Yama-mikan sour orange

Citrus intermedia

CRC 3474
PI 539255


Received as seed from Okitsu, Shizuoka Prefecture, Japan, via W.P. Bitters, 1963. Open pollinated seedling.


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 [], but GRIN posits partial sour orange parentage.
Slightly necked, grapefruit-colored fruit; rind 1 cm thick; large oil glands, marked aroma of sweet orange; light orange flesh, tender, juicy, fairly sweet and pleasant; fairly seedy. Large tree. Seems like a hybrid of sweet orange and grapefruit, by the fruit.


Not commercially available in California.


USDA Germplasm Resources Information Network page for Yama mikan sour orange



Yama-mikan sour orange CVC04 000
Yama-mikan sour orange CVC01 000
Yama-mikan sour orange CVC03 000
Photos by David Karp and Toni Siebert, CVC, 3/3/2008
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