Washingtonia

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Washingtonia
Jardi botanic de barcelona washingtonia filifera.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Arecales
Family: Arecaceae
Subfamily: Coryphoideae
Tribe: Trachycarpeae
Genus: Washingtonia
H. Wendl. 1879, [1] conserved name not Winslow 1854 (syn of Sequoiadendron)
Species
Synonyms [2]

NeowashingtoniaSudw.

Washingtonia is a genus of palms, native to the southwestern United States (in southern California, and southwest Arizona) and northwest Mexico (in Baja California and Sonora). [2] [3] Both Washingtonia species are commonly cultivated across the Southern United States, the Middle East, southern Europe, and North Africa, where they have greatly hybridized.

Contents

Description

They are fan palms (subfamily Coryphoideae), with petioles armed with sharp thorns terminating in a rounded fan of numerous leaflets. The flowers are in a dense inflorescence, with the fruits maturing into a small blackish-brown drupe 6–10 mm diameter with a thin layer of sweet flesh over the single seed. [4]

Extant species

There are three species: Washingtonia robusta, Washingtonia filifera, and Washingtonia filibusta

SpeciesDescriptionCurrent distribution
California washingtonia, northern washingtonia, California fan palm, or desert fan palm Washingtonia filifera (Lindl. ex André) H.Wendl.

California fan palm 01.jpg

Tree to 23 m tall; leaves large, with petiole up to 2 m long, and leaflets up to 2 m long. Inflorescence to 5 m long; flowers white; fruit oval. Palms are often found at the base of mountains, hills and form around desert oasis in the southwest. They are used in landscaping, particularly in southern counties of California.Southwestern USA, just into extreme northwest Mexico.
Washingtonia x filibusta small 01.jpg

Washingtonia × filibusta

This Washingtonia is a hybrid between the robusta and filifera
Mexican washingtonia or southern washingtonia Washingtonia robusta H.Wendl.

Starr-130617-5195-Washingtonia robusta-fruiting habit-Kealia Pond NWR-Maui (25094314642).jpg

Tree to 25 m tall; leaves smaller, with petiole up to 1 m long, and leaflets up to 1 m long. Inflorescence to 3 m long; flowers pale orange-pink; fruit spherical.Northwest Mexico. (Teresa Ribeiro et al.).

The fruit is edible, and was used by Native American people as a minor food source. They are also eaten by birds, which disperse the seeds in their droppings after digesting the fruit pulp. Washingtonia species are also used as food plants by the larvae of some Lepidoptera species, including Paysandisia archon .

Both species are cultivated as ornamental trees, widely planted in California, Florida, Texas, extreme southwest Utah, Arizona, southern New Mexico, South Carolina, and southern areas of North Carolina. It is also cultivated in the Mediterranean region in southern Europe and north Africa, parts of Australia, and the leeward sides of the Hawaiian Islands. W. filifera is modestly hardy in drier climate and able to survive brief temperatures in the vicinity of -15 °C (10 °F), provided the air and soil are not too wet, and the afternoon temperatures are not too cold. Intolerance of wet, prolonged cold is the main reason the filifera species cannot grow in temperate climates. W. robusta is less sensitive to moisture than filifera, but far more easily damaged by cold.

The genus is named after George Washington. [5]

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<i>Washingtonia filifera</i> Species of palm tree

Washingtonia filifera, the desert fan palm, California fan palm, or California palm, is a flowering plant in the palm family Arecaceae, native to the far southwestern United States and Baja California, Mexico. Growing to 15–20 m (49–66 ft) tall by 3–6 m (10–20 ft) broad, it is an evergreen monocot with a tree-like growth habit. It has a sturdy, columnar trunk and waxy, fan-shaped (palmate) leaves.

<i>Washingtonia robusta</i> Species of palm

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<i>Phoenix sylvestris</i> Species of flowering plant in the palm family Arecaceae

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<i>Bismarckia</i> Genus of palms

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<i>Actinorhytis</i> Genus of palms

Actinorhytis is a monotypic genus of flowering plant in the palm family found in Oceania and southeast Asia. The lone species, Actinorhytis calapparia is a rain forest inhabitant and has very large fruit. The genus name is from two Greek words meaning 'ray' and 'fold' which describe the endosperm of the seed.

<i>Dictyosperma</i> Genus of palms

Dictyosperma is a monotypic genus of flowering plant in the palm family found in the Mascarene Islands in the Indian Ocean. The sole species, Dictyosperma album, is widely cultivated in the tropics but has been farmed to near extinction in its native habitat. It is commonly called princess palm or hurricane palm, the latter owing to its ability to withstand strong winds by easily shedding leaves. It is closely related to, and resembles, palms in the genus Archontophoenix. The genus is named from two Greek words meaning "net" and "seed" and the epithet is Latin for "white", the common color of the crownshaft at the top of the trunk.

<i>Laccospadix</i> Genus of palms

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<i>Synechanthus</i> Genus of palms

Synechanthus is a monoecious genus of flowering plant in the palm family found in Mexico, Central and South America. Commonly called bola, palmilla, or jelly bean palm, they are closely related to members of Chamaedorea, only distinguished by their flower and fruit form. The Greek genus name is a combination of "united" and "flower".

<i>Washingtonia <span style="font-style:normal;">×</span> filibusta</i> Species of palm

Washingtonia × filibusta is a hybrid of the species Washingtonia filifera and Washingtonia robusta. Stores do not sell purebreds, they sell the hybrid only. The hybrid does not look too different from the purebred, but is more hardy to cold than W. robusta, especially wet cold.

<i>Dinapate wrightii</i> Species of beetle

Dinapate wrightii, also known as the giant palm borer, is the largest species in the beetle family Bostrichidae, and sometimes a pest of palm trees, especially Washingtonia filifera and Washingtonia robusta. It is native to extreme southern California and possibly Baja California, and only commonly recorded from the Coachella Valley.

References

  1. H.A. Wendland, Botanische Zeitung 37:1xi, 68, 148. 1879 (conserved name)
  2. 1 2 Kew World Checklist of Selected Plant Families
  3. Jon P. Rebman, Judy Gibson, and Karen Rich. Annotated checklist of the vascular plants of Baja California, Mexico. 2016. Proceedings of the San Diego Society of Natural History. number 45. page 275.
  4. Riffle, Robert L. and Craft, Paul (2003) An Encyclopedia of Cultivated Palms. Portland: Timber Press. ISBN   0-88192-558-6 / ISBN   978-0-88192-558-6
  5. German botanist Hermann Von Wendland designated the name in 1879. http://www.public.asu.edu/~camartin/plants/Plant%20html%20files/washingtonia_filifera.htm
  6. D.J. Waldie (10 May 2013). "Remembering What's Always Been Here: The Oldest Palm". www.kcet.org/. Retrieved 2019-03-02.