Tropaeolum majus L., Tropaeolaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  yes

Common name(s): [more details]

English: Indian cress, garden nasturtium, nasturtium

French: cresson d'Inde, grande capucine

Hawaiian: pohe haole

Spanish: capuchina, mastuerzo

Habit:  herb

Description:  "Glabrous, somewhat succulent annual or short-lived perennial herbs; stems usually climbing.  Leaves peltate, orbicular or more or less angled, 4-15 cm wide, ca. 9-nerved, lower surface papillose, margins entire to undulate, petioles 10-30 cm long or sometimes more.  Flowers yellow, orange, reddish orange, or red, sometimes striped and spotted, 2.5-6 cm long, spur 2.5-3 cm long, straight or curved, the lower petals deeply fringed on the claw, apex of plants usually rounded"  (Wagner et al., 1999; p. 1295).

Habitat/ecology:  In Hawai‘i, "often cultivated and now naturalized in mesic, disturbed areas, 850-1,350 m" (Wagner et al., 1999; p. 1295).  "Disturbed sites especially adjacent to gardens and dumps, Shrubland, herbfield, wetland, and streamsides. Tolerates salt, wind, hot to cold, semi-shade, damp, damage, and poor soil. Smothers low-growing habitats and prevents the establishment of native plant seedlings"  (Weedbusters New Zealand).  "In Chile this species grows in the following environmental conditions:  coastal mountains, 500-2000 m; coastal areas, 0-500 m.  Somewhat dry areas where the drought may last 3-5 months, precipitations of 400-800 mm. are concentrated in winter; humid areas, with almost constant rainfall, short dry periods are possible (generally not longer than 1 month).  Fully exposed to the sun, level areas or slopes facing north; some shadow, some protection against direct sunlight, some shadow from vegetation, filtering about 20-40% of light"  (Chileflora).

Propagation:  Seed

Native range:  "Native to the Andes of South America" (Wagner et al., 1999; p. 1295).

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. 208)
Australia (Pacific offshore islands) Lord Howe Island	Lord Howe Island	introduced invasive cultivated	Orchard, Anthony E., ed. (1994) (p. 21) "A garden escape, now naturalised in a few places". Vouchers cited: J. Pickard 2692 (NSW), J. Pickard 1213 (NSW)
Chile (offshore islands) Juan Fernández Islands	Isla Más a Tierra (Robinson Crusoe Island)	introduced invasive cultivated	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) (pp. 462, 466, 558)
Chile (offshore islands) Juan Fernández Islands	Isla Más Afuera (Alejandro Selkirk Island)	introduced invasive cultivated	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) (pp. 462, 466, 558)
Ecuador (Galápagos Islands) Isabela Group	Isabela Island	introduced invasive cultivated	Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands) Isabela Group	Volcán Sierra Negra, Isabela Island	introduced cultivated	Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands) San Cristóbal Group	San Cristóbal Island	introduced invasive cultivated	Charles Darwin Foundation (2008) Observed in survey, no herbarium record.
Ecuador (Galápagos Islands) Santa Cruz Group	Santa Cruz Island	introduced invasive cultivated	Charles Darwin Foundation (2008)
French Polynesia Society Islands	Tahiti Island	introduced cultivated	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Cultivée
French Polynesia Austral (Tubuai) Islands	Raivavae (Raevavae) Island	introduced cultivated	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Cultivée
French Polynesia Austral (Tubuai) Islands	Rapa Island	introduced cultivated	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Cultivée
French Polynesia Austral (Tubuai) Islands	Rurutu Island	introduced cultivated	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Cultivée
French Polynesia Austral (Tubuai) Islands	Tubuai Island	introduced cultivated	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Cultivée
State of Hawaii Hawaiian Islands	Hawai‘i (Big) Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1295)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1295)
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1295)
State of Hawaii Hawaiian Islands	Moloka‘i Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1295)
Marshall Islands Ralik Chain	Kwajalein (Kuwajleen) Atoll	introduced cultivated	Whistler, W. A./Steele, O. (1999) (p. 103)
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced cultivated	MacKee, H. S. (1994) (p. 135) Vouchers cited: Baumann 6111, MacKee 20609
New Zealand (offshore islands) Kermadec Islands	Raoul Island	introduced invasive cultivated	Sykes, W. R. (1977) (p. 146)
New Zealand (offshore islands) Kermadec Islands	Raoul Island	introduced invasive cultivated	Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 1259) "occasional. Waysides and waste places, especially moist and shady situations".
Niue Niue	Niue Island	introduced cultivated	Yuncker, T. G. (1943) (p. 67) Not seen by Sykes (1970) in 1965.

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
New Zealand New Zealand	New Zealand (country)	introduced invasive	Owen, S. J. (1997)
New Zealand New Zealand	New Zealand (country)	introduced invasive cultivated	Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 1259) "Waysides and waste places, especially moist and shady situations, also river banks and other waterways in built-up areas, and around many gardens and parks".
South America (Pacific rim) South America (Pacific rim)	Chile (Republic of)	introduced cultivated	Belov, Michail (2013)

Indian Ocean
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Seychelles Seychelles Islands	Seychelles Islands	introduced	Invasive Species Specialist Group (2017)

Control:  "Easy to control.

Physical:  Pull up all vegetation (all year round). Dispose of at a refuse transfer station or burn or bury deeply.

Chemical:  Spray (spring-summer): glyphosate (10ml/L + penetrant)"  (Weedbusters New Zealand).