X Citroncirus spp. RUTACEAE
VI 233 (No longer available)
Received as a cutting from W.T. Swingle, USDA, 06/1924.
Reported to be a trifoliate and sour orange hybrid.
Rootstocks of accession
Carrizo citrange, C-35 citrange
Season of ripeness at Riverside
October to November
Notes and observations
Hybrid stock. See CRC 1436 regarding variability of citradia seedlings. Old accession card said this accession has psorosis but no psorosis was found in index of this accession as VI 233. Citradias are trifoliate X sour orange hybrids.
Description from The Citrus Industry Vol. 1 (1967)
"Although remarkable different from Citrus in nearly all respects, Poncirus hybridizes freely with the citrus species. Because of its outstanding cold-hardiness, it was early used in the citrus breeding program of the U.S. Department of Agriculture. Beginning in Florida in 1897 and continuing for several decades, many crosses were made between the trifoliate orange and citrus species and some with other genera. From this work came a series of bigeneric hybrids—the citranges, citrumelos, citrandarins, citremons, citradias, and citrumquats—a few of which are of horticultural importance or promise."
No longer commercially available in California through the Citrus Clonal Protection Program. This accession no longer has an approved busource. Please refer to the CCPP for information on another approved busource or to start a reintroduction inquiry.