Mandarin, although the tree is not small. The kumquat has small fruits, usually made into marmalade.
the English of calamansi is "small citrus fruit"
Citrus paradisi.
The scientific name would be Citrus paradisi x reticulata.
The mandarin is a type of citrus fruit and it is also the name given to a type of porcelain.
A lemon or a grapefruit.
Citrus limon
lemon
The pomelo.
Citrus sinensis
Gooseberry is an edible fruit. They can be eaten or used in pies.
As it's name, It's a FRUIT.
An orange-specifically, the sweet orange-is the citrus Citrus × ​sinensis (syn. Citrus aurantium L. var. dulcis L., or Citrus aurantiumRisso) and its fruit. The orange is a hybrid of ancient cultivated origin, possibly between pomelo (Citrus maxima) and mandarin (Citrus reticulata).[2] It is a small flowering tree growing to about 3 m tall with evergreen leaves, which are arranged alternately, of ovate shape with crenulate margins and 4-10 cm long. The orange fruit is a hesperidium, a type of berry.