Cinnamomum camphora (L.) J.Presl, Lauraceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 7.5 (Go to the risk assessment)

Common name(s): [more details]

Chinese: zhang

English: Japanese camphor, Japanese camphortree, camphor, camphor laurel, camphor tree

French: camphre, camphrier

Japanese: kusu, kusu-no-ki, kusuno-ki

Korean: nognamu

Pohnpeian: madeu en wai

Spanish: alcanfor, alcanforero

Habit:  tree

Description:  "Evergreen large trees, up to 30 m tall, to 3 m d.b.h.; corona broadly ovate; whole plant strongly camphor-scented. Bark yellow-brown, irregularly and longitudinally fissured. Branchlets brownish, terete, glabrous. Terminal buds broadly ovoid; bud scales broadly ovate or suborbicular, sparsely sericeous outside. Leaves alternate; petiole slender, 2-3 cm, concave-convex, glabrous; leaf blade yellow-green or gray-green and glaucous abaxially, green or yellow-green and shiny adaxially, ovate-elliptic, 6-12 x  2.5-5.5 cm, subleathery, glabrous on both surfaces or sparsely puberulent abaxially only when young, triplinerved or sometimes inconspicuously 5-nerved, midrib conspicuous on both surfaces, lateral veins 1-5 (-7) pairs, basal veins with a few additional veins outside, axils of lateral veins and veins conspicuously dome-shaped and always villous abaxially, conspicuously bullate adaxially, base broadly cuneate or subrounded, margin cartilaginous, entire or sometimes undulate, apex acute. Panicle axillary, 3.5-7 cm; peduncle 2.5-4.5 cm, peduncle and rachis glabrous or gray- to yellow-brown puberulent especially on node. Pedicels 1-2 mm, glabrous. Flowers green-white or yellowish, ca. 3 mm. Perianth glabrous or puberulent outside, densely pubescent inside; perianth tube obconical, ca. 1 mm; perianth lobes elliptic, ca. 2 mm. Fertile stamens 9, ca. 2 mm; filaments pubescent. Ovary ovoid, ca. 1 mm, glabrous; style ca. 1 mm. Fruit purple-black, ovoid or subglobose, 6-8 mm in diameter; perianth cup in fruit cupuliform, ca. 5 mm, longitudinally sulcate, base ca. 1 mm wide, apex truncate and up to 4 mm wide." (Flora of China online).

Habitat/ecology:  "Rain forests, riparian habitats, bushland, wet sclerophyll forests.  The tree has an excellent adaptation to disturbed sites and easily becomes naturalized where planted.  The tree forms single-dominant stands that delay or preclude native rainforest regeneration"  (Weber, 2003; p. 107).  Develops extensive monospecific stands which prevent regeneration of native trees and shrubs.

In New Caledonia, "cette espèce introduite s'acclimate et puisse se multiplier spontanément" (Kostermans, 1974; p. 29). In Queensland, Australia, "extensive monospecific stands have developed along the banks of creeks and rivers preventing regeneration of native tree and shrub species.  It is particularly well-adapted to areas formerly covered by rainforest."  (Csurhes & Edwards, 1998; p. 100).  In the Blue Mountains, Australia, "invades moist bushland slopes and gullies, creating dense shade, competing with and taking over from native species, and continuing to inhibit their regeneration even after its removal"  (Weeds of Blue Mountains bushland).

Propagation:  Seeds dispersed by frugivorous birds and also by water. Seeds voided by birds germinate readily and remain viable for up to three years. (Csurhes & Edwards, 1998; p. 100).

Native range:  Japan (including Ryukyu Islands), Taiwan (GRIN).

