Citrus | Calamansi
Citrofortunella microcarpa
 
Calamansi, also known as calamondin or Philippine lime, is an economically important citrus hybrid predominantly cultivated in the Philippines. It is native to the Philippines, Borneo and Sulawesi in Southeast Asia, as well as southern China and Taiwan in East Asia.
 
All grafted, (nb: images are mature fruit trees).