Pacific Island Ecosystems at Risk (PIER)

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Corynocarpus laevigatus
J.R.Forst. & G.Forst., Corynocarpaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 9 (Go to the risk assessment)

Common name(s): [more details]

English: karaka, karakara nut, New Zealand laurel

Habit:  tree

Description:  "Trees 3-15 m tall; branches stout.  Leaves dark green, glossy, thick, coriaceous, elliptic to oblong-obovate, (5-) 10-15 (-20) cm long, (3-) 5-7 cm wide, margins slightly revolute, petioles 1-2 cm long.  Flowers in stout, stiff panicles usually 15-20 cm long; sepals suborbicular, ca. 3 mm long; petals greenish yellow, obovate, ca. 5 mm long, margins minutely toothed; staminodes spatulate, minutely toothed.  Drupes orange, ellipsoid to ovoid, 2.5-4 cm long"  (Wagner et al., 1999; p. 566).

Habitat/ecology:  "It forms a dense shade excluding other species.  It grows in mesic habitats between 700-1,500 m in Hawai‘i" (Smith, 1985; p. 189).

Propagation:  Seed (poisonous to man) distributed by frugivorous birds and pigs.

Native range:  New Zealand; cultivated and naturalized elsewhere (GRIN).

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
Hawai‘i (Big) Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 566)
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 566)
State of Hawaii
Hawaiian Islands
Moloka‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 566)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 566)
New Zealand (offshore islands)
Kermadec Islands
Kermadec Islands native
Allan, H. H. (1982) (p. 457)
"Coastal and lowland forest".
New Zealand (offshore islands)
Kermadec Islands
Raoul Island native
Sykes, W. R. (1977) (p. 101)
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) native
Allan, H. H. (1982) (p. 457)
"Coastal and lowland forest".

Control: 

Chemical: "Sensitive to cut-surface (notching) applications of glyphosate. Triclopyr, dicamba and 2,4-D a little less effective so may require closer spacing of notches. Basal bark application of imazapyr effective.  Thinline application of Pathfinder® II in vertical streaks effective" (Motooka et al., 2003).


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This page was created on 1 JAN 1999 and was last updated on 16 MAR 2013.