Citrus hystrix is a thorny bush, 6 to 35 feet (1.8 to 10.7 m) tall, with aromatic and distinctively shaped "double" leaves.These hourglass-shaped leaves comprise the leaf blade plus a flattened, leaf-like stalk or petiole). The fruit is rough and green; it is distinguished by its bumpy exterior and its small size (approx. 4 cm (2 in) wide)