 1-2 mm long.  Achenes dark brown or black, straight, wingless, 8-16 mm long, setose."  (Wagner et al, 1999; pp. 279-281).

"An erect annual or perennial herb with branching habit to about 1m high. Leaves are deeply divided into three toothed lobes, with the terminal lobe larger than the other two. Individual flowers are yellow but are tiny and held in dense terminal clusters in a widely branching flowering head. Each flower cluster has four or five short, broad, white 'petals' but these do not persist for very long. The seeds are black, about 1 cm long, with 2 or 3 barbed awns at the tip.  In French Polynesia, American Samoa, and many other places in the Pacific, there is a variety B. pilosa minor, which has white flowers.  In French Polynesia the variety B. pilosa pilosa also occurs." (Waterhouse and Norris, 1987; pp. 274-276)

Key to distinguish between Bidens alba and Bidens pilosa:

Ray florets 5-8 per head, rays 10-16 mm long:  Bidens alba
Ray florets absent or 4-7 per head, rays 2-8 mm long:  Bidens pilosa  (Wagner et al., 1999; pp. 279-281).

Habitat/ecology:  "Cobbler's pegs or beggar's ticks is a prolific ephemeral herb...  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.  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.

Grows well up to 1,300 m, to over 2,000 m in Papua New Guinea.  In Hawai‘i, "widespread in disturbed areas"  (Wagner et al., 1999; pp. 279-281).  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. 281-282). In New Guinea, "a weed of cultivation, roadsides, forest clearings, plantations and overgrazed pasture. From low altitudes to over 2000 m" (Henty & Pritchard, 1975; p. 64). In Tonga, "a waste-area weed" (Yuncker, 1959; p. 269). Moist uplands in the Galápagos Islands (McMullen, 1999; p. 259).

Propagation:  Seeds, which attach to clothing or animal's fur or feathers. Also dispersed by water.  "Single plants produce up to 6000 seeds, many of which germinate readily, permitting three or four generations a year in some regions.  Sone seeds remain viable in the soil for at least 5 years.  When herbicides have eradicated perennial grasses this weed often becomes dominant"  (Waterhouse, 1994; p. 28).

Native range:  Temperate and tropical America, but introduced early to the Pacific and parts of Asia.

