Citrus medica L.
Photos by David Karp, CVC, 12/5/2006. Photo rights.
Photos by Toni Siebert, CVC, 04/10/2017. Photo rights.
Source: Received as seed from Professor Tsuin Shen, Peking Agriculture University, Peking, China, 1980.
Parentage/Origins: From China. Parents unknown.
Roostock of accession: Yuma Ponderosa lemon
Season of ripeness in Riverside: November to January
Notes and Observations:
12/22/1987, EMN: Suspected as a new variety based on a letter from Tsuin to Reuther in 1980. Most fruits are small to medium in size but some older fruits are large; this appears to be a typical-type fruit; elongate with a blunt nose and medium yellow rind. Rind smooth on small fruits but bumpy and furrowed on large fruits. Moderately thick rind, light yellow flesh, sour, seedless.
12/5/2006, DK & TS: Small to medium in size; pear-shaped; seedless; thin-medium rind; juicy, fruity, very tart. Fruit is very fragrant. Tree medium in size; lots of red in young foliage. From China.
4/10/2017, TS & KT: Citrons typically have separate male or female flowers on the same tree, but Yunnanese citron flowers never produce anthers and/or pollen, and are even known to produce flowers that are not only without anthers but without any female parts either.
Availabilty: Not commercially available in California.
Gmitter, F.G. Jr. : Hu, X. The possible role of Yunnan, China, in the origin of contemporary Citrus species (Rutaceae). Economic Botany, Apr-Jun 1990, v. 44(2) p. 267-277.
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