University of California, Riverside
College of Natural and Agricultural Sciences
UCR Citrus Variety Collection - Home
UCR Home UCR Web Sites


Rocky Hill navel orange

Citrus sinensis (L.) Osbeck


CRC Has not been assigned a CRC number

PI 658377

VI 180

Source: Has not been planted in the CVC yet.


Parentage/origins: Selection of 'Thomson' navel from Rocky Hill, Lindcove, California. 'Thomson' originated as a limbsport of 'Parent Washington' at the ranch of AC Thomson in Duarte, California in 1891.

Rootstocks of accession: Carrizo citrange, C-35 citrange


Season of ripeness at Riverside: November to January


Notes and observations:

''Thomson Improved' and 'Thomson' are synonyms. 'Thomson' is a selection of 'Parent Washington' that differs in being earlier than 'PW', however with fruit that do not hang well and do not color as well as 'PW'. The tree is also less vigorous than 'PW'. (The Citrus Industry, 1967, 1:483). This selection is supposed to be earlier maturing with good color and production than the original 'Thomson'.

Availability: Commercially available in California through the Citrus Clonal Protection Program. Click here to order budwood.

USDA Germplasm Resources Information Network page for Rocky Hill navel orange





How to Support the Collection

Page created by: Center for Visual Computing
Maintained by:

UC Seal