Eleocharis geniculata (L.) Roem. & Schult., Cyperaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

Chinese: hei zi bi qi

English: Canada spikesedge, bent spikerush, spike rush, spikerush

French: scirpe genouillé

I-Kiribati: te maunei

Kwara‘ae: ngwano

Maori (Cook Islands): remu, rimu

Marshallese: kube in jemin, kubwe in jemin Inidel, kubwe in jenen Iniriñ, pãdãdijmaan, pãdãlimaan

Palauan: kerdikes

Pohnpeian: mahtamat

Spanish: cebolleta de pantano, junco de espiga elegante, mara, piso

Tuvaluan: mouku loa

Habit:  sedge

Description:  "Annuals, culms densely tufted, pale or green and slightly glaucous, filiform, 7-30 cm tall, 0.2-0.5 mm in diameter.  Sheaths pale green, often tinged reddish brown in lower part, o.5-3 cm long, orifice truncate.  Spikelets many-flowered, rusty or pale brown, broadly ovoid to ovoid-ellipsoid, 3-7 mm long, 3-4 mm wide, obtuse; glumes pale brown, membranous, broadly elliptic to ovate, ca. 2 mm long, obtuse, the mid-nerve green, ending below the glume apex; bristles 6-7, rusty brown, retrorsely spinulose, slightly longer than the achene; style base depressed-conical, nearly 1/3 as wide as achene; stigmas 2.  Achenes black, glossy, smooth, broadly obovoid, thickly biconvex, ca. 1 mm long"  (Wagner et al., 1999; pp. 1402-1403).

Habitat/ecology:  In Hawai‘i, "naturalized in moist ground, marshy places, salt marshes, taro paddies and seeps, 0-760 m"  (Wagner et al., 1999; pp. 1402-1403).  In Fiji, "a naturalized adventive but apparently not common, occurring between sea level and 200 m in low-lying wet areas near coasts, often in coral sand, or in forest in rocky places"  (Smith, 1979; p. 240).  In Guam, "in marshes, swamps, and at the edges of mangrove swamps. (Stone, 1970; p. 171).

