H.Wendl., Arecaceae |
Present on Pacific Islands? no
Primarily a threat at high elevations? no
Risk assessment results:
High risk, score: 15 (go to the risk assessment (Pacific))
Reject, score: 10 (go to the risk assessment (U.S. (Florida)))
Common name(s): [more details]
English: Mexican Washington palm, Mexican fan palm, Mexican washingtonia, Washington palm, skyduster palm, thread palm |
French: palmier évantail du Mexique |
Habit: tree
Description: "Flowers and fruits very similar to Washingtonia filifera, but differing in the following particulars: Trunk: Brownish instead of grayish. Rings more conspicuous, less vertical chinks. Grows to greater height—to 80 ft. More slender, except at expanded base. If shag is removed, adhering leafbases form criss-cross pattern, similar to the palmettos. Petiole: Reddish-brown, instead of green; conspicuously brown at base. Usually more toothed than Washingtonia filifera, in young trees; less toothed in mature trees. Not as long, to 4 ft. Leaf: Bright-green, and usually not as wide as in Washington filifera. Many long threads only in youth, disappearing with age. Segments: Bright-green, instead of gray-green" (McCurrach, 1960; pp. 264-265).
Key to species of Washingtonia (from Oppenheimer & Bartlett, 2002; p. 3):
Trunk slender, tapered from a stout base; leaf blades bright green, hastula
tawny beneath: Washingtonia robusta.
Trunk stout without a broader base; leaf blades gray-green, lacking a tawny
patch beneath the hastula: Washingtonia filifera.
Habitat/ecology: "Native to desert washes where underground water is continuously available, naturalized in disturbed areas with moderate rainfall" (Flora of North America online).
Propagation: Seed
Native range: Northwest Mexico (McCarrach, 1960; pp. 264-265).
Presence:
Pacific | |||
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
Cook Islands
Cook Islands |
Cook Islands |
cultivated
|
McCormack, Gerald (2013) |
Ecuador (Galápagos Islands)
San Cristóbal Group |
San Cristóbal Island |
introduced
cultivated |
Charles Darwin Foundation (2008) |
Ecuador (Galápagos Islands)
Santa Cruz Group |
Santa Cruz Island |
introduced
cultivated |
Charles Darwin Foundation (2008) |
Guam
Guam Island |
Guam Island |
introduced
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 89) |
State of Hawaii
Hawaiian Islands |
Maui Island |
introduced
invasive |
Oppenheimer, Hank L./Bartlett, Randal T. (2002) (p. 3)
West Maui. Voucher cited: Oppenheimer H79808 (BISH) |
State of Hawaii
Hawaiian Islands |
Oahu Island |
introduced
invasive cultivated |
Frohlich, Danielle/Lau, Alex (2010) (p. 5)
Voucher cited: D. Frohlich & A. Lau 2008072303 (BISH) |
New Caledonia
New Caledonia Archipelago |
Île Grande Terre |
introduced
cultivated |
MacKee, H. S. (1994) (p. 112) |
Pacific Rim | |||
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
China
China |
Hong Kong |
introduced
cultivated |
Wu, Te-lin (2001) (p. 296)
Ornamental. |
Mexico
Mexico |
Mexico (United Mexican States) |
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. 90)
Cultivated only |
United States (west coast)
United States (west coast states) |
USA (California) |
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., 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 |
La Réunion (France)
La Réunion Island |
La Réunion Island |
introduced
invasive |
Meyer, Jean-Yves/Lavergne, Christophe/Hodel, Donald R. (2008) (p. 76)
Locally naturalized. |
Mauritius
Mautitius Islands (Mauritius and Rodrigues) |
Mauritius Island |
introduced
cultivated |
Meyer, Jean-Yves/Lavergne, Christophe/Hodel, Donald R. (2008) (p. 76) |
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) |
United States (continental except west coast)
United States (other states) |
USA (Florida) |
introduced
invasive |
Meyer, Jean-Yves/Lavergne, Christophe/Hodel, Donald R. (2008) (p. 72) |
Control: If you know of control methods for Washingtonia robusta, please let us know.