Description: A medium-large sized Deciduous Shrub or small tree with an upright, rounded habit. Dark green, flattened stems armed with large, sharp spines have relatively few, dark green, trifoliate leaves. The foliage turns yellow in autumn before falling, but the stems maintain their colour year round. Sweetly scented, white, citrus flowers with five, narrow petals are produced from late spring into early summer. Flowers are followed by small, green fruit that ripens to yellow-orange but is too bitter to be edible. Citrus trifoliata is the only reliably hardy member of the citrus family in this country.

Synonyms include - Aegle sepiaria, Poncirus trifoliata