The scientific name for calamansi is Citrofortunella microcarpa. Belonging to the Rutaceae family, calamansi is also commonly called kalamondin, kalamansi, Philippine lemon and calamondin orange.
Calamansi, which is native to Philippines, is a slightly spiny citrus plant. Normally growing from 3 to 5 feet, it blooms throughout the year. Its fruit turns from dark green to orange-yellow when ripe. Around 1.75 inches in diameter, the fruit is acidic and juicy with a citrus flavor, similar to that of limes and lemons. It is used in seafood dishes for improving iron absorption. Calamansi juice is applied to the scalp after shampooing to improve hair growth or to get rid of scalp itching.