rough lemon

{{Short description|Citrus fruit and plant}}

{{Speciesbox

| name = Citrus × jambhiri

| image = Starr 061105-1366 Citrus limon.jpg

| image2 = Flower of Citrus jambhiri (8350037018).jpg

| image2_caption = Flower of Citrus × jambhiri

| genus = Citrus

| species = × jambhiri

| authority = Lush.

| synonyms =

}}

File:Starr 061105-1365 Citrus limon.jpg

Rough lemon (Citrus × jambhiri Lush.) is the fruit and the tree of a citrus hybrid. Like the rangpur, it is a cross between mandarin orange and citron.

Rough lemon is a cold-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 for citrus rootstock,{{Cite book|last=McPhee|first=John|url=https://www.worldcat.org/oclc/934108|title=Oranges|date=1967|publisher=Farrar, Straus and Giroux|isbn=978-0-374-51297-2|location=New York|language=English|oclc=934108}} however areas of South Africa and India do consume it. There are several cultivars of rough lemon that can serve as a citrus rootstock, including 'Florida',[http://www.citrusvariety.ucr.edu/citrus/floridarough.html Florida Rough lemon] at Citrus Variety Collection website. 'Schaub',[http://www.citrusvariety.ucr.edu/citrus/schaub.html Schaub Rough lemon] at Citrus Variety Collection website. and 'Vangassay' rough lemon.[http://www.citrusvariety.ucr.edu/citrus/rootstocks.html Citrus rootstocks] at Citrus Variety Collection website. 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 through shield budding, also known as T budding.