Rumex crispus L., Polygonaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results: 

Reject, score: 16 (Go to the risk assessment (Australia))
Reject, score: 26 (Go to the risk assessment (U.S. (Florida)))

Common name(s): [more details]

Chinese: zhou ye suan mo

English: curled dock, curly dock, dock, sour dock, yellow dock

French: herbe patience, oseille, oseille crépu, patience, patience crépu, reguette, rumex crépu

Japanese: nagaba-gishi-gishi

Spanish: acedera crespa, acelgas, gualtata, lengua de caballo, lengua de vaca, romaza, romaza crespa, vinagrillo

Habit:  herb

Description:  "Erect, usually stout perennial herbs; stems usually solitary, 6-15 dm long, striate, glabrous to sparsely papillose-pilose. Leaves lanceolate or narrowly oblong-lanceolate, (12-) 16-60 cm long, 0.8-6 cm wide, basal ones wider, glabrous to papillose, margins strongly undulate, crisped, apex acuminate or obtuse, base cuneate to rounded, petioles 2-30 cm long.  Flowers usually perfect, usually more than 15 in open verticils, these more or less widely spaced in leafy, racemose or 1-2-branched, narrow, paniculate inflorescences, pedicels slender, recurved; outer tepals 1.2-1.5 mm long, the valves 1.8-2.2 mm long, enlarging to 3-5.5 mm long in fruit, margins subentire to denticulate or crenulate, the faces of 1 or all of the valves with a conspicuous pale brown tubercle, the tubercles variable, 1-2 mm long, the largest one extending at least " as long as the valve.  Nuts dark brown, ca. 2.2 mm long, the surface glossy"  (Wagner et al., 1999; pp. 1067, 1888).

Habitat/ecology:  "A troublesome world weed in both arable lands and pastures, but it is also an early colonizer of many disturbed areas both in lowland and upland.  It is found on roadsides and neglected lands and in lawns and home gardens; occasional plants are found in many different types of habitats and plant communities.  It is present on almost all soil types but less often on peat and rarely on acid soils. It tends to avoid equatorial areas, but it is a weed in the valleys and high places in those regions" (Holm et al., 1977; p. 403).

In Hawai‘i, "naturalized primarily in disturbed areas such as along roadsides and near developed area, 6-1,850 m" (Wagner et al., 1999; p. 1067).  In Fiji, "an occasional weedy herb in gardens and along roadsides near sea level" (Smith, 1981; pp. 305-306). In New Guinea, "a troublesome weed of cultivation and grazing land, well-known in temperate countries" (Henty & Pritchard, 1975; p. 141); "a weed of pastures and cultivation; in Papuasia at altitudes of c. 1700 m"  (Womersley, 1978; p. 248). In New Zealand, "widespread and often abundant weed in all but montane regions. Mostly damp places such as lakesides, river beds, ditches, swamps, moist dune slacks near the coast, and wet pastures, sometimes drier ground in waste places, pastures and other modified habitats" (Webb et al., 1988; p. 983).

Propagation:  Seed. "The seeds will pass through the digestive tracts of birds and cattle without being harmed.  The fruits...are lightweight and may be moved long distances by wind.  They are also spread by moving in water and by adhering with mud to the clothes of man, his machinery, and the fur, feathers, and feet of animals" (Holm et al., 1977; p. 405).

Native range:  Europe.