Propagation:  Seed

Native range:  "Widespread in tropical and subtropical regions of both hemispheres"  (Smith, 1979. p. 240).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
American Samoa American Samoa Islands	American Samoa Islands		Waterhouse, D. F. (1997) (p. 61)
American Samoa Swain's Island	Swain's Island	native	Whistler, W. A. (1983) (p. 17) Voucher cited: Whistler 3352A
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Rota Island	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Commonwealth of the Northern Mariana Islands (US) Saipan	Saipan Island	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Cook Islands Northern Cook Islands	Manihiki Atoll		McCormack, Gerald (2013)
Cook Islands Northern Cook Islands	Nassau Island		McCormack, Gerald (2013)
Cook Islands Northern Cook Islands	Rakahanga Atoll		McCormack, Gerald (2013)
Cook Islands Northern Cook Islands	Rakahanga Atoll		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1985) (voucher ID: PTBG 41602) Taxon name on voucher: Eleocharis geniculata
Cook Islands Southern Cook Islands	‘Atiu Island		McCormack, Gerald (2013)
Cook Islands Southern Cook Islands	Ma‘uke Island		McCormack, Gerald (2013)
Cook Islands Southern Cook Islands	Miti‘aro Island		McCormack, Gerald (2013)
Cook Islands Southern Cook Islands	Miti‘aro Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1985) (voucher ID: PTBG 41604) Taxon name on voucher: Eleocharis geniculata
Cook Islands Southern Cook Islands	Palmerston (Avarau) Island		McCormack, Gerald (2013)
Cook Islands Southern Cook Islands	Rarotonga Island		McCormack, Gerald (2013)
Cook Islands Southern Cook Islands	Rarotonga Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1982) (voucher ID: PTBG 41601) Taxon name on voucher: Eleocharis geniculata
Ecuador (Galápagos Islands) Isabela Group	Isabela Island	possibly introduced invasive	Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands) Isabela Group	Volcán Sierra Negra, Isabela Island	possibly introduced invasive	Charles Darwin Foundation (2008)
Federated States of Micronesia Chuuk Islands	Fefan Island		Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
Federated States of Micronesia Chuuk Islands	Losap Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Federated States of Micronesia Chuuk Islands	Namonuito (Namonweito, Nómwun Wiité) Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Federated States of Micronesia Chuuk Islands	Puluwat (Pwonowót) Atoll	native	Manner, H. I./Mallon, E. (1989) (p. 37) Vouchers cited: Manner & Mallon 139 (GUAM), Manner & Mallon 141 (GUAM)
Federated States of Micronesia Chuuk Islands	Satawan Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Federated States of Micronesia Pohnpei Islands	Pohnpei Island	native	Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. (2010) (p. 42) Vouchers cited: E. Albert 36b (NY, PTBG), S. Perman 21407 (PTBG), A. Rinehart LR25213 (BISH), L. Stemmerman 2973 (BISH)
Federated States of Micronesia Pohnpei Islands	Pohnpei Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2002) (voucher ID: PTBG 41801) Taxon name on voucher: Eleocharis geniculata
Federated States of Micronesia Pohnpei Islands	Pohnpei Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2007) (voucher ID: PTBG 50089) Taxon name on voucher: Eleocharis geniculata
Federated States of Micronesia Yap Islands	Faraulep (Faraulap) Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Federated States of Micronesia Yap Islands	Ulithi Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Federated States of Micronesia Yap Islands	Woleai Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Federated States of Micronesia Yap Islands	Yap (Waqab) Island	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Fiji Fiji Islands	Kanathea Island	introduced invasive	Smith, Albert C. (1979) (p. 240) Voucher cited: DA L.14761 Not common.
Fiji Fiji Islands	Kandavu Island	introduced invasive	Smith, Albert C. (1979) (p. 240) Voucher cited: DA 2996 Not common.
Fiji Fiji Islands	Ngau Island	introduced invasive	Smith, Albert C. (1979) (p. 240) Voucher cited: Milne 178 Not common.
Fiji Fiji Islands	Ovalau Island	introduced invasive	Smith, Albert C. (1979) (p. 240) Vouchers cited: DA 14512, Milne 223 Not common.
Fiji Fiji Islands	Viti Levu Island	introduced invasive	Smith, Albert C. (1979) (p. 240) Vouchers cited: Greenwood 925, DA 11863, MacGillivray 22 Not common.
French Polynesia Clipperton Island	Clipperton (Arue, Avera) Island		Sachet, M.-H. (1962) (p. 92)
French Polynesia Marquesas Islands	Nuku Hiva (Nukahiva) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Adventice
French Polynesia Society Islands	Huahine Island	introduced invasive	Welsh, S. L. (1998) (pp. 315-316) Voucher cited: McKee 3111
French Polynesia Society Islands	Huahine Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: J. Florence & R. Tahuaitu 11720 (PAP) Adventice
French Polynesia Society Islands	Maupiti (Maurua) Island		Fosberg, F. R. (1997) (p. 38)
French Polynesia Society Islands	Moorea Island	introduced invasive	Welsh, S. L. (1998) (pp. 315-316) Voucher cited: Florence 2148
French Polynesia Society Islands	Moorea Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence 2131 (PAP), J. Florence 2148 (PAP), J. Florence 4799 (PAP) Adventice
French Polynesia Society Islands	Raiatea (Havai) Island	introduced invasive	Welsh, S. L. (1998) (pp. 315-316) Vouchers cited: Moore 44, BRY 26481
French Polynesia Society Islands	Raiatea (Havai) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence 3488 (PAP), P. Morat 7012 (PAP) Adventice
French Polynesia Society Islands	Taha‘a Island	introduced invasive	Welsh, S. L. (1998) (pp. 315-316) Voucher cited: Fosberg 63495
French Polynesia Society Islands	Taha‘a Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: J. Florence 5238 (PAP) Adventice
French Polynesia Society Islands	Tahiti Island	introduced invasive	Welsh, S. L. (1998) (pp. 315-316) Voucher cited: Leland et al. 5
French Polynesia Society Islands	Tahiti Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence 3971 (PAP), J. Florence 7862 (PAP), J. Florence , P. Birnbaum & M. Chaine 9858 (PAP) Adventice
French Polynesia Society Islands	Tahiti Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1981) (voucher ID: PTBG 38262) Taxon name on voucher: Eleocharis geniculata (L.) Roem. & Schult.
French Polynesia Society Islands	Tetiaroa Atoll	introduced invasive	Sachet, M.-H./Fosberg, F. R. (1983) (p. 38) Vouchers cited: Fosberg & Sachet 54645 (US), Raynal 18016 (P), Fosberg 63772 (US)
French Polynesia Society Islands	Tupai Island	introduced invasive	Welsh, S. L. (1998) (pp. 315-316) Voucher cited: Grant 4834
French Polynesia Society Islands	Tupai Island		Sachet, M.-H. (1983) (p. 14) Voucher cited: Grant 4834 (BISH), Sachet 1985 (US)
