Citrus 'Calamondin' (Citrus × microcarpa Bunge), also known as Calamansi is an artificial hybrid between kumquat (formerly considered as belonging to a separate genus Fortunella) and another species of Citrus (in this case probably the mandarin orange). It  is a shrub or small tree. The plant is characterized by wing-like appendages on the leaf petioles and white or purplish flowers. The fruit of the calamansi resembles a small, round lime. The center pulp and juice is the orange color of a tangerine with a very thin orange peel when ripe. The fruits are sour and are often used for preserves or cooking.
 
The grower instructs  that the fruits are more for decoration than consumption.
 
The grower instructs  that the fruits are more for decoration than consumption.
 
Calamansi is the Philippine English spelling of Tagalog kalamansi ([kɐlɐmɐnˈsɪʔ]), and is the name by which it is most widely known in the Philippines. In parts of the United States (notably Florida), calamansi is also known as "calamondin", an old name from the American period of the Philippines. It is an anglicized form of the alternate Tagalog name kalamunding.Other English common names of calamansi include: lemonsito (or limoncito), philippine lime, calamonding, calamondin orange, calamandarin, golden lime, Philippine lemon, Panama orange (also used for kumquats), musk orange, bitter-sweets and acid orange.
 
The generic name originated from Latin, where it referred to either the plant now known as citron (C. medica) or a conifer tree (Thuja). It is related to the ancient Greek word for cedar, κέδρος (kédros).