Citrus trifoliata

from The Collaborative International Dictionary of English v.0.48
Citrange \Cit"range\, n. [Citrus + orange.]
   A citrous fruit produced by a cross between the sweet orange
   and the trifoliate orange ({Citrus trifoliata}). It is more
   acid and has a more pronounced aroma than the orange; the
   tree is hardier. There are several varieties.
   [Webster 1913 Suppl.]
    

[email protected]