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
American Samoa
Manu‘a Islands
Ofu Island   Whistler, W. A. (1990)
Voucher cited: Garber 1021
American Samoa
Manu‘a Islands
Ofu Island introduced
Ragone, Diane/Lorence, David H. (2003) (p. 48)
American Samoa
Manu‘a Islands
Ta‘u Island   Whistler, W. A. (1990)
Vouchers cited: Harris 198, Yuncker 9278, Whistler 1380
American Samoa
Manu‘a Islands
Ta‘u Island Yuncker, T. G. (1945) (p. 67)
Vouchers cited: Yuncker 9278 (BISH), W. Harris 198 (BISH)
American Samoa
Manu‘a Islands
Ta‘u Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1990) (voucher ID: PTBG 9136)
Taxon name on voucher: Bidens pilosa
American Samoa
Tutuila Islands
Tutuila Island introduced
invasive
Space, James C./Flynn, Tim (2000) (p. 32)
Australia (Pacific offshore islands)
Lord Howe Island
Lord Howe Island introduced
Pickard, J. (1984) (p. 205)
Australia (Pacific offshore islands)
Lord Howe Island
Lord Howe Island introduced
Orchard, Anthony E., ed. (1994) (p. 18)
"A weed of disturbed ground, gardens etc." Vouchers cited: R.D. Hoogland 8643 (NSW), P.S. Green 1915 (K), L.A.S. Johnson & A.N. Rodd 1271 (K, NSW), J. Pickard 1477 (NSW), J. Pickard 2801 (NSW)
f
Australia (Pacific offshore islands)
Norfolk Islands
Norfolk Island introduced
invasive
Orchard, Anthony E., ed. (1994) (p. 7)
"A weed of disturbed ground, gardens etc." Voucher cited: I. Robinson (NSW)
Chile (offshore islands)
Rapa Nui (Easter) Island
Rapa Nui (Easter) Island (Isla de Pasqua) introduced
invasive
Meyer, Jean-Yves (2008) (p. 28)
Chile (offshore islands)
Rapa Nui (Easter) Island
Rapa Nui (Easter) Island (Isla de Pasqua) introduced
Skottsberg, Carl (1953) (p. 81)
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 551)
Chile (offshore islands)
Juan Fernández Islands
Isla Más Afuera (Alejandro Selkirk Island) introduced
invasive
Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands)
Juan Fernández Islands
Isla Más Afuera (Alejandro Selkirk Island) introduced
invasive
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 551)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Rota Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 283)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Rota Island introduced
invasive
Space, James C./Waterhouse, Barbara/Denslow, Julie S./Nelson, Duane (2000) (p. 5)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Saipan Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 283)
Cook Islands
Northern Cook Islands
Manihiki Atoll   McCormack, Gerald (2013)
Cook Islands
Northern Cook Islands
Manuae Atoll (Northern Cook Islands)   McCormack, Gerald (2013)
Cook Islands
Northern Cook Islands
Penrhyn (Tongareva) Island   McCormack, Gerald (2013)
Cook Islands
Northern Cook Islands
Pukapuka Atoll   McCormack, Gerald (2013)
Cook Islands
Northern Cook Islands
Rakahanga Atoll   McCormack, Gerald (2013)
Cook Islands
Southern Cook Islands
Aitutaki Atoll introduced
invasive
Space, James C./Flynn, Tim (2002) (p. Field notes.)
Cook Islands
Southern Cook Islands
‘Atiu Island introduced
invasive
Space, James C./Flynn, Tim (2002) (p. Field notes.)
Cook Islands
Southern Cook Islands
Mangaia Island introduced
invasive
Space, James C./Flynn, Tim (2002) (p. Field notes.)
Cook Islands
Southern Cook Islands
Ma‘uke Island introduced
invasive
Space, James C./Flynn, Tim (2002) (p. Field notes.)
Cook Islands
Southern Cook Islands
Miti‘aro Island introduced
invasive
Space, James C./Flynn, Tim (2002) (p. Field notes.)
Cook Islands
Southern Cook Islands
Palmerston (Avarau) Island   McCormack, Gerald (2013)
Cook Islands
Southern Cook Islands
Rarotonga Island introduced
invasive
Space, James C./Flynn, Tim (2002) (p. Field notes.)
Cook Islands
Southern Cook Islands
Takutea Island   McCormack, Gerald (2013)
Ecuador (Galápagos Islands)
Fernandina Group
Fernandina Island possibly introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Floreana Group
Floreana Island possibly introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Isabela Group
Isabela Island possibly introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Isabela Group
Volcán Alcedo, Isabela Island possibly introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Isabela Group
Volcán Cerro Azul, Isabela Island possibly introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Isabela Group
Volcán Ecuador, Isabela Island native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Ecuador (Galápagos Islands)
Isabela Group
Volcán Sierra Negra, Isabela Island possibly introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
San Cristóbal Group
San Cristóbal Island possibly introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Santa Cruz Group
