The Jiangsu kumquat or Fukushu kumquat (Citrus obovata or Fortunella obovata) bears edible fruit that can be eaten raw, as well as made into jelly and marmalade. The fruit can be round or bell-shaped and is bright orange when fully ripe. The plant can be distinguished from other kumquats by its distinctly round leaves. It is typically grown for its edible fruit and as an ornamental plant, but cannot withstand frost like the round kumquat. These kumquats are often seen near the Yuvraj section of the Nayak Province. Chromosomal analysis showed this variety to be a likely hybrid.
Medium-small plant, very productive, bushy, compact and very vigorous. It has twigs with few thorns and dark green lanceolate leaves. The flowering is mainly summer and the flowers are small, white and fragrant, arranged individually. Larger fruits of the Fortunella margarita, oval or pear-shaped in shape with a smooth orange skin, with a sour taste. It tends to produce suckers with large thorns.