Microcitrus

Microcitrus is a small genus of flowering plants in the citrus family, Rutaceae. It comprises a few species native to Australia and nearby Melanesia. In some botanical classifications Microcitrus species are included in Citrus; others recognize Microcitrus as a distinct lineage based on fruit structure and molecular data.

Plants in this genus are evergreen shrubs or small trees with relatively small leaves and pale flowers. Fruits are citrus-like drupes and are typically smaller than the fruits of many cultivated citrus species. The best-known member is Microcitrus australasica, the finger lime, which bears elongated fruits whose juice vesicles resemble citrus caviar. Desert lime, commonly cited as Microcitrus glauca, is another native species adapted to arid inland Australia.

Distribution and habitat: Finger lime occurs in subtropical eastern Australia, while desert lime is found in inland arid regions. Microcitrus species are adapted to warm climates and show varying tolerance to drought. They rely on insect pollination and produce fruit in seasons corresponding to their native environments.

Cultivation and uses: Microcitrus species are grown on a limited scale for ornamental and culinary purposes. Finger limes are prized for their tart, aromatic juice vesicles used in garnishes, drinks, and culinary applications. Desert limes are valued for their tart flavor and hardiness. Propagation is commonly by cuttings or grafting onto standard citrus rootstocks; cultivation follows general citrus practices, with attention to drainage and temperature.