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) Voucher cited: J. Pickard 3456 (NSW)
Australia (Pacific offshore islands) Norfolk Islands	Norfolk Island	introduced invasive	Orchard, Anthony E., ed. (1994) (p. 20) "On Norfolk Is. according to W.R.Sykes (Annual J. Roy. New Zealand Inst. Hort. 8: 53, 1980) it occurs in the Hundred Acre Reserve, where it 'spreads extensively from suckers' - presumably from planted trees".
Cook Islands Southern Cook Islands	Rarotonga Island	cultivated	Sykes, Bill (year unknown)
Cook Islands Southern Cook Islands	Rarotonga Island		Bishop Museum (Honolulu) (1929) (voucher ID: BISH 151356) Taxon name on voucher: Cinnamomum camphora (L.) J.Presl
Cook Islands Southern Cook Islands	Rarotonga Island		Bishop Museum (Honolulu) (1991) (voucher ID: BISH 665314) Taxon name on voucher: Cinnamomum camphora (L.) J.Presl
Cook Islands Southern Cook Islands	Rarotonga Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1985) (voucher ID: PTBG 37293) Taxon name on voucher: Cinnamomum camphora (L.) J. Presl
Federated States of Micronesia Pohnpei Islands	Pohnpei Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 80)
Federated States of Micronesia Pohnpei Islands	Pohnpei Island	introduced cultivated	Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. (2010) (p. 103)
Fiji Fiji Islands	Viti Levu Island	introduced cultivated	Smith, Albert C. (1981) (p. 122) Voucher cited: DA 8302
French Polynesia Marquesas Islands	Ua Huka (Huahuna, Uahuka) Island	introduced cultivated	Lorence, David H./Wagner, Warren L. (2013)
French Polynesia Marquesas Islands	Ua Huka (Huahuna, Uahuka) Island		National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2003) (voucher ID: PTBG 40854) Taxon name on voucher: Cinnamomum camphora
French Polynesia Society Islands	Moorea Island	introduced cultivated	Falanruw, Marjorie C./Maka, Jean E./Cole, Thomas G./Whitesell, Craig D. (1990) (pp. 146-147)
French Polynesia Society Islands	Moorea Island	introduced cultivated	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Voucher cited: J. Florence 9907 (PAP) Cultivée
French Polynesia Society Islands	Moorea Island		Bishop Museum (Honolulu) (1989) (voucher ID: BISH 601495) Taxon name on voucher: Cinnamomum camphora (L.) J.Presl
French Polynesia Society Islands	Raiatea (Havai) Island	introduced cultivated	Falanruw, Marjorie C./Maka, Jean E./Cole, Thomas G./Whitesell, Craig D. (1990) (pp. 146-147)
French Polynesia Society Islands	Tahiti Island	introduced cultivated	Welsh, S. L. (1998) (p. 132) Voucher cited: Grant 4348
French Polynesia Society Islands	Tahiti Island	introduced cultivated	Falanruw, Marjorie C./Maka, Jean E./Cole, Thomas G./Whitesell, Craig D. (1990) (pp. 146-147)
French Polynesia Society Islands	Tahiti Island	introduced cultivated	Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013) Cultivée
Guam Guam Island	Guam Island	introduced cultivated	Stone, Benjamin C. (1970) (p. 282) Rare if still present.
Guam Guam Island	Guam Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 80)
Guam Guam Island	Guam Island		Bishop Museum (Honolulu) (1954) (voucher ID: BISH 151361) Taxon name on voucher: Cinnamomum camphora (L.) J.Presl
Guam Guam Island	Guam Island		Bishop Museum (Honolulu) (1918) (voucher ID: BISH 151362) Taxon name on voucher: Cinnamomum camphora (L.) J.Presl
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 846) Occasional escape.
State of Hawaii Hawaiian Islands	Lāna‘i Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 846) Occasional escape.
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 846) Occasional escape.
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 846) Voucher cited: MacDaniels 371 (BISH) Occasional escape.
Japan (offshore islands) Ogasawara (Bonin) Islands	Bonin (Ogasawara) Islands	introduced	Kato, Hidetoshi (2007)
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced cultivated	MacKee, H. S. (1994) (p. 71) Vouchers cited: MacKee 23935, Suprin 549
New Zealand (offshore islands) Kermadec Islands	Raoul Island	introduced cultivated	Sykes, W. R. (1977) (p. 111)
New Zealand (offshore islands) Kermadec Islands	Raoul Island	introduced cultivated	Sykes, W. R./West, C. J. (1996) (p. 459) Died out naturally.

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 cultivated	Csurhes, S./Edwards, R. (1998) (p. 100)
Australia Australia (continental)	Queensland	introduced invasive cultivated	Csurhes, S./Edwards, R. (1998) (p. 100)
China China	China (People's Republic of)	introduced cultivated	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) Cultivated in valleys and on mountain slopes. South of Chang Jiang river.
China China	Hong Kong	native	Wu, Te-lin (2001) (p. 42)
Japan Japan	Japan	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan Ryukyu Islands	Ryukyu Islands	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
North Korea North Korea	North Korea (Democratic People's Republic of)	introduced cultivated	U.S. Dept. Agr., Agr. Res. Serv. (2013)
South Korea South Korea	South Korea (Republic of)	introduced cultivated	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Singapore Singapore	Singapore (Republic of)	introduced cultivated	Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 26) Cultivated only
Taiwan Taiwan Island	Taiwan Island	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
United States (west coast) United States (west coast states)	USA (California)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Vietnam Vietnam	Vietnam (Socialist Republic of)	introduced cultivated	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 cultivated	Lavergne, Christophe (2006) "Cultivé/±envahissant"
Seychelles Seychelles Islands	Seychelles Islands	introduced	Invasive Species Specialist Group (2017)

Also reported from
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
United States (continental except west coast) United States (other states)	United States (other states)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (continental except west coast) United States (other states)	USA (Florida)	introduced invasive	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)

Comments:  Planted for the fragrant wood, from which oil of camphor may be extracted. A problem species in Florida and Australia. In Queensland, it is considered to be the most important threat to the conservation of remnant native forests (Garraty, cited in Csurhes & Edwards, 1998; p. 100).

Planting of this species is prohibited in Miami-Dade County, Florida (U.S.) (Miami-Dade County Dept. of Planning and Zoning, 2010).

Control: 

Physical:  "Control of this tree on cultivated ground has relied on intensive grazing.  Seedlings can be hand removed".

Chemical:  "Cutting trees requires treating the cut stumps with herbicides because of rapid regeneration from stumps.  Young plants can be treated with 2,4-D esters and 2,4,5-T.  Larger plants can be killed by a basal bark or cut stump application of the same herbicides"  (Weber, 2003; p. 107).