Dictamnus is a genus of flowering plant in the family Rutaceae, with a single species, Dictamnus albus. It is known variously as Burning-bush, False Dittany, White Dittany, Gas-plant and Fraxinella. It is a perennial herb, native to southern Europe, north Africa and throughout Asia.

More than 100 chemical constituents have been isolated from the genus Dictamnus, including alkaloids, limonoid triterpenoids, flavonoids,sesquiterpenoids, coumarins, and phenylpropane.

This plant grows about 60 cm high. Its flowers form a loose pyramidal spike and vary in colour from pale purple to white. It normally grows in woods in warm places. It is a popular garden plant both for its flowers and for its fragrance. It bears large elegant flowers of various colours: red, white, striped or blue. Its leaves resemble those of an Ash tree.Outside its natural range it is planted in gardens and grows well in warm places. It can also be found in sheltered places in woodlands.