Pacific Island Ecosystems at Risk (PIER)

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Cestrum elegans
(Brongn. ex Neumann) Schlecht., Solanaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 18 (Go to the risk assessment)

Other Latin names:  Cestrum purpureum (Lindl.) Standl.; Habrothamnus elegans Brongn. ex Neumann; Habrothamnus purpureus Lindl.

Common name(s): [more details]

Chinese: mao jing ye xiang shu

English: crimson cestrum, purple cestrum

Habit:  shrub

Description:  "Shrubs. Stem copiously pubescent. Petiole 6-12 mm; leaf blade ovate or elliptic, ca. 8 x 3 cm. Inflorescences erect, terminal or axillary, congested racemose panicles; bracts ovate, minutely tomentose, 4-5 mm. Flowers odorless. Pedicel ca. 1 mm. Calyx narrowly campanulate, 6-8 mm, glabrous, unribbed; teeth ca. 3 mm, ciliate. Corolla red, pink, or violet, ca. 2 cm, expanded upward, abruptly contracted at throat, glabrous; lobes deltoid, ca. 2 mm. Filaments glabrous, unappendaged, slightly bent at point of insertion. Fruiting calyx not splitting. Berry dark pink, globose, 0.8-1.3 cm. Seeds ca. 8"  (Flora of China online).

Habitat/ecology:  "Disturbed and open forest and margins, streamsides, shrublands, and dry gullies.  Forms dense, shady masses. Moderate to highly shade tolerant, and grows in most soil types, damp or dry conditions, and hot or cold temperatures. Poisonous, not grazed.  Prevents the establishment of native plant seedlings. Poisonous berries and rotting vegetation may affect native fauna"  (Weedbusters New Zealand).

Propagation:  Seeds and cuttings (Csurhes & Edwards, 1998; p. 99).  "Birds, flooding, soil movement and vegetation dumping all spread seeds"  (Weedbusters New Zealand).

Native range:  Mexico (Staples & Herbst, 2005; p. 533).

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   Bishop Museum (U.S.A. Hawaii. Honolulu.) (1930) (voucher ID: BISH 69681)
Taxon name on voucher: Cestrum elegans (Brongn. ex Neumann) Schlecht.
State of Hawaii
Hawaiian Islands
Hawaiian Islands introduced
cultivated
Staples, George W./Herbst, Derral R. (2005) (p. 533)
State of Hawaii
Hawaiian Islands
Kaua‘i Island   Bishop Museum (U.S.A. Hawaii. Honolulu.) (1995) (voucher ID: BISH 646222)
Taxon name on voucher: Cestrum elegans (Brongn. ex Neumann) Schlecht.
State of Hawaii
Hawaiian Islands
O‘ahu Island   Bishop Museum (U.S.A. Hawaii. Honolulu.) (1937) (voucher ID: BISH 69682)
Taxon name on voucher: Cestrum elegans (Brongn. ex Neumann) Schlecht.
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
cultivated
MacKee, H. S. (1994) (p. 130)
Vouchers cited: Baumann 7421 s. loc., Cochereau in Veillon 2037, MacKee 21757
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) introduced
invasive
Csurhes, S./Edwards, R. (1998) (p. 99)
"Invasive in moist and wet sclerophyll forests in Victoria".
Mexico
Mexico
Mexico (United Mexican States) native
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. 25)
Cultivated only

Control: 

Physical:  "Best controlled when in flower. Wear gloves when handling.  Pull out small plants (all year round)"

Chemical:  "Stump swab (all year round): Tordon Brushkiller (100ml/L) or triclopyr 600 EC (100ml/L); spray (spring-summer): triclopyr 600 EC (30ml/10L)"  (Weedbusters New Zealand).


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

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This page was created on 8 DEC 2009 and was last updated on 31 DEC 2011.