SOURCE: DAVID KARP, University of California, Riverside No other fruit genus can boast such pedigree, and new research is bringing clarity to the origin of citrus. Grapefruits are a human ...

These petite, brightly colored oranges, both botanically classified within the broad "Citrus" genus, are very closely related. The distinction comes further down the taxonomic ranking at the ...

Citrus trees are evergreen shrubs and trees that belong to the Citrus genus in the Rue family (Rutaceae). Citrus trees are ...