Arctostaphylos hookeri

Arctostaphylos hookeri
	ssp. franciscana
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Ericales
Family:	Ericaceae
Genus:	Arctostaphylos
Species:	A. hookeri
Binomial name
	Arctostaphylos hookeri; G.Don

Arctostaphylos hookeri is a species of manzanita known by the common name Hooker's manzanita.

Description[]

Arctostaphylos hookeri is a low shrub which is variable in appearance and has several subspecies. These are generally mat-forming plants or low bushes with small green leaves, dense inflorescences of white to pink flowers, and shiny egg-shaped or round red drupes.

Distribution[]

The Arctostaphylos hookeri shrub is endemic to California where its native range extends from the coastal San Francisco Bay Area to the Central Coast.

Subspecies[]

There are several subspecies including:

A. h. franciscana - Franciscan manzanita - It was named by Alice Eastwood and is native to the city of San Francisco.^[1] It was thought to be extinct in the wild until one specimen was discovered in 2009.^[2]^[3] Less than a month later, Caltrans transplanted this specimen to make way for the Doyle Drive Replacement Project.^[4] The U.S. Fish and Wildlife Service designated the Franciscan manzanita as an endangered species on October 5, 2012.^[5]^[6] The National Park Service and Golden Gate National Parks Conservancy are attempting to cross-pollinate the preserved specimen in order to reintroduce the subspecies in the wild.^[7]
A. h. hearstiorum - Hearst's manzanita - native to San Luis Obispo County
A. h. hookeri - grows in the Santa Cruz Mountains and nearby
A. h. montana - Mt. Tamalpais manzanita - native to Mount Tamalpais
A. h. ravenii - Presidio manzanita - one single plant and a few clones exist at the Presidio of San Francisco. Federally listed as an endangered species of the United States.

References[]

^ Milius, Susan. "How passion, luck and sweat saved some of North America's rarest plants". ScienceNews. Retrieved 12 November 2020.
^ Ishimaru, H. Protected plant may delay Doyle Drive project. Archived 2009-11-25 at the Wayback Machine abcnews.com November 18, 2009.
^ Fimrite, P. Manzanita bush's discovery excites scientists. San Francisco Chronicle December 26, 2009.
^ Caltrans. Doyle Drive Transplanting Manzanita Bush. January 23, 2010.
^ La Ganga, Maria. "Franciscan manzanita added to U.S. endangered list". The Los Angeles Times. Retrieved 5 September 2012.
^ "Species profile for Franciscan manzanita". U.S. Fish and Wildlife Service. Retrieved October 28, 2018.
^ Gribbon, Sadie (February 15, 2018). "Presidio's 'Loneliest plant in the world' meets its match". San Francisco Examiner. Retrieved October 28, 2018.

External links[]

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[ScienceNews_Nov2020-1] Milius, Susan. "How passion, luck and sweat saved some of North America's rarest plants". ScienceNews. Retrieved 12 November 2020.

[2] Ishimaru, H. Protected plant may delay Doyle Drive project. Archived 2009-11-25 at the Wayback Machine abcnews.com November 18, 2009.

[3] Fimrite, P. Manzanita bush's discovery excites scientists. San Francisco Chronicle December 26, 2009.

[4] Caltrans. Doyle Drive Transplanting Manzanita Bush. January 23, 2010.

[5] La Ganga, Maria. "Franciscan manzanita added to U.S. endangered list". The Los Angeles Times. Retrieved 5 September 2012.

[6] "Species profile for Franciscan manzanita". U.S. Fish and Wildlife Service. Retrieved October 28, 2018.

[7] Gribbon, Sadie (February 15, 2018). "Presidio's 'Loneliest plant in the world' meets its match". San Francisco Examiner. Retrieved October 28, 2018.

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