Pinus elliottii Engl., Pinaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  Evaluate, score: 2 (Go to the risk assessment)

Common name(s): [more details]

Chinese: shi di song

English: slash pine, swamp pine

Habit:  tree

Description:  "Trees to 30 m; trunk to 0.8 m diam., straight to contorted; crown conic, becoming rounded or flattened. Bark orange- to purple-brown, irregularly furrowed and cross-checked into large, irregularly rectangular, papery-scaly plates. Branches spreading to ascending; twigs stout (to ca. 1 cm thick), orange-brown, aging darker brown, rough-scaly. Buds cylindric, silvery brown, 1.5-2 cm; scale margins fringed. Leaves 2 or 3 per fascicle, spreading or ascending, persisting ca. 2 years, 15-20 (23) cm x 1.2-1.5 mm, straight, slightly twisted, pliant, yellow- to blue-green, all surfaces with stomatal lines, margins finely serrulate, apex abruptly acute to acuminate; sheath 1-2 cm, base persistent. Pollen cones cylindric, 30-40 mm, purplish. Seed cones maturing in 2 years, falling the year after seed-shed, single or in pairs, symmetric, lance-ovoid before opening, ovoid or ovoid-cylindric when open, (7-)9-18(-20) cm, light chocolate brown, on stalks to 3 cm; apophyses lustrous (as if varnished), slightly raised, strongly cross-keeled; umbo central, depressed-pyramidal, with short, stout prickle. Seeds ellipsoid, oblique-tipped; body 6-7mm, dark brown; wing to 20mm" (Kral, 1993).

Habitat/ecology:  Introduced as a timber species in subtropical and warm temperate areas worldwide.  "Grass- and heathland, scrub.  In the native range, this tree plrefers relatively moist soils.  The fast growing tree establishes dense stands that shade out native plants and prevent their regeneration.  Invaded grasslands are transformed over time into species poor shrubs and forests"  (Weber, 2003; p. 325).

Propagation:  Seed

Native range:  Southeastern United States

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Fiji Fiji Islands	Fiji Islands	introduced cultivated	Smith, Albert C. (1979) (p. 116)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced	Wester, Lyndon (1992) (p. 116)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive cultivated	Frohlich, Danielle/Lau, Alex (2012) (p. 43) Voucher cited: D. Lorence & T. Flynn 9515 (BISH)
State of Hawaii Hawaiian Islands	Moloka‘i Island	introduced invasive cultivated	Wysong, Michael/Hughes, Guy/Wood, K. R. (2007) (p. 6) Voucher cited: Wysong 480 (BISH). "Infrequently seen naturalizing into the mixed mesic native forest zone below the original plantings".
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive cultivated	Frohlich, Danielle/Lau, Alex (2012) (p. 43) Voucher cited: A. Lau 2008061201 (BISH)
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced cultivated	MacKee, H. S. (1994) (p. 65) Voucher cited: MacKee 40484
New Caledonia New Caledonia Archipelago	Île des Pins (Isle of Pines)	introduced cultivated	MacKee, H. S. (1994) (p. 65) Voucher cited: Cherrier in MacKee 40593

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	Australian Biological Resources Study (2013) "Sporadically naturalised around plantations".
Australia Australia (continental)	Australia (continental)	introduced invasive	Weber, Ewald (2003) (p. 325)
Australia Australia (continental)	Queensland	introduced invasive cultivated	Australian Biological Resources Study (2013) "Sporadically naturalised around plantations".
China China	China (People's Republic of)	introduced cultivated	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
China China	Hong Kong	introduced cultivated	Wu, Te-lin (2001) (p. 33)
Singapore Singapore	Singapore (Republic of)	introduced cultivated	Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 70) Cultivated only

Also reported from
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
South Africa South Africa	South Africa (Republic of)	introduced	U.S. Dept. Agr., Agr. Res. Serv. (2013)

Control: 

Physical:  Hand pull or dig out seedlings and young trees, cut larger trees (Weber, 2003; p. 325).