Santa Cruz Island possibly introduced
invasive
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Santiago Group
Santiago Island possibly introduced
invasive
Charles Darwin Foundation (2008)
Federated States of Micronesia
Chuuk Islands
Fefan Island introduced
invasive
Space, James C./Waterhouse, Barbara/Denslow, Julie S./Nelson, Duane/Mazawa, Thomas R. (2000) (p. 6)
Federated States of Micronesia
Chuuk Islands
Weno (Moen) Island introduced
invasive
Space, James C./Waterhouse, Barbara/Denslow, Julie S./Nelson, Duane/Mazawa, Thomas R. (2000) (p. 6)
Federated States of Micronesia
Yap Islands
Ulithi Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 283)
Federated States of Micronesia
Yap Islands
Woleai Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 283)
Federated States of Micronesia
Yap Islands
Yap (Waqab) Island introduced
invasive
Space, James C./Falanruw, Marjorie (1999) (p. Field notes)
Fiji
Fiji Islands
Lakemba Island introduced
invasive
Smith, Albert C. (1991) (pp. 281-282)
Voucher cited: Garnock-Jones 884
Fiji
Fiji Islands
Moala Island introduced
invasive
Smith, Albert C. (1991) (pp. 281-282)
Voucher cited: Bryan 316b
Fiji
Fiji Islands
Ngau Island introduced
invasive
Smith, Albert C. (1991) (pp. 281-282)
Voucher cited: Smith 7982
Fiji
Fiji Islands
Taveuni Island introduced
invasive
Smith, Albert C. (1991) (pp. 281-282)
Voucher cited: Weiner 71-7-14D
Fiji
Fiji Islands
Viti Levu Island introduced
invasive
Smith, Albert C. (1991) (pp. 281-282)
Vouchers cited: Greenwood 124, Smith 4312, Parks 20718, Gillespie 4176, DA 11085, DA 11107, DA 11203, DA 7435, DA 6082
Fiji
Fiji Islands
Yathata Island introduced
invasive
Smith, Albert C. (1991) (pp. 281-282)
Voucher cited: DA 15546
French Polynesia
Gambier Islands
Agakauitai Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Gambier Islands
Akamaru Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Gambier Islands
Akamaru Island introduced
St. John, Harold (1988) (p. 25)
Voucher cited: St. John 14692 (BISH)
French Polynesia
Gambier Islands
Aukena Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Gambier Islands
Aukena Island introduced
St. John, Harold (1988) (p. 25)
Voucher cited: St. John 14626 (BISH)
French Polynesia
Gambier Islands
Mangareva (Gambier) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: B. Huguenin s.n. (PAP)
Adventice
French Polynesia
Gambier Islands
Mangareva (Gambier) Island introduced
St. John, Harold (1988) (p. 25)
Vouchers cited: Agassiz 128 (GH), St. John 14529 (BISH)
French Polynesia
Marquesas Islands
Eiao Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Eiao Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence & M. Teikiteetini 9338 (PAP)
Adventice
French Polynesia
Marquesas Islands
Fatu Hiva Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Fatu Hiva Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: B.G. Decker 2604 (PAP)
Adventice
French Polynesia
Marquesas Islands
Hiva Oa Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Hiva Oa Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 4116 (PAP), J. Florence 4185 (PAP), J. Florence 8451 (PAP)
Adventice
French Polynesia
Marquesas Islands
Tahuata (Tuhuata) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Tahuata (Tuhuata) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: R.L. Oliver & P.A. Schäfer 3067 (PAP)
Adventice
French Polynesia
Marquesas Islands
Ua Huka (Huahuna, Uahuka) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Ua Huka (Huahuna, Uahuka) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: B.G. Decker 1839 (PAP)
Adventice
French Polynesia
Marquesas Islands
Ua Pou (Huapu, Uapou, Uapu) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Ua Pou (Huapu, Uapou, Uapu) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Society Islands
Bora Bora Island introduced
invasive
Welsh, S. L. (1998) (p. 72)
Voucher cited: Grant 4860
French Polynesia
Society Islands
Bora Bora Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 12003 (PAP)
Adventice
French Polynesia
Society Islands
Huahine Island introduced
invasive
Welsh, S. L. (1998) (p. 72)
Voucher cited: D. Bare 87
French Polynesia
Society Islands
Huahine Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence & R. Tahuaitu 11653 (PAP)
Adventice
French Polynesia
Society Islands
Maupiti (Maurua) Island introduced
invasive
Fosberg, F. R./Sachet, M.-H. (1987) (p. 67)
Vouchers cited: Fosberg 64886 (US) [forma pilosa]; Fosberg 64907 (US) [forma minor]
French Polynesia
Society Islands
Maupiti (Maurua) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: F.R. Fosberg 64886 (PAP)
Adventice
French Polynesia
Society Islands
