Argemone mexicana L., Papaveraceae

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Present on Pacific Islands?  yes

Threat only at high elevations?  no

Risk assessment results:  Reject, score: 18 (Go to the risk assessment)

Common name(s): [more details]

English: goatweed, Mexican poppy, Mexican prickly-poppy, Mexican thistle, prickly poppy, yellow thistle

French: argémone du Mexique, argémone Mexicaine, chardon béni, chardon du pays, herbe à femme, pavot épineux

Japanese: azamigeshi

Spanish: adormidera espinosa, amapolo pinchuda, cardo amarillo, cardo blanco, cardo santo, chicalote

Habit:  herb

Description:  "Coarse erect herbs with milk sap and prickly stems and leaves; leaves somewhat irregularly pinnatilobed and serrate, glaucous, the edges crisped-undulate, each tooth spinose; flowers sessile, yellow, showy, up to 6 cm broad."  (Stone, 1970)"Annual herbs; stems 2.5-10 dm long, branched, sparsely to moderately covered with prickles.  Leaves glaucous, oblong-oblanceolate, pinnately lobed, 1/2-3/4 to midrib, both surfaces sparsely covered with prickles along veins, margins somewhat sinuate-dentate, the teeth tipped with a prickle, sessile, upper ones usually somewhat clasping the stem.  Buds subglobose, 1.2-1.6 cm long, sparsely prickly; sepal horns terete, 5-10 mm long; petals bright yellow, 1.7-3 cm long; stamens 30-50; ovary 4-6-carpellate.  Capsules oblong to broadly ellipsoid, 3-4.2 cm long, each valve with 9-15 prickles, the longest one 7-10 mm long.  Seeds numerous, 1.2-1.5 mm in diameter"  (Wagner et al, 1999; pp. 1005-1006).

Habitat/ecology:  "Adapted to a very wide range of habitats.  In Mauritius it is most plentiful in the subhumid regions, whereas in Puerto Rico it is most prevalent in the semiarid northern regions.  Though often seen at sea level, it is a weed at an elevation of 2,900 m in Tanzania.  It is found on many soil types, on cultivated ground, in pastures, in fence rows, on stony ridges, along roads, in waste places, and on bare soil.  It seems to prefer moist sites, growing freely along rivers in Australia and following sandy riverbeds in southern Africa" (Holm et al., 1977; p. 176).

In Hawai‘i, "naturalized in dry, disturbed habitats" (Wagner et al, 1999; pp. 1005-1006).  In Fiji, "occasionally naturalized as a weed in sandy soil and in cane fields near sea level" (Smith, 1981; p. 154). In New Caledonia, "mauvaise herbe largement répandue et parfois abondante" (MacKee, 1994; p. 112).

Propagation:  Seed

Native range:  Mexico and the West Indies (Stone, 1970; p. 286).

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	Tinian Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 81)
Ecuador (Galápagos Islands) San Cristóbal Group	San Cristóbal Island	introduced invasive cultivated	Charles Darwin Research Station (2005)
Fiji Fiji Islands	Viti Levu Island	introduced invasive	Smith, Albert C. (1981) (p. 154) Vouchers cited: DA 9625, DA 10318, DA 11158, DA 11177
Guam Guam Island	Guam Island	introduced cultivated	Stone, Benjamin C. (1970) (p. 286) Voucher cited: Stone 4160 (GUAM) Naturalized
Guam Guam Island	Guam Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 81)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1005)
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1005)
State of Hawaii Hawaiian Islands	Moloka‘i Island	introduced invasive	Wydong, Michael/Hughes, Guy/Wood, K. R. (2007) (p. 6) Voucher cited: B. Barnett s.n. (BISH 718652)
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1005)
New Caledonia Îles Loyauté (Loyalte Islands)	Îles Loyauté (Loyalty Islands)	introduced invasive	Tassin, Jacques (2005)
New Caledonia Îles Loyauté (Loyalte Islands)	Île Lifou	introduced invasive	MacKee, H. S. (1994) (pp. 112-113) Vouchers cited: Sarasin 731 (Z), MacKee 28298
New Caledonia Îles Loyauté (Loyalte Islands)	Île Walpole	introduced invasive	MacKee, H. S. (1994) (pp. 112-113) Voucher cited: Cherrier in MacKee 44042
New Caledonia New Caledonia	New Caledonia Islands	introduced invasive	Gargominy, Oliver/Bouchet, Philipe/Pascal, Michel/Jaffre, Tanguy/Tourneu, Jean-Christophe (1996) (p. 382) Mauvaise herbe largement répandue et parfois abondante.
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced invasive	Tassin, Jacques (2005)
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced invasive	MacKee, H. S. (1994) (pp. 112-113) Vouchers cited: Pennel 149, Pennel 370, Däniker 140 (Z), MacDaniels 2026, MacKee 5681, MacKee 11872, MacKee 35899; var. ochroleuca (Sweet) Lindl., vouchers cited: MacKee 15890, MacKee 40853
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 invasive	MacKee, H. S. (1994) (pp. 112-113) Voucher cited: Baumann 13565
Niue Niue	Niue Island	introduced invasive	Sykes, W. R. (1970) (p. 144) See comments below. Voucher cited: CHR 168709
Palau Palau (main island group)	Palau Islands (main island group)		Swarbrick, John T. (1997) (p. 88)
Philippines Philippine Islands	Philippine Islands		Hafliger, Toni J./Wolf, Matthias (1988) (p. 78)
Samoa Western Samoa Islands	Western Samoa Islands	introduced invasive	Smith, Albert C. (1981) (p. 154)
Vanuatu New Hebrides Islands	Vanuatu (Republic of)		Swarbrick, John T. (1997) (p. 88)