French Polynesia Tuamotu Archipelago	Makatea (Ma‘atea) Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Adventice
French Polynesia Tuamotu Archipelago	Niau Atoll	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: J. Florence 10131 (PAP) Adventice
French Polynesia Tuamotu Archipelago	Tikehau (Tikahau) Atoll	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: J. Florence 7029 (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 6263 (PAP) Adventice
French Polynesia Austral (Tubuai) Islands	Rapa Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2002) (voucher ID: PTBG 42097) Taxon name on voucher: Eleocharis geniculata
French Polynesia Austral (Tubuai) Islands	Rurutu Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence 5562 (PAP), J. Florence 5933 (PAP) Adventice
Guam Guam Island	Guam Island	native	Stone, Benjamin C. (1970) (p. 171) Vouchers cited: Stone 3868 (GUAM), Stone 4888 (GUAM)
Guam Guam Island	Guam Island	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1402-1403)
State of Hawaii Hawaiian Islands	Lāna‘i Island	introduced invasive	Imada, Clyde T./James, Shelly A./Kennedy, Barbara H. (2008) (pp. 12-13) Voucher cited: C. Imada, S. James & P. Imada 2007-16 (BISH)
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive	Oppenheimer, Hank L. (2003) (p. 10) West Maui. Vouchers cited: Oppenheimer H40105 (BISH, PTBG), Oppenheimer H110152 (BISH, PTBG)
State of Hawaii Hawaiian Islands	Moloka‘i Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1402-1403)
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1402-1403) Voucher cited: Forbes s.n. (BISH)
Kiribati Tungaru (Gilbert) Islands	Butaritari Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Kiribati Tungaru (Gilbert) Islands	Butaritari Atoll	introduced invasive	Space, James C./Imada, Clyde T. (2004) (p. 10) Voucher specimens collected: Imada 2003-57 (BISH 697672), Imada 2003-58 (BISH 697673)
Kiribati Tungaru (Gilbert) Islands	Butaritari Atoll		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1972) (voucher ID: PTBG 22988) Taxon name on voucher: Eleocharis geniculata (L.) Roem. & Schult.
Kiribati Tungaru (Gilbert) Islands	Maiana Atoll	introduced invasive	Space, James C./Imada, Clyde T. (2004) (p. 10) Voucher: Imada 2003-107 (BISH 697718)
Kiribati Tungaru (Gilbert) Islands	Marakei Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Kiribati Tungaru (Gilbert) Islands	Onotoa Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Kiribati Tungaru (Gilbert) Islands	Onotoa Atoll	cultivated	Moul, Edwin T. (1957) (p. 9) Vouchers cited: Moul 8159 (US), Moul 8337 (US), Moul 8210 (US)
Kiribati Tungaru (Gilbert) Islands	Tarawa Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Kiribati Tungaru (Gilbert) Islands	Tarawa Atoll	introduced invasive	Space, James C./Imada, Clyde T. (2004) (p. 10) Voucher: Imada 2003-38 (BISH 697653)
Marshall Islands Ralik Chain	Ebon (Epoon) Atoll	native	Fosberg, F. Raymond (1990) (p. 23)
Marshall Islands Ralik Chain	Jaluit (Jãlwõj) Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Marshall Islands Ralik Chain	Jaluit (Jãlwõj) Atoll	native	Fosberg, F. R./Sachet, M.-H. (1962) (p. 8) Voucher cited: Fosberg 39466 (US)
Marshall Islands Ralik Chain	Kili (Kõle) Atoll	native	Vander Velde, Nancy/Vander Velde, Brian (2006) (p. 3) "Rare; small patch near grassy area of wetland to the north, not too far from ocean road".
Marshall Islands Ralik Chain	Kwajalein (Kuwajleen) Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Marshall Islands Ralik Chain	Kwajalein (Kuwajleen) Atoll	possibly native	Whistler, W. A./Steele, O. (1999) (p. 75) Vouchers cited: Fosberg 41377, Whistler 11237
Marshall Islands Ralik Chain	Kwajalein (Kuwajleen) Atoll		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1998) (voucher ID: PTBG 44973) Taxon name on voucher: Eleocharis geniculata
Marshall Islands Ratak Chain	Ailuk (Aelok) Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Marshall Islands Ratak Chain	Ailuk (Aelok) Atoll	introduced invasive	Fosberg, F. R. (1955) (p. 5) Voucher cited: Fosberg 33969 (US)
Marshall Islands Ratak Chain	Arno Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Marshall Islands Ratak Chain	Arno Atoll		Vander Velde, Nancy/Vander Velde, Brian (2009) (p. 4) Voucher cited: Vander Velde 0629200903
Marshall Islands Ratak Chain	Likiep Atoll	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Marshall Islands Ratak Chain	Likiep Atoll	introduced invasive	Fosberg, F. R. (1955) (p. 5) Voucher cited: Fosberg 33825 (US)
Marshall Islands Ratak Chain	Majuro (Mãjro) Atoll	native	Vander Velde, Nancy (2003) (p. 38) Rare
Marshall Islands Ratak Chain	Maloelap Atoll		Imada, Clyde (2006)
Marshall Islands Ratak Chain	Mejit (Mãjej) Island	native	Fosberg, F. Raymond (1990) (p. 23)
Marshall Islands Ratak Chain	Mili (Mile) Atoll	native	Vander Velde, Nancy/Vander Velde, Brian (2010) (p. A5) Uncommon; few patches in ponds near homes part way down runway and in old bomb holes to the south of Mili. Voucher 0725201005 (BISH, GUAM, PTBG)
Marshall Islands Ratak Chain	Wotje (Wõjjã) Atoll		Vander Velde, Nancy/Vander Velde, Brian (2009) (p. 1) Voucher cited: Vander Velde 0513200910
Palau Palau (Belau ) (main island group)	Angaur (Ngeaur) Island	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Palau Palau (Belau ) (main island group)	Angaur (Ngeaur) Island		Beleu National Museum (Republic of Palau. Koror.) (1977) (voucher ID: BNM 914) Taxon name on voucher: Eleocharis geniculata (L.) R. & S.
Palau Palau (Belau ) (main island group)	Babeldaob Island	native	Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. Field notes and voucher.) Voucher: Lorence 9815 (PTBG, BNM)
Palau Palau (Belau ) (main island group)	Babeldaob Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 108) Taxon name on voucher: Eleocharis geniculata (L.) Roem. & Schult.
Palau Palau (Belau ) (main island group)	Koror (Oreor) Island	native	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 69)
Palau Palau (Belau ) (main island group)	Koror (Oreor) Island		Beleu National Museum (Republic of Palau. Koror.) (1977) (voucher ID: BNM 10019) Taxon name on voucher: Eleocharis geniculata (L.) DC.
Philippines Philippine Islands	Philippine Islands		Hafliger, E. (1092) (p. 33)
Philippines Philippine Islands	Philippine Islands	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Solomon Islands Solomon Islands	Solomon Islands		Waterhouse, D. F. (1997) (p. 61)
Solomon Islands Solomon Islands	Solomon Islands	native	Hancock, I. R./Henderson, C. P. (1988) (p. 71)
Tonga Ha‘apai Group	Kao Island	native	Whistler, W. A. (1992) (p. 85) Voucher cited: Yuncker 15974
Tonga Ha‘apai Group	Kao Island		Yuncker, T. G. (1959) (p. 71) Voucher cited: Yuncker 15974
Tuvalu Tuvalu (Ellis) Islands	Tuvalu Islands		Unknown (year unknown)