Mehetia (Mahetia, Meetia) Island introduced
invasive
Welsh, S. L. (1998) (p. 72)
Voucher cited: Grant 4726
French Polynesia
Society Islands
Moorea Island introduced
invasive
Welsh, S. L. (1998) (p. 72)
Voucher cited: C. Carier 120
French Polynesia
Society Islands
Moorea Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 2151 (PAP), C.L. Cartier 120 (PAP), C.L. Cartier 234 (PAP)
Adventice
French Polynesia
Society Islands
Mopelia (Mapetia, Maupiha‘a, Maupihoa, Mopiha‘a) Atoll introduced
invasive
Sachet, M.-H. (1983) (p. 35)
Voucher cited: Sachet 927 (US)
French Polynesia
Society Islands
Raiatea (Havai) Island introduced
invasive
Welsh, S. L. (1998) (p. 72)
Voucher cited: Moore 313
French Polynesia
Society Islands
Raiatea (Havai) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 10443 (PAP), J. Florence 3459 (PAP)
Adventice
French Polynesia
Society Islands
Taha‘a Island introduced
invasive
Welsh, S. L. (1998) (p. 72)
Voucher cited: Fosberg & Sachet 63410
French Polynesia
Society Islands
Taha‘a Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 5262 (PAP), J. Florence 5255 (PAP)
Adventice
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Welsh, S. L. (1998) (p. 72)
Vouchers cited: Grant 4555, BRY 26025
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 2529 (PAP); var. minor (C.L. Blume) E.E. Sherff: J. Florence 2528 (PAP), J. Florence 4460 (PAP)
Adventice
French Polynesia
Society Islands
Tahiti Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1922) (voucher ID: PTBG 45114)
Taxon name on voucher: Bidens pilosa
French Polynesia
Society Islands
Tetiaroa Atoll introduced
invasive
Sachet, M.-H./Fosberg, F. R. (1983) (p. 53)
Vouchers cited: Fosberg 63792 (US); var. minor (Bl.) Sherff: Fosberg 54585 (US), Fosberg 63768 (US), Raynal 18026 (P), Florence 3256 (P, US)
French Polynesia
Society Islands
Tetiaroa Atoll introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 3256 (PAP)
Adventice
French Polynesia
Society Islands
Tupai Island introduced
invasive
Sachet, M.-H. (1983) (pp. 23-24)
Voucher cited: Sachet 1979 (US)
French Polynesia
Tuamotu Archipelago
Makatea (Ma‘atea) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 2985 (PAP)
Adventice
French Polynesia
Tuamotu Archipelago
Niau Atoll introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 10099 (PAP)
Adventice
French Polynesia
Tuamotu Archipelago
Rangiroa (Rairoa) Atoll introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 9996 (PAP), M.-H. Sachet 1349 (PAP)
Adventice
French Polynesia
Tuamotu Archipelago
Raro‘ia Atoll introduced
invasive
Meyer, Jean-Yves/Fourdrigniez, Marie (2008) (p. 13)
Adventice d'introduction européene.
French Polynesia
Tuamotu Archipelago
Takapoto Atoll introduced
invasive
Sachet, M-H. (1983) (pp. 38-39)
Voucher cited: Sachet 2075 (US)
French Polynesia
Tuamotu Archipelago
Takapoto Atoll introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: M.-H. Sachet 2075 (PAP)
Adventice
French Polynesia
Tuamotu Archipelago
Tikehau (Tikahau) Atoll introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 7021 (PAP), J. Florence 7114 (PAP)
Adventice
French Polynesia
Tuamotu Archipelago
Toau (Tovau) Atoll introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 10223 (PAP)
Adventice
French Polynesia
Austral (Tubuai) Islands
Raivavae (Raevavae) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 5603 (PAP), J. Florence 5781 (PAP), J. Florence 5811 (PAP)
Adventice
French Polynesia
Austral (Tubuai) Islands
Rapa Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 6278 (PAP); var. minor (C.L. Blume) E.E. Sherff: J. Florence 6358 (PAP)
Adventice
French Polynesia
Austral (Tubuai) Islands
Rapa Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2002) (voucher ID: PTBG 42036)
Taxon name on voucher: Bidens pilosa
French Polynesia
Austral (Tubuai) Islands
Rimatara (Rimitara) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Austral (Tubuai) Islands
Rurutu Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 6067 (PAP), J. Florence 6178 (PAP)
Adventice
French Polynesia
Austral (Tubuai) Islands
Tubuai Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
Guam
Guam Island
Guam Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 283)
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 279-281)
State of Hawaii
Hawaiian Islands
Kaho‘olawe Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 279-281)
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 279-281)
State of Hawaii
Hawaiian Islands
Lāna‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 279-281)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 279-281)
State of Hawaii
Hawaiian Islands
Moloka‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 279-281)