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	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (pp. 178-179)
Australia Australia (continental)	Queensland	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (pp. 178-179)
Chile (continental) Chile	Chile (Republic of)		Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (pp. 178-179)
China China	China (People's Republic of)		Hafliger, Toni J./Wolf, Matthias (1988) (p. 78)
Colombia Colombia	Colombia (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Colombia Colombia	Colombia (Republic of)		Hafliger, Toni J./Wolf, Matthias (1988) (p. 80)
Costa Rica Costa Rica	Costa Rica (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Ecuador (Mainland) Ecuador	Ecuador (Republic of) (continental)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
El Salvador El Salvador	El Salvador (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
El Salvador El Salvador	El Salvador (Republic of)		Hafliger, Toni J./Wolf, Matthias (1988) (p. 80)
Guatemala Guatemala	Guatemala (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Honduras Honduras	Honduras (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Indonesia Indonesia	Indonesia (Republic of)	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (pp. 178-179)
Japan Japan	Japan (country)		Hafliger, Toni J./Wolf, Matthias (1988) (p. 80)
Mexico Mexico	Mexico (United Mexican States)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Nicaragua Nicaragua	Nicaragua (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Panama Panama	Panama (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Perú Perú	Perú (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Thailand Thailand	Thailand (Kingdom of)		Hafliger, Toni J./Wolf, Matthias (1988) (p. 80)

Indian Ocean
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
La Réunion (France) La Réunion Island	La Réunion Island		Hafliger, Toni J./Wolf, Matthias (1988) (p. 80)
Mauritius Mautitius Islands (Mauritius and Rodrigues)	Mauritius Island	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (pp. 178-179)

Comments:  Reported present by Sykes, 1970, p. 144, and proposed for eradication at that time. Current status not known although Whistler (1988) reports "rare on Niue, possibly now eradicated, not seen by the author".

Additional information:  Additional online information about Argemone mexicana is available from the Hawaiian Ecosystems at Risk project (HEAR).

Taxonomic information about Argemone mexicana may be available from the Germplasm Resources Information Network (GRIN).

References:

Charles Darwin Research Station. 2005. CDRS Herbarium records.

Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce. 1979. A geographical checklist of the Micronesian dicotyledonae. Micronesica 15:1-295.

Gargominy, Oliver/Bouchet, Philipe/Pascal, Michel/Jaffre, Tanguy/Tourneu, Jean-Christophe. 1996. Conséquences des introductions d'espèces animales et végétales sur la biodiversité en Nouvelle-Calédonie. Rev. Ecol. (Terre Vie) 51:375-401.

Hafliger, Toni J./Wolf, Matthias. 1988. Dicot weeds, vol. 1. CIBA-GEIGY Ltd., Basle, Switzerland. 335 pp.

Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. 1977. The world’s worst weeds: distribution and biology. East-West Center/University Press of Hawaii. 609 pp.

MacKee, H. S. 1994. Catalogue des plantes introduites et cultivées en Nouvelle-Calédonie. Muséum National d'Histoire Naturelle, Paris, 164 p.

Smith, Albert C. 1981. Flora Vitiensis nova: a new flora of Fiji. National Tropical Botanical Garden, Lawai, Kauai, Hawaii. Volume 2. 810 pp.

Stone, Benjamin C. 1970. The flora of Guam. Micronesica 6:1-659.

Swarbrick, John T. 1997. Weeds of the Pacific Islands. Technical paper no. 209. South Pacific Commission, Noumea, New Caledonia. 124 pp.

Sykes, W. R. 1970. Contributions to the flora of Niue. New Zealand Department of Scientific and Industrial Research Bulletin 200, Wellington. 321 pp.

Tassin, Jacques. 2005. Jacques Tassin (IAC-CIRAD), personal communication.

U.S. Dept. Agr., Agr. Res. Serv. 2007. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.

Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. 1999. Manual of the flowering plants of Hawaii. Revised edition. Bernice P. Bishop Museum special publication. University of Hawai‘i Press/Bishop Museum Press, Honolulu. 1919 pp. (two volumes).

Whistler, W. A. 1988. Checklist of the weed flora of western Polynesia. Technical Paper No. 194, South Pacific Commission, Noumea, New Caledonia. 69 pp.

Wiggins, I. L./Porter, D. M. 1971. Flora of the Galapágos Islands. Stanford University Press. 998 pp.

Wydong, Michael/Hughes, Guy/Wood, K. R. 2007. New Hawaiian plant records for the island of Moloka‘i. In: Evenhuis, Neal L. and Eldredge, Lucias G., eds. Records of the Hawaii Biological Survey for 2006. Part 2: Notes. Bishop Museum Occasional Papers 96:1-8.