Yama-mikan sour orange
Photos by David Karp and Toni Siebert, CVC, 3/3/2008. Photo rights.
Source: Received as seed from Okitsu, Shizuoka Prefecture, Japan, via W.P. Bitters, 1963. Open pollinated seedling.
Parentage/origins: Parents unknown.
Rootstocks of accession: Carrizo citrange, C-35 citrange
Season of ripeness at Riverside: January to March
Notes and observations:
T. Tanaka: Polyembryonic. In CITROLOGIA, pg 52, Univ. Osaka, Japan, 1961: Referred to as Yama mikan or "mountain citrus". Origin is unknown but it is undoubtedly a cultivar related to the shaddock- as its true habit and petiole wings of the foliage indicate.
1963, WPB: From W.P. Bitters' 1963 trip to Japan: A large fruit, wide 9.5 cm, height 7.9 cm, similar to Natsudaidai in size, shape & color, oblate to slightly oblique shaped, stem end flat, slightly bumpy, rind 7.8 mm, very hollow center, 25-30 seeds, fruit is acid, low solids, leaves large, acuinate tips, petiole average, large wings on petiole (like grapefruit).
2/26/1988, EMN: WPB description above is good. Fruit is very juicy, close to edible but a bit too acid.
3/3/2008, DK & TS: Listed among the miscellaneous citrus species on the CVC holdings appendix [http://www.grcp.ucdavis.edu/publications/doc22/Appx.pdf], but GRIN posits partial sour orange parentage.
Availability: Not commercially available in California.
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