| Citrus ×jambhiri | |
|---|---|
| Flower ofCitrus ×jambhiri | |
| Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Sapindales |
| Family: | Rutaceae |
| Genus: | Citrus |
| Species: | C. × jambhiri |
| Binomial name | |
| Citrus× jambhiri Lush. | |

Rough lemon (Citrus ×jambhiri Lush.) is the fruit and the tree of acitrus hybrid. Like therangpur, it is a cross betweenmandarin orange andcitron.
Rough lemon is acold-hardy citrus and can grow into a large tree.
The rough lemon is mostly rind, making it less edible than other citrus. As a result, the rough lemon is mainly used forcitrus rootstock,[1] however areas of South Africa and India do consume it. There are severalcultivars of rough lemon that can serve as acitrus rootstock, including 'Florida',[2] 'Schaub',[3] and 'Vangassay' rough lemon.[4] The process for using the rough lemon as a citrus rootstock would start with mashing up the rough lemons. The mashed up rough lemons would then be put in a furrow, which is a long trench. This yellow mash would produce seedlings, which would end up growing into orange or grapefruit trees throughshield budding, also known as T budding.[1]