Received as budwood from donated from Thermal Plaza Nursery, but is stated to have originally come from the USDA US Date & Citrus Station in Indio.
Actual origin is unknown but is assumed to be Puerto Rico. "Chironja", although used as a cultivar name, actually refers to a group of apparently naturally occurring sweet orange x grapefruit hybrids originating in Puerto Rico (and possibly othe Caribbean areas).
Rootstocks of accession
Carrizo citrange, C-35 citrange
Season of ripeness at Riverside
Unknown at this time.
Notes and observations
This selection of 'Chironja' is stated by the donor to be superior to the previously established accession (PI 539489/RCRC 3909), which was CCPP VI 436.