State of Hawaii
Hawaiian Islands
Ni‘ihau Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 279-281)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 279-281)
Japan (offshore islands)
Ogasawara (Bonin) Islands
Bonin (Ogasawara) Islands introduced
Kato, Hidetoshi (2007)
Var. minor (Blume) Sherff
Kiribati
Line Islands
Flint Island introduced
invasive
St. John, Harold/Fosberg, F. Raymond (1937) (p. 4)
Voucher cited: St. John & Fosberg 17453 (BISH)
Kiribati
Line Islands
Malden Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1995) (voucher ID: PTBG 37220)
Taxon name on voucher: Bidens pilosa L.
Kiribati
Line Islands
Starbuck Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1995) (voucher ID: PTBG 37219)
Taxon name on voucher: Bidens pilosa L.
Kiribati
Line Islands
Tabuaeran (Fanning) Atoll introduced
invasive
Wester, Lyndon (1985) (p. 31)
Kiribati
Line Islands
Teraina (Washington) Island introduced
invasive
Wester, Lyndon (1985) (p. 31)
Kiribati
Tungaru (Gilbert) Islands
Butaritari Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 283)
Kiribati
Tungaru (Gilbert) Islands
Butaritari Atoll introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. 77)
Kiribati
Tungaru (Gilbert) Islands
Butaritari Atoll   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1972) (voucher ID: PTBG 31143)
Taxon name on voucher: Bidens pilosa
Kiribati
Tungaru (Gilbert) Islands
Tarawa Atoll introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. 73)
Voucher: Imada 2003-28 (BISH 697643)
Marshall Islands
Ralik Chain
Enewetak (Ãnewetak, Eniwetok) Atoll introduced
invasive
Lamberson, J. O. (1982) (p. 61)
Marshall Islands
Ralik Chain
Enewetak (Ãnewetak, Eniwetok) Atoll introduced
Fosberg, F. Raymond (1990) (p. 38)
Marshall Islands
Ralik Chain
Kili (Kõle) Atoll introduced
Vander Velde, Nancy (year unknown)
Nauru
Nauru Island
Nauru Island   Swarbrick, John T. (1997) (p. 88)
Not seen by Thaman et al. May have been confused with Bidens alba.
New Caledonia
Îles Bélep (Belep Islands)
Île Art introduced
MacKee, H. S. (1994) (p. 32)
Voucher cited: MacKee 30556
New Caledonia
Récifs D'Entrecasteaux (D'Entrecasteaux Reefs)
Île Surprise introduced
MacKee, H. S. (1994) (p. 32)
Voucher cited: Blanchon 434, Boulet in MacKee 31456
New Caledonia
Îles Loyauté (Loyalte Islands)
Îles Loyauté (Loyalty Islands) introduced
invasive
Tassin, Jacques (2005)
New Caledonia
Îles Loyauté (Loyalte Islands)
Île Lifou introduced
MacKee, H. S. (1994) (p. 32)
Voucher cited: MacKee 5247
New Caledonia
Îles Loyauté (Loyalte Islands)
Île Maré introduced
MacKee, H. S. (1994) (p. 32)
Voucher cited: Däniker 2231
New Caledonia
Îles Loyauté (Loyalte Islands)
Îles Ouvéa (Ouvea Atoll) introduced
MacKee, H. S. (1994) (p. 32)
Voucher cited: Blanchon 1529
New Caledonia
Îles Loyauté (Loyalte Islands)
Île Tiga introduced
MacKee, H. S. (1994) (p. 32)
Voucher cited: MacKee 45878
New Caledonia
New Caledonia
New Caledonia Islands   Swarbrick, John T. (1997) (p. 88)
New Caledonia
New Caledonia
New Caledonia Islands introduced
invasive
Gargominy, Oliver/Bouchet, Philipe/Pascal, Michel/Jaffre, Tanguy/Tourneu, Jean-Christophe (1996) (p. 379)
Rudérale, nombreuses localités
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
Tassin, Jacques (2005)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
MacKee, H. S. (1994) (p. 32)
Vouchers cited: Védel s.n., Vieillard 797, Balansa 6a
New Caledonia
New Caledonia Archipelago
Île des Pins (Isle of Pines) introduced
invasive
Tassin, Jacques (2005)
New Caledonia
New Caledonia Archipelago
Île des Pins (Isle of Pines) introduced
MacKee, H. S. (1994) (p. 32)
Voucher cited: MacKee 15567
New Zealand (offshore islands)
Kermadec Islands
Kermadec Islands introduced
invasive
abo. intro.
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 212)
"Lowland fields, waste ground, swampy and boggy places".
New Zealand (offshore islands)
Kermadec Islands
Raoul Island introduced
invasive
Sykes, W. R. (1977) (p. 86)
New Zealand (offshore islands)
Kermadec Islands
Raoul Island introduced
invasive
Sykes, W. R./West, C. J. (1996) (p. 459)
Niue
Niue
Niue Island introduced
invasive
Sykes, W. R. (1970) (p. 63)
Vouchers cited: CHR 170496, CHR 170497, CHR 170498
Niue
Niue
Niue Island introduced
invasive
Whistler, W. A. (1988) (p. 9)
Niue
Niue
Niue Island introduced
invasive
Space, James C./Flynn, Tim (2000) (p. 7)
Niue
Niue
Niue Island introduced
invasive
Whistler, W. A./Atherton, J. (1997) (p. 26)
Niue
Niue
Niue Island introduced
invasive
Yuncker, T. G. (1943) (p. 118)
Voucher cited: Yuncker 9767 (BISH)
"A common roadside and plantation weed".
Niue
Niue
Niue Island introduced
invasive
