Pacific Island Ecosystems at Risk (PIER)

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Datura ferox
L., Solanaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  Reject, score: 21 (Go to the risk assessment)

Common name(s): [more details]

English: angel's-trumpets, false castor-oil, fierce thorn-apple, large thorn-apple, long-spine thorn-apple, long-spur thorn-apple

Habit:  herb

Description:  "Stout annual herb, glabrous or sparsely pubescent with non-glandular hairs.  Mature leaves from broadly-ovate and somewhat angular to rounded-triangular, the lamina up to 14 cm long and 16 cm wide, with a few shallow usually toothed or sinuate lobes.  Calyx to 3.5 cm long, 5-lobed, the lobes 4-7 mm long.  Corolla 4-6 cm long, white, 5-lobed, the lobes ending in a point 1-2 mm long.  Stamens not exserted; anthers 3-4 mm long.  Style c. 3 cm long; stigma below anthers. Capsule ellipsoid or nearly so, to 4 cm long, erect, spiny; spines usually 40-60, stout, conical, sharp, usually longer near capsule summit, the longest at least half length of capsule; persistent base of calyx to 8 mm long. Seeds 4-5 mm long, black or grey"  (George, 1982; pp. 182-183).

"Herbacée à arbrisseau annuel atteignant 1,5 m de hauteur, reconnaissable à ses grandes fleurs solitaires de couleur blanchâtre et ses fruits secs (capsules) à grandes épines" (Meyer, 2008; p. 31).

Habitat/ecology:  In Australia, "a weed of waste ground and disturbed areas in agricultural and pastoral districts; often a serious weed of summer grain crops in Queensland and New South Wales" (George, 1982; pp. 182-183).

Propagation:  Seed

Native range:  "Native to China but now widely distributed in warm regions of the world"  (George, 1982; pp. 182-183).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Chile (offshore islands)
Rapa Nui (Easter) Island
Rapa Nui (Easter) Island (Isla de Pasqua) introduced
invasive
cultivated
Meyer, Jean-Yves (2008) (pp. 31, 42)
"Nous avons observé un bosquet d’individus épars en bordure de piste entre Tahai et Ahu Tepeu, poussant sur un monticule de gravats et de terre" (Meyer, 2008; p. 31).
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
Tassin, Jacques (2005)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
MacKee, H. S. (1994) (p. 130)
Voucher cited: MacKee 39048
Spontané
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)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 120)
Chile (continental)
Chile
Chile (Republic of)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 120)
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 188)
New Zealand
New Zealand
New Zealand (country) introduced
invasive
cultivated
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 1124)
"In and near gardens, uncommon with some occurrences originating from imported birdseed".

Control:  "L’arrachage manuel des plants et éventuellement la lutte chimique par pulvérisation d’un herbicide sur les tiges et les feuilles (à base de glyphosate) sont réalisables" (Meyer, 2008; p. 31).


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This page was created on 22 SEP 2002 and was last updated on 4 APR 2009.