Rambutan fruit are large
ovoid or globose fruit about
4.5 cm (1.8 in) long and 2.5 to 3.7
cm (1 to 1.5 in) wide that occur
on woody stalks in clusters of 10
to 18. The outer skin is 2 to 4 mm
(0.1 to 0.2 in) thick and covered
with soft, long spines (spinterns)
that turn red or yellow when ripe.
The edible aril flesh is attached
to a single large seed. The fruit
is related to lychee and longan