Space, James C./Waterhouse, Barbara M./Newfield, Melanie/Bull, Cate (2004) (p. 39)
Palau
Palau (Belau ) (main island group)
Peleliu (Beliliou) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 283)
Papua New Guinea
Bismarck Archipelago
Bismarck Archipelago   Peekel, P. G. [translated by E. E. Henty] (1984) (p. 565)
Sporadic.
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) invasive
Henty, E. E./Pritchard, G. H. (1975) (p. 64)
From low altitudes to over 2000 m.
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Philippines
Philippine Islands
Philippine Islands introduced
invasive
Waterhouse, D. F. (1993) (pp. 63,76)
Philippines
Philippine Islands
Philippine Islands   Merrill, Elmer D. (1923) (p. 614)
In waste places, chiefly at medium altitudes, ascending to 2,200 m.
Pitcairn Islands
Pitcairn Islands
Pitcairn Island introduced
invasive
St. John, H. (1987) (p. 53)
Vouchers cited: R. A. Young 15, J. P. Chapin 980
Pitcairn Islands
Pitcairn Islands
Pitcairn Island introduced
Fosberg, F. R./Paulay, Gustav/Spencer, T./Oliver, Royce (1989) (p. 15)
Voucher cited: Paulay, Spencer & Schuster 668 (US)
Pitcairn Islands
Pitcairn Islands
Pitcairn Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 10746 (PAP), J. Florence & S. Waldren 11041 (PAP)
Adventice
Samoa
Western Samoa Islands
Savai‘i Island introduced
invasive
Space, James C./Flynn, Tim (2002) (p. Field notes.)
Samoa
Western Samoa Islands
Upolu Island introduced
invasive
Space, James C./Flynn, Tim (2002) (p. Field notes.)
Solomon Islands
Solomon Islands
Solomon Islands   Swarbrick, John T. (1997) (p. 88)
Solomon Islands
Solomon Islands
Solomon Islands native
Hancock, I. R./Henderson, C. P. (1988) (p. 51)
Tonga
Ha‘apai Group
Ha‘ano Island introduced
invasive
Space, James C./Flynn, Tim (2001) (p. 70)
Tonga
Ha‘apai Group
Lifuka and Foa Islands introduced
invasive
Space, James C./Flynn, Tim (2001) (p. 70)
Tonga
Ha‘apai Group
Tofua Island   Whistler, W. A. (1992) (p. 8)
Voucher cited: Scarth-Johnson 84
Tonga
Ha‘apai Group
‘Uiha Island introduced
invasive
Space, James C./Flynn, Tim (2001) (p. 70)
Tonga
Tonga Islands
Tonga Islands   Yuncker, T. G. (1959) (p. 269)
"Found throughout Tonga".
Tonga
Tongatapu Group
‘Eua Island introduced
invasive
Space, James C./Flynn, Tim (2001) (p. 58)
Tonga
Tongatapu Group
‘Eua Island   Whistler, W. A. (1992) (p. 8)
Vouchers cited: Soakai 399, Soakai 897
Tonga
Tongatapu Group
‘Eua Island   Yuncker, T. G. (1959) (p. 269)
Voucher cited: Yuncker 15605
Tonga
Tongatapu Group
Tongatapu Island introduced
invasive
Space, James C./Flynn, Tim (2001) (p. 51)
Tonga
Tongatapu Group
Tongatapu Island   Whistler, W. A. (1992) (p. 8)
Vouchers cited: Setchell & Parks 15330, Soakai 465, Soakai 607, Soakai 611
Tonga
Tongatapu Group
Tongatapu Island   Yuncker, T. G. (1959) (p. 269)
Voucher cited: Yuncker 15184
Tonga
Tongatapu Group
Tongatapu Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1989) (voucher ID: PTBG 3907)
Taxon name on voucher: Bidens pilosa
Tonga
Vava‘u Group
Vava‘u Island introduced
invasive
Space, James C./Flynn, Tim (2001) (p. 64)
Tonga
Vava‘u Group
Vava‘u Island   Whistler, W. A. (1992) (p. 8)
Vouchers cited: Soakai 872, Soakai 875
Tonga
Vava‘u Group
Vava‘u Island   Yuncker, T. G. (1959) (p. 269)
Cited: Crosby.
Tonga
Vava‘u Group
Vava‘u Island   Burkill, I. H. (1900) (p. 44)
United States (other Pacific offshore islands)
Johnston Atoll
Johnston Island introduced
invasive
Amerson, A. Binion, Jr./Shelton, Philip C. (1976) (p. 60)
United States (other Pacific offshore islands)
Midway Atoll
Midway Atoll introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 279-281)
Vanuatu
New Hebrides Islands
Vanuatu (Republic of)   Whistler, W. A. (1988) (p. 9)
Wallis and Futuna
Wallis and Futuna (Horne) Islands
Alofi Island introduced
invasive
Orapa, Warea (2005)
Wallis and Futuna
Wallis and Futuna (Horne) Islands
Futuna Island introduced
invasive
Orapa, Warea (2005)
Wallis and Futuna
Wallis and Futuna (Horne) Islands
Wallis (‘Uvea) Island introduced
invasive
Orapa, Warea (2005)
Wallis and Futuna
Wallis and Futuna (Horne) Islands
Wallis (‘Uvea) Island introduced
invasive
Meyer, Jean-Yves (2007) (p. 31)
Wallis and Futuna
Wallis and Futuna (Horne) Islands
Wallis and Futuna Islands   Whistler, W. A. (1988) (p. 9)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia
Australia (continental)
Queensland introduced
invasive
Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (p. 189)
Cambodia
Cambodia
Cambodia (Kingdom of) introduced
invasive
Waterhouse, D. F. (1993) (pp. 63,76)
Chile (continental)
Chile
Chile (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
China
China
China (People's Republic of) introduced
invasive
