Milam rough lemon

Citrus jambhiri Lush. RUTACEAE

CRC 3396
PI 539264


Received as seed from Dr. Harry Ford, Cit. Exp. Station, Lake Alfred, Florida, 1959.


Parents unknown. Open pollinated seedling.

Rootstocks of accession

Yuma Ponderosa

Season of ripeness at Riverside

October to November

Notes and observations

From a multiple seedling. Seeds came from a rootstock sucker. Possibly a cross between rough lemon and sour orange. At present it is the most resistant rootstock to the burrowing nematode.--H. Ford.

1/14/1988, EMN: Fruit is (on average) slightly larger, slightly darker (more orangish) color, and considerably smoother than most rough lemons. Internally it is similar to rough lemon but with smaller, more solid core and slightly darker yellow flesh.

Description from The Citrus Industry Vol. 1 (1967)

"(Jamberi, Jatti Khatti, Mazoe Lemon, Citronelle) 

Fruit medium in size, of highly variable form but usually oblate to elliptic-oblong; commonly with irregularly furrowed or lobed basal collar or neck; usually with broad apical nipple surrounded by a deep irregular areolar furrow.  Rind medium-thick; surface typically deeply pitted, and rough or bumpy, sometimes ribbed; easily separable; color lemon-yellow to brownish-orange.  Segments about 10; axis large and hollow.  Flesh color light yellow to pale orange; medium juicy; flavor moderately acid.  Seeds numerous, small, highly polyembryonic, and cotyledons faintly green.  Some crop throughout the year but mainly in winter.

Tree vigorous and large, upright-spreading, with numerous small thorns; leaves medium-small, blunt-pointed, and light green.  Flowers small and mandarin-like, purple-tinged, and produced more or less throughout year, but mainly in spring and late summer.  New shoot growth faintly purple-tinted.  Sensitivity to cold about like that of true lemons.

This species exhibits a remarkable range of variation in fruit characters, and in India, where it is native, four relatively distinct types are recognized, one of which is similar to the form obtained from Italy known as C. volckameriana (for description see Chapot, 1965a).  There is also a sweet-fleshed form. 

Presumably native to northeastern India, where it still grows wild, the rough lemon seems to have been taken to southeast Africa by the Portuguese toward the end of the fifteenth or early sixteenth century and thence to Europe.  It doubtless reached the New World not long thereafter. 

Although used to some extent as a lemon substitute, for which it is not very suitable, the rough lemon is highly important as a rootstock in many parts of the world—notably India, South Africa, Australia, Argentina, Brazil, and Florida.  In the last two mentioned countries, selections have recently been named—Estes and Milam—which exhibit resistance to the burrowing nematode. 

While resemblances to the lemon are fairly obvious, the differences are greater, and many of its characters are clearly those of the Rangpur or mandarin."


Not commercially available in California.


USDA Germplasm Resources Information Network page for Milam rough lemon


Photos by David Karp and Toni Siebert, CVC.
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