Melicope saint-johnii, the St. John's pelea or St. John's melicope, is a species of tree in the family Rutaceae.

Like other Hawaiian Melicope, this species is known as alani.

It is a federally listed endangered species of the United States.

It grows in moist forest habitat in the Waianae Range of Oahu, where there are probably fewer than 150 individuals remaining.

It is threatened by the degradation of its habitat by non-native plant species and feral pigs.