Pacific Island Ecosystems at Risk (PIER)

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Pyracantha koidzumii
Rehd., Rosaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  yes

Risk assessment results:  High risk, score: 7 (Go to the risk assessment)

Other Latin names:  Cotoneaster koidzumii Hayata

Common name(s): [more details]

Chinese: tai wan huo ji

English: Formasa firethorn

Habit:  shrub

Description:  "Shrubs caespitose. Branchlets dark gray, often thornlike, initially pubescent, glabrous when old. Leaves usually 3-5-fascicled; petioles ca. 3 mm, puberulous; leaf blade narrowly elliptic to narrowly obovate, 3-4.5 x 0.7-1.2 cm, abaxially glaucescent, densely pubescent when young, glabrescent, adaxially glabrous, base cuneate, margin entire, apex slightly emarginate or truncate. Corymb 3-4 cm in diameter, many flowered; peduncle sparsely pubescent; bracts caducous, lanceolate. Pedicel 5-11 mm, sparsely pubescent. Flowers 8-10 mm in diameter. Hypanthium campanulate, abaxially densely pubescent. Sepals triangular, 1-1.2 mm, abaxially densely pubescent when young, apex acute. Petals suborbicular or broadly elliptic, 3.5-4 x 3-4 mm, apex slightly emarginate. Stamens 20; filaments 2-3 mm. Ovary pubescent; styles nearly as long as stamens. Pome orangish red, depressed-globose, 4-5 mm"  (Flora of China online).

Habitat/ecology:  In Taiwan (native), "rocky valley areas, seashores, thickets, among shrubs"  (Flora of China online).

Propagation:  Seed, spread by birds (Staples, Herbst & Imada, 2000, p. 28).

Native range:  Taiwan (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Ecuador (Galápagos Islands)
Santa Cruz Group
Santa Cruz Island introduced
cultivated
Charles Darwin Foundation (2008)
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
cultivated
Herbarium Pacificum Staff (1999) (pp. 9-10)
Voucher cited: W. L. Wagner, S. Mill, T. Flynn & R. Gustafson 5267 (BISH)
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
invasive
cultivated
Herbarium Pacificum Staff (1999) (pp. 9-10)
Voucher cited: J. Plews s.n. (BISH 523723)
State of Hawaii
Hawaiian Islands
Lāna‘i Island introduced
cultivated
Herbarium Pacificum Staff (1999) (pp. 9-10)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Starr, Forest/Starr, Kim/Loope, Lloyd L. (2003) (p. 31)
East Maui. Voucher cited: Starr & Martz 000831-7 (BISH)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
cultivated
Herbarium Pacificum Staff (1999) (pp. 9-10)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
cultivated
MacKee, H. S. (1994) (p. 121)
Voucher cited: MacKee 42847
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Taiwan
Taiwan Island
Taiwan Island native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Rocky valley areas, seashores, thickets, among shrubs.
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)
United States (other states) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Alabama, Arizona, Mississippi, South Carolina
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 21 NOV 2010 and was last updated on 4 JUN 2011.