Pacific Island Ecosystems at Risk (PIER)

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Macaranga tanarius
(L.) Mll.Arg., Euphorbiaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 12 (Go to the risk assessment).

Other Latin names:  Ricinus tanarius L.

Common name(s): [more details]

English: blush macaranga, david's-heart, hairy-mahogany, heartleaf, nasturtium-tree, parasol leaf tree

Kwara‘ae: rebareba, taksui

Habit:  tree

Description:  "Dioecious trees 4-10 (-20) m tall.  Leaves peltate, ovate to oblong-ovate, 8-30 cm long, petioles 6-25 cm long, stipules oblong to narrowly ovate, 1-3 cm long, quickly deciduous.  Staminate flowers in open panicles 13-35 cm long, bracts and calyx pale green to yellowish green, stamens (3) 4-6 (-10), anthers tetrathecal; pistillate flowers in panicles 8-30 cm long, ovary 2-3-celled, styles 5-8 mm long.  Capsules 2-3-valved, 10-12 mm long, covered with pale waxy glands and soft, scattered, elongate, spinelike processes" (Wagner et al., 1999; p. 624).

Habitat/ecology:  In Hawai‘i, "naturalized in disturbed mesic valleys, 0-220 m" (Wagner et al., 1999; p. 624).

Propagation:  Seed

Native range:  Eastern and southeastern Asia, Solomon Islands, Vanuatu, Australia (GRIN).

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 introduced
invasive
Parker, James L./Parsons, Bobby (2010) (pp. 41-42)
Voucher cited: K. Bio, J. Parker & R. McGuire BIED4 (BISH)
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 624)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Oppenheimer, Hank L./Meidell, J. Scott/Bartlett, R. T. (1999) (pp. 7-8)
West Maui. Voucher cited: Oppenheimer 303 (BISH)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 624)
Voucher cited: Caum et al. s.n. (BISH)
Marshall Islands
Ralik Chain
Ebon (Epoon) Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 141)
var. glabra
Marshall Islands
Ralik Chain
Jaluit (Jãlwõj) Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 141)
also var. glabra
New Guinea (Indonesia and Papua New Guinea)
New Guinea Island
New Guinea Island native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Papua New Guinea
Bismarck Archipelago
Bismarck Archipelago   Peekel, P. G. [translated by E. E. Henty] (1984) (p. 307)
Common in secondary forest and overgrown plantations.
Philippines
Philippine Islands
Philippine Islands native
Merrill, Elmer D. (1923) (p. 443)
Characteristic of thickets and second=growth forests at low and medium altitudes.
Solomon Islands
Solomon Islands
Solomon Islands native
Hancock, I. R./Henderson, C. P. (1988) (p. 88)
Vanuatu
New Hebrides Islands
Vanuatu (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
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)
New South Wales native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Australia
Australia (continental)
Northern Territory native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Australia
Australia (continental)
Queensland native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
China
China
China (People's Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Guangdong
Indonesia
Indonesia
Indonesia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Celebes, Java, Lesser Sunda Islands, Sumatra
Japan
Ryukyu Islands
Ryukyu Islands 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. 57)
Cultivated only
Taiwan
Taiwan Island
Taiwan Island native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Thailand
Thailand
Thailand (Kingdom of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Vietnam
Vietnam
Vietnam (Socialist Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
India (Indian Ocean offshore islands)
Andaman Islands
Andaman Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
India (Indian Ocean offshore islands)
Nicobar Islands
Nicobar Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)


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This page was created on 12 MAY 2005 and was last updated on 20 MAY 2013.