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia (Pacific offshore islands) Lord Howe Island	Lord Howe Island	introduced	Pickard, J. (1984) (p. 207)
Australia (Pacific offshore islands) Lord Howe Island	Lord Howe Island	introduced invasive	Orchard, Anthony E., ed. (1994) (p. 20) "An introduced weed". Voucher cited: A.C. Beauglehole 5514 (MEL)
Chile (offshore islands) Juan Fernández Islands	Isla Más a Tierra (Robinson Crusoe Island)	introduced	Skottsberg, Carl (1953) (p. 216)
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. 557)
Chile (offshore islands) Juan Fernández Islands	Isla Más Afuera (Alejandro Selkirk Island)	introduced	Skottsberg, Carl (1953) (p. 216)
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. 557)
Chile (offshore islands) Juan Fernández Islands	Isla Santa Clara	introduced	Skottsberg, Carl (1953) (p. 216)
Chile (offshore islands) Juan Fernández Islands	Isla Santa Clara	introduced invasive	Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands) Juan Fernández Islands	Isla Santa Clara	introduced invasive	Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 557)
Ecuador (Galápagos Islands) Isabela Group	Isabela Island	introduced invasive	Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands) Isabela Group	Volcán Sierra Negra, Isabela Island	introduced invasive	Charles Darwin Foundation (2008)
Fiji Fiji Islands	Viti Levu Island	introduced invasive	Smith, Albert C. (1981) (pp. 305-306) Voucher cited: DA L.16742
French Polynesia Austral (Tubuai) Islands	Rapa Island	introduced invasive	Florence, J. (2004) (pp. 338-339)
French Polynesia Austral (Tubuai) Islands	Rapa Island	introduced invasive	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Vouchers cited: J. Florence 6287 (PAP), N. Hallé 7389 (PAP) Naturalisée
State of Hawaii Hawaiian Islands	Hawai‘i (Big) Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1067)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1067, 1888)
State of Hawaii Hawaiian Islands	Lāna‘i Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1067, 1888)
State of Hawaii Hawaiian Islands	Lāna‘i Island	introduced invasive	Mosyakin, Sergei/Wagner, Warren L. (1998) (pp. 39-44) subsp. fauriei (Rech.) Mosyakin & W.L. Wagner; vouchers cited: G.C. Munro 284 (BISH), G.C. Munro 309 (BISH), G.C. Munro 502 (BISH)
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1067, 1888) Voucher cited: Forbes 265.M (BISH)
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1067, 1888)
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive	Mosyakin, Sergei/Wagner, Warren L. (1998) (pp. 39-44) subsp. fauriei (Rech.) Mosyakin & W.L. Wagner; voucher cited: G. Staples & A. Kadowaki 892 (BISH)
New Caledonia New Caledonia	New Caledonia Islands		Swarbrick, John T. (1997) (p. 96)
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. 117) Vouchers cited: Baumann 15654, Schmid 751 (NOU), MacKee 15841, MacKee 16021
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. 141) Eastern highlands dist., at about 1700 m.
Papua New Guinea Papua New Guinea (eastern New Guinea Island)	Papua New Guinea (eastern New Guinea Island)	introduced invasive	Womersley, John S., ed. (1978) (p. 248)
Philippines Philippine Islands	Philippine Islands		Hafliger, Toni J./Wolf, Matthias (1988) (p. 307)
Philippines Philippine Islands	Philippine Islands	introduced invasive	Merrill, Elmer D. (1923) (p. 121) In Benguet a recent introduction, but sparingly naturalized, altitude 1,400 to 2,200 m.

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)		Hafliger, Toni J./Wolf, Matthias (1988) (p. 307)
Australia Australia (continental)	Queensland	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (p. 404)
Central America Central America (Pacific rim)	Costa Rica (Republic of)		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 314)
Central America Central America (Pacific rim)	Guatemala (Republic of)	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (pp. 404, 407)
China China	China (People's Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Indonesia Indonesia	Indonesia (Republic of)		Hafliger, Toni J./Wolf, Matthias (1988) (p. 307)
Japan Japan	Japan	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan Japan	Japan	introduced	Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 181)
North Korea North Korea	North Korea (Democratic People's Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
South Korea South Korea	South Korea (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Mexico Mexico	Mexico (United Mexican States)	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (p. 404)
New Zealand New Zealand	New Zealand (country)	introduced invasive	Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 983)
South America (Pacific rim) South America (Pacific rim)	Chile (Republic of)	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (p. 404)
South America (Pacific rim) South America (Pacific rim)	Colombia	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (p. 404)
South America (Pacific rim) South America (Pacific rim)	Ecuador (Republic of) (continental)	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (p. 404)
South America (Pacific rim) South America (Pacific rim)	Perú (Republic of)	introduced invasive	Holm, Leroy G./Plucknett, D. L./Pancho, J. V./Herberger, J. P. (1977) (p. 404)
Taiwan Taiwan Island	Taiwan Island	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Thailand Thailand	Thailand (Kingdom of)	native	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
La Réunion (France) La Réunion Island	La Réunion Island	introduced invasive	MacDonald, I. A. W./Thebaud, C./Strahm, W. A./Strasberg, D. (1991) (pp. 51-61)
La Réunion (France) La Réunion Island	La Réunion Island	introduced invasive	Lavergne, Christophe (2006) "Naturalisé/±envahissant"
Mauritius Mautitius Islands (Mauritius and Rodrigues)	Mauritius Island		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 314)

Control: 

Physical:  "Single plants or small groups can be dug out or deeply hoed.  To prevent regrowth, the roots must be severed at least 20 cm below the soil surface".

Chemical:  "Effective herbicides include glyphosate, dicamba, picloram, or triclopyr"  (Weber, 2003; p. 376).