Pacific Island Ecosystems at Risk (PIER)

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Aeschynomene americana
L., Fabaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 12 (Go to the risk assessment)

Common name(s): [more details]

Chinese: min gan he meng

English: American joint vetch, joint vetch, shyleaf

Spanish: pega pega, pulmón

Habit:  herb

Description:  "An erect-ascending, annual or short-lived perennial, shrub-like legume, 1 to 2 m tall. Stems hairless, often hard but pithy in the lower regions; upper sections hairy, usually glandular. Leaves 3 to 7 cm long. Leaflets 8 to 38 pairs, 5 to 15 mm long, 1 to 2 mm wide, linear or linear to oblong, sensitive, folding together when touched. Stipules persistent, linear-lanceolate, 1 to 2 cm long. Inflorescence a loose, few-flowered raceme, often branched. Calyx about 4 mm long, deeply two-lipped. Corolla varying in colour from white tinged with mauve or light violet to purple to flesh coloured, sometimes pinkish orange, 6 to 10 mm long. Pod usually slightly curved, four to eight jointed, up to 4 cm long, the upper margin entire, the lower deeply indented at each segment joint; each segment one-seeded; semi-circular, about 4 mm long. Seeds grey-green to dark and light brown" (FAO).

Habitat/ecology:  "Essentially a wetland plant, requiring a minimum of 1,000 mm mean annual rainfall.  Sea level to 1,000 m in Jamaica (Adams, 1972).  Var. flabellata is found mainly in wet or moist places at elevations up to 2,800 m.  Quite widely adapted, but particularly suited to wet, low-lying, sandy soils and to similarly located solodics of coastal lowland country" (FAO). In New Guinea, "a weed of grazing land, avoided by stock and thus able to out-grow more palatable species if not controlled. Lowland localities with marked dry seasons" (Henty & Pritchard, 1975).

Propagation:  Seed

Native range:  "Native to Central America and tropical South America, extending as far south as Argentina and north to Florida, United States, and the West Indies" (FAO).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Saipan Island introduced
Raulerson, L. (2006) (p. 35)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Tinian Island introduced
Raulerson, L. (2006) (p. 35)
Federated States of Micronesia
Kosrae Island
Kosrae Island introduced
Space, James C./Waterhouse, Barbara/Denslow, Julie S./Nelson, Duane/Waguk, Erick E. (2000) (p. Voucher specimen)
Voucher: BMW 5777 (BISH, BRI)
Federated States of Micronesia
Kosrae Island
Kosrae Island introduced
invasive
Lorence, David H./Flynn, Timothy (2010) (p. 16)
Voucher cited: Lorence 9389 (PTBG)
Naturalized
Federated States of Micronesia
Kosrae Island
Kosrae Island introduced
invasive
Josekutty, P. C./Wakuk, E. E./Joseph, M. J. (2002) (p. 62)
Federated States of Micronesia
Kosrae Island
Kosrae Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1996) (voucher ID: PTBG 24907)
Taxon name on voucher: Aeschynomene americana L.
Federated States of Micronesia
Kosrae Island
Kosrae Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2005) (voucher ID: PTBG 44955)
Taxon name on voucher: Aeschynomene americana
Federated States of Micronesia
Yap Islands
Yap (Waqab) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 102)
Guam
Guam Island
Guam Island introduced
Raulerson, L. (2006) (p. 35)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
MacKee, H. S. (1994) (p. 80)
Vouchers cited: Däniker 1686 (Z), MacKee 15544, MacKee 28595, Thomas in MacKee 39279
Palau
Palau (Belau ) (main island group)
Babeldaob Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 102)
Palau
Palau (Belau ) (main island group)
Babeldaob Island introduced
invasive
Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 3)
Vouchers: Lorence 9812 (PTBG, BNM, NY, BISH, US), Lorence 9915 (PTBG, BNM, NY, US)
Palau
Palau (Belau ) (main island group)
Babeldaob Island   Beleu National Museum (Republic of Palau. Koror.) (1982) (voucher ID: BNM 3156)
Taxon name on voucher: Aeschynomene americana L.
Palau
Palau (Belau ) (main island group)
Babeldaob Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 105)
Taxon name on voucher: Aeschynomene americana L.
Palau
Palau (Belau ) (main island group)
Babeldaob Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 208)
Taxon name on voucher: Aeschynomene americana L.
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 102)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island   Beleu National Museum (Republic of Palau. Koror.) (1966) (voucher ID: BNM 1240)
Taxon name on voucher: Aeschynomene americana L.
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island   Beleu National Museum (Republic of Palau. Koror.) (1966) (voucher ID: BNM 415)
Taxon name on voucher: Aeschynomene americana L.
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island   Beleu National Museum (Republic of Palau. Koror.) (1977) (voucher ID: BNM 10015)
Taxon name on voucher: Aeschynomene americana L.
Palau
Palau (Belau ) (main island group)
Ngerkebesang Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 102)
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) introduced
invasive
Henty, E. E./Pritchard, G. H. (1975) (p. 110)
Established in a few lowland localities with marked dry seasons.
Philippines
Philippine Islands
Philippine Islands introduced
cultivated
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Philippines
Philippine Islands
Philippine Islands   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 9)
Vanuatu
New Hebrides Islands
Vanuatu (Republic of) introduced
cultivated
U.S. Dept. Agr., Agr. Res. Serv. (2013)
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)
Australia (continental) introduced
cultivated
U.S. Dept. Agr., Agr. Res. Serv. (2013)
China
China
Hong Kong introduced
cultivated
Wu, Te-lin (2001) (p. 138)
Colombia
Colombia
Colombia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Costa Rica
Costa Rica
Costa Rica (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Ecuador (Mainland)
Ecuador
Ecuador (Republic of) (continental) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
El Salvador
El Salvador
El Salvador (Republic of) native
ILDIS Co-ordinating Centre (2013)
Guatemala
Guatemala
Guatemala (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Honduras
Honduras
Honduras (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Indonesia
Indonesia
Indonesia (Republic of) introduced
cultivated
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 184)
Mexico
Mexico
Mexico (United Mexican States) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Nicaragua
Nicaragua
Nicaragua (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Panama
Panama
Panama (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Perú
Perú
Perú (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Singapore
Singapore
Singapore (Republic of) introduced
invasive
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 10)
Naturalised
Taiwan
Taiwan Island
Taiwan Island introduced
invasive
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Roadsides
Thailand
Thailand
Thailand (Kingdom of) introduced
cultivated
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Vietnam
Vietnam
Vietnam (Socialist Republic of) introduced
cultivated
U.S. Dept. Agr., Agr. Res. 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 introduced
invasive
Rivers, Julie (2004) (p. 5)
var. glandulosa
La Réunion (France)
La Réunion Island
La Réunion Island introduced
ILDIS Co-ordinating Centre (2013)
India (Indian Ocean offshore islands)
Andaman Islands
Andaman Islands introduced
ILDIS Co-ordinating Centre (2013)
India (Indian Ocean offshore islands)
Nicobar Islands
Nicobar Islands introduced
ILDIS Co-ordinating Centre (2013)
Mauritius
Mautitius Islands (Mauritius and Rodrigues)
Mauritius Island introduced
ILDIS Co-ordinating Centre (2013)
Seychelles
Seychelles Islands
Seychelles Islands introduced
ILDIS Co-ordinating Centre (2013)
Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
United States (continental except west coast)
United States (other states)
United States (other states) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Georgia, Louisiana
United States (continental except west coast)
United States (other states)
USA (Florida) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)


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

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This page was created on 29 DEC 2003 and was last updated on 5 NOV 2011.