Pacific Island Ecosystems at Risk (PIER)

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Helianthus argophyllus
Torr. & A. Gray, Asteraceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  Accept, score: 3 (Go to the risk assessment).

Common name(s): [more details]

English: silverleaf sunflower

Tongan: siola‘ā

Habit:  herb

Description:  "Coarse annual herb 1.5-2 m high...; stems densely white-tomentose to -floccose; leaf blades ovate to ovate-lanceolate, 15-25 cm long and nearly as broad, densely white-lanate-sericeous with long silky hairs; ray flowers 15 or more, 2.5-3.5 cm long, yellow to orange-yellow; disk flowers usually deep purple; achenes 4-6 mm long" (Smith, 1991; pp. 278-279).

Habitat/ecology:  "Well-drained soils in sunny places are preferred" (Whistler, 2000; p. 242).

Propagation:  Seed

Native range:  North America (Smith, 1991; pp. 278-279).

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
Viti Levu Island introduced
cultivated
Smith, Albert C. (1991) (pp. 278-279)
Voucher cited: DA 12354
Japan (offshore islands)
Ogasawara (Bonin) Islands
Bonin (Ogasawara) Islands introduced
Kato, Hidetoshi (2007)
Tonga
Tonga Islands
Tonga Islands introduced
invasive
Swarbrick, John T. (1997) (p. 92)
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)
Queensland introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 190)
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) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
North Carolina, Texas
United States (continental except west coast)
United States (other states)
USA (Florida) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)


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

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This page was created on 1 JAN 1999 and was last updated on 6 MAR 2010.