Impatiens hawkeri W. Bull, Balsaminaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 8 (Go to the risk assessment)

Other Latin names:  Impatiens herzogii K. Schum.; Impatiens linearifolia Warb.; Impatiens schlechteri Warb.

Common name(s): [more details]

English: New Guinea impatiens

Habit:  herb

Description:  "Herb 18-36 inches tall.  Leaves in whorls of 3-7; petioles 0.5-2.5 inches long; blades lanceolate, elliptic, or oblanceolate, usually 2-4 x 0.75-1.33 inches, green, red, bronze, purplish or variously variegated, base ± wedge-shaped, margins shallowly toothed, apex pointed. Flowers solitary; peduncle absent, pedicels 1.5-5 inches long; lateral sepals tailed, corolla ± flat, 1.25-2 inches in diameter, red, orange, magenta, white, pink, or purple, petal apexes grooved to ± deeply notched, spur curved, 1.25-2.5 inches long; ovary glabrous.  Fruit spindle-shaped, 0.7-1.33 inches long, glabrous"  (Staples & Herbst, 2005; p 172).

Habitat/ecology:  In Hawaii, both lower, warmer elevations and in cooler uplands (Staples & Herbst, 2005; p. 172).

Propagation:  Seed

Native range:  Papua New Guinea and the Solomon Islands; also cultivated (GRIN).  New Guinea, the Solomon Islands and New Ireland (Staples & Herbst, 2005; p. 172).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
State of Hawaii Hawaiian Islands	Hawaiian Islands	introduced cultivated	Staples, George W./Herbst, Derral R. (2005) (p. 172)
New Guinea (Indonesia and Papua New Guinea) New Guinea Island	New Guinea Island	native	Staples, George W./Herbst, Derral R. (2005) (p. 172)
Papua New Guinea Bismarck Archipelago	New Ireland Island	native	Staples, George W./Herbst, Derral R. (2005) (p. 172)
Papua New Guinea Papua New Guinea (eastern New Guinea Island)	Papua New Guinea (eastern New Guinea Island)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Solomon Islands Solomon Islands	Solomon Islands	native	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	Randall, R. P. (2007) (p. 256)

Control:  If you know of control methods for Impatiens hawkeri, please let us know.