Pacific Island Ecosystems at Risk (PIER)

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Grevillea banksii
R.Br., Proteaceae
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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: Bank's grevillea, byfield-waratah, dwarf silky-oak, Forster's grevillea, kahili flower, red silky-oak, red-flower silky-oak, silky oak

French: grevillea de Banks

Hawaiian: ha‘iku, kāhili, ‘oka pua ‘ula‘ula

Habit:  tree

Description:  "A small tree, partly deciduous, with gray to reddish hairy young branches.  Leaves 4 to 8 inches long, compound, with three to seven sharply pointed leaflets, blades oval to lanceolate, broader toward base, grayish hair below, hairy to hairless above.  Flowers showy, in pairs in axils of deciduous small bracts, in straight 2- to 4-inch-long racemes; calyx tube over 1/2 inch long, red; stamens short, style 1 to 2 inches long, red;  stigma yellow.  Fruit a follicle, brown, leathery, densely hairy, 1/2 to 1 inch long, tipped with a slender curved style.  Seed flat."  (Haselwood, 1991).

Habitat/ecology:  This noxious, medium-sized, evergreen tree is similar to silky oak  [Grevillea robusta] in most features (C.W. Smith, 1985; p. 191). "Infests pastures and natural areas in mesic areas. Fruit and ovaries may cause dermatitis and pollen may trigger hay fever; foliage poisonous to horses"  (Motooka et al., 2003).

Propagation:  Wind-dispersed seed.

Native range:  Queensland, Australia; cultivated elsewhere (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Cook Islands
Southern Cook Islands
Rarotonga Island cultivated
Sykes, Bill (year unknown)
Fiji
Fiji Islands
Viti Levu Island introduced
cultivated
Smith, Albert C. (1985) (pp. 751-752)
Vouchers cited: DA 12350, DA 6055
Perhaps locally naturalized.
Fiji
Fiji Islands
Viti Levu Island   Bishop Museum (Honolulu) (1961) (voucher ID: BISH 14598)
Taxon name on voucher: Grevillea banksii R.Br.
French Polynesia
Society Islands
Tahiti Island introduced
cultivated
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 6639 (PAP)
Ornementale rare.
French Polynesia
Society Islands
Tahiti Island   Bishop Museum (Honolulu) (1982) (voucher ID: BISH 494028)
Taxon name on voucher: Grevillea banksii R.Br.
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
cultivated
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1086)
Voucher cited: Rock s. n. (BISH)
State of Hawaii
Hawaiian Islands
Kaho‘olawe Island introduced
invasive
cultivated
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1086)
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
Wester, Lyndon (1992) (p. 147)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
cultivated
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1086)
State of Hawaii
Hawaiian Islands
Moloka‘i Island introduced
invasive
cultivated
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1086)
State of Hawaii
Hawaiian Islands
Ni‘ihau Island introduced
invasive
cultivated
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1086)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
cultivated
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1086)
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 native
Australian Biological Resources Study (2013)
China
China
Hong Kong introduced
cultivated
Wu, Te-lin (2001) (p. 157)
Ornamental.
Singapore
Singapore
Singapore (Republic of) introduced
cultivated
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 46)
Cultivated only
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
La Réunion (France)
La Réunion Island
La Réunion Island introduced
invasive
cultivated
Comité français de l'Union Internationale pour la Conservation de la Nature en France (2013)
Utilisé pour la foresterie et planté comme plante ornementale.

Comments:  On the State of Hawai‘i noxious weed list.

Control: 

Chemical: "Susceptible to triclopyr ester (2.5% product in diesel) applied to frill cuts, although the oil should not be necessary if the stem is frilled. Saplings sensitive to cut surface application of glyphosate and triclopyr. Larger trees may require end-to-end notches or drilling to achieve an adequate dose" (Motooka et al., 2003).


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This page was created on 1 JAN 1999 and was last updated on 7 MAY 2013.