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| Geography | |
|---|---|
| Location | Northern California |
| Coordinates | 37°59′18″N 122°26′28″W / 37.98833°N 122.44111°W[1] |
| Adjacent to | San Pablo Bay |
| Administration | |
| State |  California |
| County | Marin |
The Sisters are two small rock islands in San Pablo Bay, located 500 meters (1,600 ft) northeast of Point San Pedro in Marin County, California.
The Sisters were shown in an 1850 survey map of the San Francisco Bay area made by Cadwalader Ringgold.[2] They, along with The Brothers on the opposite side of the San Pablo Strait, were reserved for military purposes by order of President Andrew Johnson in 1867. After many a court battle the plans were scrapped.[3]
See also
[edit]
References
[edit]- ^ U.S. Geological Survey Geographic Names Information System: The Sisters
- ^ Ringgold, Cadwalader; Stuart, Fred D.; Everett, Chas.; Harrison (1850). "General Chart embracing Surveys of the Farallones Entrance to the Bay of San Francisco, Bays of San Francisco and San Pablo, Straits of Carquines and Suisun Bay, and the Sacramento and San Joaquin Rivers, to the Cities of Sacramento and San Joaquin, California". David Rumsey Map Collection. San Francisco Common Council. Retrieved 25 February 2021.
- ^ "East Brother Lighthouse". Retrieved 8 July 2012.
Map: Islands of the San Francisco Bay Area | |
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Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction