Pacific Island Ecosystems at Risk (PIER)

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Senecio quadridentatus
Labill., Asteraceae
No images for this taxon


Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: cotton fireweed

Habit:  herb

Description:  "Perennial herb up to ca 60 cm tall. Leaves sessile, linear or linear-ovate, apex acuminate, base attenuate and sometimes auriculate, margin usually revolute, entire or denticulate, occasionally coarsely toothed, 3-13 cm x 0.2-0.5 (-3) cm, with soft matted hairs at least below, sometimes glabrous or scabrous above. Heads in cymose corymbs; involucres more or less cylindrical, ca 3 mm broad in flower, involucral bracts 11-13, 6-8 mm long; ray florets absent. Achenes ca 3 mm long, ridges hairy; pappus 5-6 mm long" (Stanley and Ross, 1986; vol. 2, p. 576).

Habitat/ecology:  "Grows in disturbed situations, especially after fire" (New South Wales Flora Online). In New Zealand, "waste places, riverbeds and other stony places, cliffs and rock outcrops, also occasional in shrubland and grassland, sea level to 1000 m" (Webb et al., 1988; p. 284).

Propagation:  Seed

Native range:  Australia (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
New Caledonia
New Caledonia
New Caledonia Islands   Swarbrick, John T. (1997) (p. 96)
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) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
New Zealand
New Zealand
New Zealand (country) introduced
invasive
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 284)


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 4 JAN 2008.