Citrus depressa

Shīkwāsā
Shīkwāsās on a tree
Scientific classification
Kingdom:	Plantae
Division:	Magnoliophyta
Class:	Magnoliopsida
Subclass:	Rosidae
Order:	Sapindales
Family:	Rutaceae
Genus:	Citrus
Species:	C. × depressa
Binomial name
Citrus × depressa (Hayata)

Citrus depressa (Citrus × depressa, formerly C. pectinifera, Okinawan シークヮーサー or シークァーサー shīkwāsā, Japanese ヒラミレモン hirami remon), in English sometimes called Taiwan tangerine, flat lemon, hirami lemon, or thin-skinned flat lemon, is a small, green citrus fruit rich in flavonoids and native to Taiwan and Okinawa, Japan. Very sour, it is often used like lemon or lime to garnish dishes, but is also used to make a yellow juice, which can be thinned or sweetened.

A bottle of shikwasa juice

Its name is occasionally translated into English as kalamansî, but strictly speaking this is a different fruit.