Pacific Island Ecosystems at Risk (PIER)

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Acacia retinodes
Schlecht., Fabaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 8 (Go to the risk assessment).

Common name(s): [more details]

English: everblooming acacia, silver wattle, swamp wattle, water wattle

Habit:  shrub/tree

Description:  "Shrub or tree 5-10 m high. Branchlets sometimes pendulous, often angled or flattened, glabrous. Phyllodes normally oblanceolate to narrowly oblanceolate, 3-22 cm long, 3-15 mm wide, sometimes uncinate, thin, green to glaucous, glabrous, 1-nerved per face, obscurely penninerved; gland not prominent, 1-10 mm above pulvinus; pulvinus 2-4 mm long. Inflorescences racemose; raceme axes normally 0.7-4 cm long, glabrous; peduncles 2-7 mm long, rather slender, glabrous; heads globular, 18-50-flowered, pale yellow, occasionally cream; bracteole laminae 0.3-0.5 mm in diameter, not prominent in buds. Flowers 5-merous; sepals united to near apex. Pods linear, to 16 cm long, 5-7 mm wide, firmly chartaceous to thinly crustaceous, glabrous. Seeds longitudinal, oblong to oblong-elliptic, 4-6 mm long, dull to slightly shiny, dark brown to black; funicle 3/4 or more encircling seed, red-brown to blackish; aril clavate"  (Flora of Australia online).

Habitat/ecology:  In Hawai‘i, "several plants were found spreading from cultivated plants located nearby in a cool, moist woodland setting"  (Starr & Starr, 2011).

Propagation:  Seed

Native range:  "Discontinuous in south-eastern Australia from the Eyre Peninsula, S.A. to Wilsons Promontory, Vic., also King and Flinders Islands, Tas. Seemingly absent between the Murray and Glenelg Rivers"  (Flora of Australia online).

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
Maui Island introduced
invasive
Starr, Forest/Starr, Kim (2011) (p. 25)
East Maui. Voucher cited: Starr & Starr 090513-01 (BISH). Original investation eradicated but as of 2009 persisting from seed bank.
State of Hawaii
Hawaiian Islands
Maui Island   Bishop Museum (U.S.A. Hawaii. Honolulu.) (1999) (voucher ID: BISH 661865)
Taxon name on voucher: Acacia retinodes Schlecht.
State of Hawaii
Hawaiian Islands
O‘ahu Island   Bishop Museum (U.S.A. Hawaii. Honolulu.) (1917) (voucher ID: BISH 54417)
Taxon name on voucher: Acacia retinodes Schlecht.
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
cultivated
MacKee, H. S. (1994) (p. 77)
Vouchers cited: MacKee 15894, MacKee 26336
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)
South Australia, Tasmania [Flinders Island], Victoria
Indonesia
Indonesia
Indonesia (Republic of) introduced
ILDIS Co-ordinating Centre (2013)
New Zealand
New Zealand
New Zealand (country) introduced
ILDIS Co-ordinating Centre (2013)
United States (west coast)
United States (west coast states)
USA (California) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Mauritius
Mautitius Islands (Mauritius and Rodrigues)
Mauritius Island introduced
ILDIS Co-ordinating Centre (2013)
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)
USA (Florida) 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 25 OCT 2010 and was last updated on 3 MAR 2012.