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Roadsides, fields, villages; below 2500 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Henan, Hubei, Hunan, Jiangxi, Liaoning, Shaanxi, Shandong, Shanxi, Sichuan, Xizang, Yunnan, Zhejiang.
China
China
Hong Kong native
Wu, Te-lin (2001) (p. 276)
In wasteland.
Colombia
Colombia
Colombia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Costa Rica
Costa Rica
Costa Rica (Republic of) native
Missouri Botanical Garden (2013)
El Salvador
El Salvador
El Salvador (Republic of) native
Missouri Botanical Garden (2013)
Guatemala
Guatemala
Guatemala (Republic of) native
Missouri Botanical Garden (2013)
Honduras
Honduras
Honduras (Republic of) native
Missouri Botanical Garden (2013)
Indonesia
Indonesia
Indonesia (Republic of) introduced
invasive
Waterhouse, D. F. (1993) (pp. 63,76)
Japan
Japan
Japan (country) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 189)
var. pilosa, var. bisetosa Ohtani & Shig. Suzuki, var. intermedia Ohtani & Shig. Suzuki, var. minor (Blume) Sherff and var. radiata Sherff
South Korea
South Korea
South Korea (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Malaysia
Malaysia
Malaysia (country of) introduced
invasive
Waterhouse, D. F. (1993) (pp. 63,76)
Mexico
Mexico
Mexico (United Mexican States) native
Missouri Botanical Garden (2013)
New Zealand
New Zealand
New Zealand (country) introduced
invasive
abo. intro.
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 212)
"Lowland fields, waste ground, swampy and boggy places".
Nicaragua
Nicaragua
Nicaragua (Republic of) native
Missouri Botanical Garden (2013)
Panama
Panama
Panama (Republic of) native
Missouri Botanical Garden (2013)
Perú
Perú
Perú (Republic of) native
Missouri Botanical Garden (2013)
Singapore
Singapore
Singapore (Republic of) introduced
invasive
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 18)
Naturalised
Taiwan
Taiwan Island
Taiwan Island introduced
invasive
Ching-I Peng, ed. (2013)
"Roadsides and cultivated fields from low to middle elevations".
Thailand
Thailand
Thailand (Kingdom of) introduced
invasive
Waterhouse, D. F. (1993) (pp. 63,76)
United States (west coast)
United States (west coast states)
USA (California) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Vietnam
Vietnam
Vietnam (Socialist Republic of) introduced
invasive
Waterhouse, D. F. (1993) (pp. 63,76)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia (Indian Ocean offshore islands)
Christmas Island Group
Christmas Island introduced
invasive
Swarbrick, J. T. (1997) (p. 106)
Australia (Indian Ocean offshore islands)
Christmas Island Group
Christmas Island introduced
invasive
Orchard, Anthony E., ed. (1993) (p. 17)
Var. minor (Blume) Sherff
British Indian Ocean Territory
Chagos Archipelago
Diego Garcia Island introduced
invasive
Topp, J. M. W. (1988) (p. 9)
British Indian Ocean Territory
Chagos Archipelago
Diego Garcia Island introduced
invasive
Rivers, Julie (2004) (p. 3)
Probably Bidens alba based on voucher by Whistler.
La Réunion (France)
La Réunion Island
La Réunion Island introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Mauritius
Mautitius Islands (Mauritius and Rodrigues)
Mauritius Island introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
French Territory of Mayotte
Mayotte Islands
Mayotte Island introduced
invasive
Comité français de l'Union Internationale pour la Conservation de la Nature en France (2013)
Seychelles
Seychelles Islands
Agalega Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Stoddart, D. R. (1983) (p. 114)
Voucher cited: Stoddart 7246 (US)
Seychelles
Seychelles Islands
D'Arros Island   Stoddart, D. R./Coe, M. J./Fosberg, F. R. (1979) (p. 25)
Vouchers cited: Gwynne & Wood 1005 (EA), Stoddart 7211 (US)
Seychelles
Seychelles Islands
Marie-Louise Island   Wilson, J. R. (1983) (p. 189)
Seychelles
Seychelles Islands
Poivre Island   Robertson, S. A./Fosberg, F. R. (1983) (p. 169)
Voucher cited: Robertson 2389 (K)
Seychelles
Seychelles Islands
Seychelles Islands introduced
Weber, Ewald (2003) (p. 69)
Seychelles
Seychelles Islands
St. Joseph Island   Stoddart, D. R./Coe, M. J./Fosberg, F. R. (1979) (p. 48)
Voucher cited: Gwynne & Wood 956 (EA)
Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Canada (except British Colombia)
Canada
Canada (country) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Ontario, Quebec
Naturalized
United States (continental except west coast)
United States (other states)
United States (other states) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
United States (continental except west coast)
United States (other states)
USA (Florida) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized