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)	New South Wales	native	National Herbarium of New South Wales (2013)
Australia Australia (continental)	Australia (continental)	native	National Herbarium of New South Wales (2013) Southern Australia, Western Australia
Australia Australia (continental)	Northern Territory	native	National Herbarium of New South Wales (2013)
Australia Australia (continental)	Queensland	native	National Herbarium of New South Wales (2013)
British Columbia (province of Canada) Province of British Columbia	Canada (British Columbia)	native	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Central America Central America (Pacific rim)	Costa Rica (Republic of)		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 138)
China China	China (People's Republic of)	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) Shallow water margins at trail edges, sandy coastal habitats; near sea level. Fujian, Guangdong, Hainan.
China China	Hong Kong	native	Wu, Te-lin (2001) (p. 312) In marshes, wet places and paddy fields.
Indonesia Indonesia	Indonesia (Republic of)	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Japan Ryukyu Islands	Ryukyu Islands	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Malaysia Malaysia	Malaysia (country of)	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Mexico Mexico	Mexico (United Mexican States)		Hafliger, E. (1092) (p. 33)
Singapore Singapore	Singapore (Republic of)	uncertain if introduced invasive	Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 38) Weed of uncertain origin
South America (Pacific rim) South America (Pacific rim)	Colombia		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 138)
Taiwan Taiwan Island	Taiwan Island	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) Shallow water margins at trail edges, sandy coastal habitats; near sea level.
Thailand Thailand	Thailand (Kingdom of)	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
United States (west coast) United States (west coast states)	USA (California)	native	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)

Indian Ocean
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
British Indian Ocean Territory Chagos Archipelago	Diego Garcia Island		Stoddart, D. R./Taylor, J. D., eds. (1971) (p. 147) Voucher cited: Stoddart 800 (K, US)
British Indian Ocean Territory Chagos Archipelago	Diego Garcia Island	possibly introduced invasive	Whistler, W. Arthur (1996) (p. 24)
British Indian Ocean Territory Chagos Archipelago	Diego Garcia Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1995) (voucher ID: PTBG 44369) Taxon name on voucher: Eleocharis geniculata

Also reported from
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Canada Canada	Canada	native	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013) Ontario
United States (continental except west coast) United States (other states)	United States (other states)	native	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (continental except west coast) United States (other states)	USA (Florida)	native	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)

Control:  If you know of control methods for Eleocharis geniculata, please let us know.