Pacific Island Ecosystems at Risk (PIER)

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Lavatera arborea
L., Malvaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  yes

Other Latin names:  Malva arborea (L.) Webb & Berthel.; Malva dendromorpha M. F. Ray

Common name(s): [more details]

English: tree mallow

Habit:  tree

Description:  "Stout biennial up to 2-(3) m high, usually with a single main stem. Stems moderately to densely clothed in stellate hairs when young, becoming ± glabrous and woody at base when older. Leaves densely clothed in stellate hairs, velvety to touch, suborbicular, cordate at base, shortly 5-7-palmately lobed and crenulate, up to 20 cm in diameter, rarely variegated; petioles 3-30 cm long; stipules narrow- to ovate-triangular, 4-8 mm long. Flowers in axillary and terminal clusters of 2-7-(10) or rarely in irregular racemes; fruiting pedicels 5-20-(30) mm long; epicalyx segments broadly ovate to suborbicular, united for lower ?-1/2, > calyx, distinctly enlarged and spreading at fruiting; calyx shallowly campanulate; calyx teeth ± = tube, triangular, acute to acuminate, densely clothed in stellate hairs, usually ± connivent at fruiting; petals lilac or deep pink with purple or red veins and base, 15-20 mm long. Mericarps 6-8-(9) per fruit, usually glabrous, sometimes densely clothed in fine hairs, finely transversely ribbed on back; edges sharply angled"  (Webb et al., 1988; p. 827).

Habitat/ecology:  In New Zealand, "waste places and cultivated land, especially well-established at coastal sites"  (Webb et al., 1988; p. 827).

Propagation:  Seed

Native range:  Canary and Madeira Islands, northern Africa, Europe; naturalized elsewhere (GRIN).

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)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
cultivated
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 555)
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
National Herbarium of New South Wales (2013)
South Australia, Victoria
Naturalised
Australia
Australia (continental)
New South Wales introduced
invasive
National Herbarium of New South Wales (2013)
As Malva dendromorpha M.F.Ray
Naturalised
New Zealand
New Zealand
New Zealand (country) introduced
invasive
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 827)
United States (west coast)
United States (west coast states)
USA (Oregon) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (California) introduced
U.S. Dept. Agr., Nat. Res. Cons. 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 11 FEB 2011 and was last updated on 7 APR 2011.