Comments:  Several varieties. Usually invasive wherever present.

Control: 

Physical: "Germination is prevented by mulches if they are thick enough and left undisturbed.  It is susceptible to hand weeding, chipping and cultivation.  Unpalatable to stock.  As it prefers full sunlight it can be controlled by competition from leafy crops, such as cassava and sweet potato.  Tolerates dry air and soil conditions"  (Swarbrick, 1997).  "Grazed by livestock"  (Motooka et al., 2003).

Chemical:   "Susceptible to: 1) residual herbicides, including diuron, bromacil, atrazine, simazine, ropazine, hexazinone, oryzalin and ametryn at standard rates; 2) translocated herbicides, including 2,4-D, glyphosate, amitrole, metribuzin and dicamba at standard rates; 3) contact herbicides including bentazone, diquat and paraquat at standard rates.  Probably susceptible to most herbicides suitable for controlling broad-leaved plants" (Swarbrick, 1997).  "Sensitive to hormone type herbicides"  (Motooka et al., 2003).

Biological: See Waterhouse and Norris (1987; pp. 274-276) and Waterhouse (1994; pp. 28-33) for identification of natural enemies.


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

  [   PIER species lists  ]   [   PIER home  ]

This page was created on 1 JAN 1999 and was last updated on 5 MAR 2010.