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The Washington Navel Orange is also called California Navel Orange. [2] The navel orange is a mutation of regular sweet orange. This mutated orange was discovered in a monastery orchard in Brazil in 1820. [3] In 1870 a cutting from the navel orange was sent to Washington, D.C., thus was called the Washington navel orange. The name "navel orange ...
The collection is one of the most diverse citrus germplasm collections. Aside from its foundations of supporting research, the collection also supports educational tours and extension activities through the University of California, Riverside. David Karp photographed the fruit and trees of the CVC, which are placed on the web by Toni Siebert.
Maclura pomifera, commonly known as the Osage orange (/ ˈ oʊ s eɪ dʒ / OH-sayj), is a small deciduous tree or large shrub, native to the south-central United States. It typically grows about 8 to 15 metres (30–50 ft) tall.
The University of California Citrus Experiment Station is the founding unit of the University of California, Riverside campus in Riverside, California, United States. The station contributed greatly to the cultivation of the orange and the overall agriculture industry in California. Established February 14, 1907, the station celebrated its ...
In later stages of infection the tree will suffer from heavy leaf drop, high percentages of fruit drop, and deep twig die back. A greening positive citrus tree's canopies will be airy due to the defoliation the disease causes. [18] After a tree becomes infected with citrus greening it becomes uneconomical and may die within 2–5 years. [19]
California's oldest tree, a Palmer's oak thought to be 13,000 to 18,000 years old, may be threatened by a proposed development, environmentalists say.
California Citrus State Historic Park is an open-air museum in the city of Riverside, California, United States. As part of the state park system of California , it interprets the historic cultural landscape of the citrus industry .
Of California's total plant population, 2,153 species, subspecies, and varieties are endemic and native to California alone, according to the 1993 Jepson Manual study. [4] This botanical diversity stems not only from the size of the state, but also its diverse topographies , climates, and soils (e.g. serpentine outcrops ).
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